C语言实例45：结构体变量

#include <stdio.h>
#include <stdlib.h>
struct
{
    int year;
    int month;
    int day;
} data;

int main()
{
    int days;
    printf("请输入日期（年、月、日）：");
    scanf("%d, %d, %d", &data.year, &data.month, &data.day);
    switch(data.month)
    {
        case 1: days = data.day;
            break;
        case 2: days = data.day + 31;
            break;
        case 3: days = data.day + 59;
            break;
        case 4: days = data.day + 90;
            break;
        case 5: days = data.day + 120;
            break;
        case 6: days = data.day + 151;
            break;
        case 7: days = data.day + 181;
            break;
        case 8: days = data.day + 212;
            break;
        case 9: days = data.day + 243;
            break;
        case 10: days = data.day + 273;
            break;
        case 11: days = data.day + 304;
            break;
        case 12: days = data.day + 334;
            break;
    }

    if(data.year % 4 == 0%data.year%100 != 0|| data.year%400 == 0)
        if(data.month >= 3)
             days = days + 1;
        printf("%d月%d日是%d年的第%d天。\n", data.month, data.day, data.year, days);
        
        system("pause");
        return 0;
}