557 lines
15 KiB
C
557 lines
15 KiB
C
/**
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* @file student_crud.c
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* @brief 学生数据增删改操作实现
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* @note 负责学生信息的添加、删除、修改等CRUD操作
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "config.h"
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#include "globals.h"
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#include "io_utils.h"
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#include "validation.h"
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#include "statistical_analysis.h"
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/**
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* @brief 输入并验证学生学号
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* @details 循环输入学号直到格式正确且不重复
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* @param student 指向要填充的学生结构体的指针
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*/
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static void inputStudentID(Student *student)
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{
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while (1)
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{
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safeInputString("请输入学号", student->studentID, MAX_ID_LENGTH);
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if (!isValidStudentId(student->studentID))
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{
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printError("学号格式无效！");
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continue;
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}
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// 检查学号是否已存在
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bool exists = false;
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for (int i = 0; i < studentCount; i++)
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{
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if (strcmp(students[i].studentID, student->studentID) == 0)
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{
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printError("学号已存在！");
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exists = true;
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break;
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}
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}
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if (!exists)
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break;
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}
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}
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/**
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* @brief 输入并验证学生基本信息
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* @details 输入学生的姓名、年龄和性别信息
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* @param student 指向要填充的学生结构体的指针
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*/
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static void inputBasicInfo(Student *student)
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{
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// 输入姓名
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while (1)
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{
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safeInputString("请输入姓名", student->name, MAX_NAME_LENGTH);
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if (isValidName(student->name))
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break;
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printError("姓名格式无效！");
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}
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// 输入年龄
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while (1)
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{
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student->age = safeInputInt("请输入年龄", 10, 100);
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if (isValidAge(student->age))
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break;
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printError("年龄输入无效！年龄必须在合理范围内。");
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}
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// 输入性别
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while (1)
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{
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char gender = safeInputChar("请输入性别 (M/F)");
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if (isValidGender(gender))
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{
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student->gender = gender;
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break;
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}
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printError("性别输入无效！请输入 M 或 F");
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}
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}
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/**
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* @brief 输入学生课程信息
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* @details 循环输入课程名称和成绩，支持添加多门课程
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* @param student 指向要填充的学生结构体的指针
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*/
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static void inputCourseInfo(Student *student)
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{
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printf("\n开始输入课程信息：\n");
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student->courseCount = 0;
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while (student->courseCount < MAX_COURSES)
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{
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printf("\n第 %d 门课程：\n", student->courseCount + 1);
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// 输入课程名称并验证
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while (1)
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{
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safeInputString("课程名称",
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student->courses[student->courseCount],
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MAX_COURSE_NAME_LENGTH);
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if (isValidCourseName(student->courses[student->courseCount]))
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break;
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printError("课程名称格式无效！课程名称不能为空。");
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}
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// 输入课程分数并验证
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while (1)
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{
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student->scores[student->courseCount] =
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safeInputFloat("课程分数", MIN_SCORE, MAX_SCORE);
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if (isValidScore(student->scores[student->courseCount]))
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break;
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printError("成绩输入无效！成绩必须在0-100分之间。");
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}
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student->courseCount++;
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if (student->courseCount < MAX_COURSES)
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{
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char choice = safeInputChar("\n是否继续添加课程？(y/n)");
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if (choice != 'y' && choice != 'Y')
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{
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break;
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}
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}
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}
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}
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/**
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* @brief 显示添加成功的学生信息
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* @details 显示新添加学生的基本信息和统计数据
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* @param student 指向学生结构体的指针
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*/
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static void displayAddedStudentInfo(const Student *student)
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{
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printSuccess("学生信息添加成功！");
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printf("学号: %s\n", student->studentID);
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printf("姓名: %s\n", student->name);
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printf("总分: %.2f\n", student->totalScore);
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printf("平均分: %.2f\n", student->averageScore);
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}
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/**
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* @brief 添加学生信息
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* @details 交互式地添加新学生信息，包括基本信息和课程成绩
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* 验证学号唯一性、姓名格式、年龄范围等
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* 自动计算总分和平均分
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* @note 会检查学生数量是否已达上限MAX_STUDENTS
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* @note 学号必须唯一，不能与现有学生重复
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* @warning 如果学生数量已满，会显示错误信息并返回
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* @see MAX_STUDENTS, isValidStudentId(), isValidName()
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*/
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void addStudent()
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{
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clearScreen();
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printHeader("添加学生信息");
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if (studentCount >= MAX_STUDENTS)
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{
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printError("学生数量已达上限！");
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pauseSystem();
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return;
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}
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Student newStudent;
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memset(&newStudent, 0, sizeof(Student));
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printf("\n");
