102 lines
1.7 KiB
C
102 lines
1.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <math.h>
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#include <stdbool.h>
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#include <string.h>
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// !结构中的结构
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/*
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1.结构数组
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struct date dates[!00];
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struct date dates[] = {
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{4,5,2005},
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{2,4,2005}
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}
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* 最外面的大括号表示数组，里面的括号表示结构体
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* 结构体本质是一种数据类型，数组是这种数据类型的变量
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2.结构中的结构
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struct dateAndTime {
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struct date sdate;
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struct time stime;
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};
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3.嵌套的结构
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struct point {
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int x;
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int y;
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};
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struct rectangle {
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struct point pt1;
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struct point pt2;
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};
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如果有变量
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struct rectangle r;
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就可以有:
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r.pt1.x、 rpt1.y, r.pt2.x 和 rpt2.y
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如果有变量定义:
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struct rectang1e r, *rp;
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rp = &r;
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那么下面的四种形式是等价的:
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r.pt1.x
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rp->pt1.x
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(rpt1).x
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(rp->pt1).x
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但是没有rp->pt1->x(因为pt1不是指针)
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*/
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struct time
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{
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int hour;
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int minute;
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int second;
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};
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struct time timeUpdate(struct time now);
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int main(void)
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{
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struct time testTime[5] = {
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{11, 59, 59},
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{12, 0, 0},
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{1, 29, 59},
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{23, 59, 59},
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{19, 12, 27}
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};
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for (int i = 0; i < 5; i++)
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{
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printf("Time is %.2i:%.2i:%.2i\n",
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testTime[i].hour, testTime[i].minute, testTime[i].second);
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{
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testTime[i] = timeUpdate(testTime[i]);
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}
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printf(" ... one second later it's %.2i:%.2i:%.2i\n",
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testTime[i].hour, testTime[i].minute, testTime[i].second);
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}
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return 0;
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}
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struct time timeUpdate(struct time now)
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{
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++now.second;
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if (now.second == 60)
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{
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now.second = 0;
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++now.minute;
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if (now.minute == 60)
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{
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now.minute = 0;
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++now.hour;
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if (now.hour == 24)
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{
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now.hour = 0;
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}
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}
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}
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return now;
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} |