86 lines
1.4 KiB
C
86 lines
1.4 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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// !结构与函数
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/*
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1.结构作为函数参数
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int numberofDays(struct date d)
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整个结构可以作为参数的值传入函数
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这时候是在函数内新建一个结构变量，并复制调用者的结构的值
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也可以返回一个结构
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这与数组完全不同
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*/
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struct data
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{
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int month;
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int day;
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int year;
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};
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bool isLeap(struct data d);
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int numberOfDays(struct data d);
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int main(void)
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{
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struct data today, tomorrow;
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printf("Enter today's date (mm dd yyyy): ");
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scanf("%i %i %i", &today.month, &today.day, &today.year);
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if (today.day != numberOfDays(today))
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{
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tomorrow.day = today.day + 1;
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tomorrow.month = today.month;
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tomorrow.year = today.year;
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}
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else if (today.month == 12)
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{
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tomorrow.day = 1;
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tomorrow.month = 1;
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tomorrow.year = today.year + 1;
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}
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else
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{
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tomorrow.day = 1;
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tomorrow.month = today.month + 1;
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tomorrow.year = today.year;
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}
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printf("Tomorrow's date is %i-%i-%i.\n", tomorrow.month, tomorrow.day, tomorrow.year);
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return 0;
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}
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bool isLeap(struct data d)
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{
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bool leap = false;
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if ((d.year % 4 == 0 && d.year % 100 != 0) || d.year % 400 == 0)
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{
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leap = true;
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}
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return leap;
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}
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int numberOfDays(struct data d)
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{
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int days;
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const int daysPerMonth[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
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if (d.month == 2 && isLeap(d))
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{
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days = 29;
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}
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else
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{
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days = daysPerMonth[d.month - 1];
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}
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return days;
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} |