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// 输入学号
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inputStudentID(&newStudent);
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// 输入基本信息
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inputBasicInfo(&newStudent);
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// 输入课程信息
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inputCourseInfo(&newStudent);
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// 计算总分和平均分
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calculateStudentStats(&newStudent);
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// 添加到数组
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students[studentCount] = newStudent;
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studentCount++;
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// 标记数据已修改
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dataModified = true;
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statsNeedUpdate = true;
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// 使统计缓存无效
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invalidateCache();
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// 显示添加成功信息
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displayAddedStudentInfo(&newStudent);
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pauseSystem();
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}
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/**
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* @brief 删除学生信息
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* @details 提供交互式界面删除指定学号的学生信息
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* 包含确认机制，防止误删除操作
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* @note 删除流程：
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* 1. 输入要删除的学生学号
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* 2. 查找并显示学生信息
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* 3. 用户确认删除操作
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* 4. 删除学生并重新排列数组
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* 5. 更新数据修改和统计更新标志
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* @warning 删除操作不可逆，请谨慎操作
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* @warning 如果没有学生数据，将显示警告信息
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*/
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void deleteStudent()
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{
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clearScreen();
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printHeader("删除学生信息");
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if (studentCount == 0)
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{
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printWarning("暂无学生数据！");
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pauseSystem();
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return;
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}
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char studentID[MAX_ID_LENGTH];
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printf("\n");
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safeInputString("请输入要删除的学生学号", studentID, MAX_ID_LENGTH);
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// 查找学生
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for (int i = 0; i < studentCount; i++)
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{
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if (strcmp(students[i].studentID, studentID) == 0)
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{
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printf("\n找到学生信息：\n");
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printf("学号: %s\n", students[i].studentID);
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printf("姓名: %s\n", students[i].name);
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char choice = safeInputChar("\n确认删除？(y/n)");
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if (choice == 'y' || choice == 'Y')
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{
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// 移动后面的学生向前
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for (int j = i; j < studentCount - 1; j++)
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{
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students[j] = students[j + 1];
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}
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studentCount--;
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dataModified = true;
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statsNeedUpdate = true;
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// 使统计缓存无效
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invalidateCache();
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printSuccess("学生信息删除成功！");
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}
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else
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{
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printInfo("删除操作已取消。");
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}
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pauseSystem();
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return;
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}
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}
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printError("未找到该学号的学生！");
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pauseSystem();
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}
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/**
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* @brief 显示学生基本信息
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* @details 显示学生的学号、姓名、年龄、性别等基本信息
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* @param student 指向学生结构体的指针
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*/
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static void displayStudentBasicInfo(const Student *student)
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{
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printf("\n找到学生信息：\n");
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printf("学号: %s\n", student->studentID);
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printf("姓名: %s\n", student->name);
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printf("年龄: %d\n", student->age);
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printf("性别: %c\n", student->gender);
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}
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/**
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* @brief 修改学生性别
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* @details 循环输入直到获得有效的性别值
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* @param student 指向学生结构体的指针
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*/
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static void modifyStudentGender(Student *student)
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{
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while (1)
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{
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char gender = safeInputChar("请输入新性别 (M/F)");
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if (isValidGender(gender))
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{
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student->gender = gender;
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break;
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}
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printError("性别输入无效！");
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}
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}
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/**
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* @brief 修改现有课程成绩
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* @details 选择并修改学生的现有课程成绩
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* @param student 指向学生结构体的指针
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*/
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static void modifyExistingCourse(Student *student)
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{
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if (student->courseCount == 0)
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{
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printWarning("该学生没有课程记录！");
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return;
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}
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int courseIndex = safeInputInt("请选择要修改的课程", 1, student->courseCount) - 1;
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// 验证索引有效性
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if (!isValidIndex(courseIndex, student->courseCount))
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{
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printError("课程索引无效！");
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return;
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}
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// 输入新成绩并验证
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while (1)
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{
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student->scores[courseIndex] = safeInputFloat("新成绩", MIN_SCORE, MAX_SCORE);
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if (isValidScore(student->scores[courseIndex]))
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break;
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printError("成绩输入无效！成绩必须在0-100分之间。");
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}
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}
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/**
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* @brief 添加新课程
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* @details 为学生添加新的课程和成绩
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* @param student 指向学生结构体的指针
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*/
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static void addNewCourse(Student *student)
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{
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if (student->courseCount >= MAX_COURSES)
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{
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printWarning("课程数量已达上限！");
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return;
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}
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// 输入课程名称并验证
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while (1)
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{
