Question

C语言编程判断是否是闰年

此程序有个错误，高手指教指教#include <stdio.h>void main (){ int year; scanf("请输入年份%d",year); if((year%4==0)&&(year%400==0)||(year%100!==0)); printf("此年是闰年\n"); else printf("此年不是闰年\n");}

Answer 1

不能用void main前面用int

Answer 2

#include<stdio.h>
int main()
{
int year,leap;
printf("enter year:");
scanf("%d",&year);
if(year%4==0){
if(year%100==0)
{
if(year%400==0)
leap=1;
else leap=0;
}
else leap=1;
}
else leap=0;
if(leap)
printf("%d is ",year);
else
printf("%d is not ",year);
printf("a leap year.\n");

return 0;
}

Answer 3

# include<stdio.h>
void main()
{
int year;
printf("请输入年份.\n");
scanf("%d",&year);
if((year%4==0)&&(year%100!=0)||(year%400==0))
printf("此年是闰年\n");
else
printf("此年不是闰年\n");
}