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C语言:编程求任意月份的天数

舟海君 2022-05-18 阅读 108

闰年问题,因为二月份的天数与闰年有关。闰年的判断依据是:若某年能被4整除,但不能被100整除,则这一年是闰年;若某年能被400整除,则这一年也是闰年

C语言:编程求任意月份的天数_整除

#include <stdio.h>
#include <stdlib.h>
main(){
int year, month, days;
while (1)
{

printf("输入年份:");
scanf("%d",&year);
if (year==9999)
break;
printf("输入月份:");
scanf("%d", &month);
switch(month){
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
days=31;
break;
case 4:
case 6:
case 9:
case 11:
days=30;
break;
case 2:
// 判断闰年
if(year%4==0 && year%100!=0 || year%400==0)
days=29;
else
days=28;
break;
default:
printf("月份输入错误!\n");
exit(1);
break;
}
printf("天数:%d\n", days);
}
}

 改进1:bz为1时表示月份输入错误,不用输出天数

C语言:编程求任意月份的天数_整除_02

#include <stdio.h>
#include <stdlib.h>
main(){
int year, month, days,bz;
while (1)
{
bz=0;
printf("输入年份:");
scanf("%d",&year);
if (year==9999)
//break;
exit(1);
printf("输入月份:");
scanf("%d", &month);
switch(month){
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
days=31;
break;
case 4:
case 6:
case 9:
case 11:
days=30;
break;
case 2:
// 判断闰年
if(year%4==0 && year%100!=0 || year%400==0)
days=29;
else
days=28;
break;
default:
printf("月份输入错误!\n");
bz=1;
//exit(1);
break;
}
if (bz==0)
printf("天数:%d\n", days);
}
}






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