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safeInputString("课程名称", student->courses[student->courseCount], MAX_COURSE_NAME_LENGTH);
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if (isValidCourseName(student->courses[student->courseCount]))
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break;
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printError("课程名称格式无效！课程名称不能为空。");
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}
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// 输入课程成绩并验证
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while (1)
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{
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student->scores[student->courseCount] = safeInputFloat("课程成绩", MIN_SCORE, MAX_SCORE);
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if (isValidScore(student->scores[student->courseCount]))
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break;
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printError("成绩输入无效！成绩必须在0-100分之间。");
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}
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student->courseCount++;
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}
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/**
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* @brief 删除课程
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* @details 删除学生的指定课程和成绩
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* @param student 指向学生结构体的指针
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*/
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static void deleteCourse(Student *student)
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{
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if (student->courseCount == 0)
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{
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printWarning("该学生没有课程记录！");
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return;
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}
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int courseIndex = safeInputInt("请选择要删除的课程", 1, student->courseCount) - 1;
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// 验证索引有效性
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if (!isValidIndex(courseIndex, student->courseCount))
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{
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printError("课程索引无效！");
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return;
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}
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// 移动数组元素
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for (int k = courseIndex; k < student->courseCount - 1; k++)
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{
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strncpy(student->courses[k], student->courses[k + 1], MAX_COURSE_NAME_LENGTH - 1);
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student->courses[k][MAX_COURSE_NAME_LENGTH - 1] = '\0';
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student->scores[k] = student->scores[k + 1];
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}
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student->courseCount--;
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}
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/**
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* @brief 显示课程列表
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* @details 显示学生的所有课程和成绩
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* @param student 指向学生结构体的指针
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*/
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static void displayCourseList(const Student *student)
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{
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printf("\n当前课程列表：\n");
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for (int j = 0; j < student->courseCount; j++)
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{
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printf("%d. %s: %.2f\n", j + 1, student->courses[j], student->scores[j]);
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}
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}
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/**
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* @brief 修改课程信息
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* @details 提供课程修改的子菜单，包括修改、添加、删除课程
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* @param student 指向学生结构体的指针
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* @return true 如果进行了课程修改，false 如果没有修改
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*/
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static bool modifyCourseInfo(Student *student)
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{
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displayCourseList(student);
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printf("\n修改选项：\n");
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printf("1. 修改现有课程成绩\n");
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printf("2. 添加新课程\n");
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printf("3. 删除课程\n");
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printf("0. 返回\n");
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int courseChoice = safeInputInt("请选择操作", 0, 3);
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switch (courseChoice)
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{
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case 1: // 修改现有课程成绩
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modifyExistingCourse(student);
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return true;
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case 2: // 添加新课程
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addNewCourse(student);
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return true;
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case 3: // 删除课程
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deleteCourse(student);
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return true;
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case 0:
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return false;
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}
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return false;
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}
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/**
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* @brief 处理学生信息修改
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* @details 处理找到学生后的修改操作
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* @param student 指向学生结构体的指针
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*/
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static void handleStudentModification(Student *student)
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{
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displayStudentBasicInfo(student);
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printf("\n修改选项：\n");
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printf("1. 修改姓名\n");
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printf("2. 修改年龄\n");
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printf("3. 修改性别\n");
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printf("4. 修改课程成绩\n");
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printf("0. 返回\n");
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int choice = safeInputInt("请选择修改项", 0, 4);
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bool courseModified = false;
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switch (choice)
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{
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case 1: // 修改姓名
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safeInputString("请输入新姓名", student->name, MAX_NAME_LENGTH);
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break;
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case 2: // 修改年龄
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student->age = safeInputInt("请输入新年龄", 10, 100);
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break;
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case 3: // 修改性别
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modifyStudentGender(student);
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break;
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case 4: // 修改课程成绩
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courseModified = modifyCourseInfo(student);
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break;
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case 0:
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return;
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}
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if (courseModified)
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{
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calculateStudentStats(student);
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}
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dataModified = true;
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statsNeedUpdate = true;
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// 使统计缓存无效
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invalidateCache();
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printSuccess("学生信息修改成功！");
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}
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/**
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* @brief 修改学生信息
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* @details 提供交互式界面修改指定学生的各项信息
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* 支持修改姓名、年龄、性别和课程成绩等信息
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* @note 修改选项：
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* 1. 修改姓名
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* 2. 修改年龄
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* 3. 修改性别
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* 4. 修改课程成绩（包括修改现有成绩、添加新课程、删除课程）
|
|
* @note 课程成绩修改包含：
|
|
* - 修改现有课程成绩
|
|
* - 添加新课程
|
|
* - 删除课程
|
|
* @warning 修改课程信息后会自动重新计算总分和平均分
|
|
*/
|
|
void modifyStudent()
|
|
{
|
|
clearScreen();
|
|
printHeader("修改学生信息");
|
|
|
|
if (studentCount == 0)
|
|
{
|
|
printWarning("暂无学生数据！");
|
|
pauseSystem();
|
|
return;
|
|
}
|
|
|
|
char studentID[MAX_ID_LENGTH];
|
|
printf("\n");
|
|
safeInputString("请输入要修改的学生学号", studentID, MAX_ID_LENGTH);
|
|
|
|
// 查找学生
|
|
for (int i = 0; i < studentCount; i++)
|
|
{
|
|
if (strcmp(students[i].studentID, studentID) == 0)
|
|
{
|
|
handleStudentModification(&students[i]);
|
|
pauseSystem();
|
|
return;
|
|
}
|
|
}
|
|
|
|
printError("未找到该学号的学生！");
|
|
pauseSystem();
|
|
} |