#include<stdio.h>#include<stdlib.h>#include<stdbool.h>#include<limits.h>
bool sign = true;    ／／设定一个标记
／／判断闰年
bool  Is_LeapYear(int year) {return ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0));
}
／／用数组 查找这个月多少天
int YearMonth_To_day(int year, int month) {int month_day[13] = { 29,31,28,31,30,31,30,31,31,30,31,30,31 };if (Is_LeapYear(year)) {month = 0;}return month_day[month];
}
／／计算这一天是这一年的第多少天
int  YearMonthDay_To_total(int year, int month, int day) {int month_leap[] = { 31,29,31,30,31,30,31,31,30,31,30,31 };int month_non[] = { 31,28,31,30,31,30,31,31,30,31,30,31 };int sum = 0;if (Is_LeapYear(year)) {if ((day <= 0) || (day > month_leap[month - 1])) {printf("day error\n");sign = false;return INT_MAX;}else {for (int i = 0; i < month - 1; ++i) {sum = sum + month_leap[i];}return sum + day;}}else {if ((day <= 0) || (day > month_non[month - 1])) {printf("day error\n");sign = false;return INT_MAX;}else {for (int i = 0; i < month - 1; ++i) {sum = sum + month_non[i];}return sum + day;}}}void Year() {int month, year, day,result_month,result_day_total;printf("please input  year month day\n");scanf("%d %d %d", &year, &month, &day);if (year <= 0) { printf("year error\n");sign = false;}else if ((month <= 0) || (month > 12)) {printf("month error\n");sign = false;}else{result_month = YearMonth_To_day(year, month);result_day_total = YearMonthDay_To_total(year, month, day);}if (sign) {printf("%d%3d has %d %3dth is the %d of the year\n", year, month, result_month, day, result_day_total);}}int main()
{char c;do{Year();printf("y  or  n\n");scanf("%c",&c );c = getchar();} while (c == 'y' || c == 'Y');system("pause");return 0;}