c语言，这道题怎么判断输入数据的合理性？

Question

如题所述

Answer 1

#include <stdio.h>

int main()

{

int year;

if(scanf("%d",&year) == 0)

{

printf("Input error!\n");

return 0;

}

if(year < 1)

printf("Input error!\n");

else if((year%400==0) || (year%4==0&&year%100!=0))

printf("Yes\n");

else

printf("No\n");

}

---

Answer 2

#include<stdio.h>

int main()

{

int n;

scanf("%d",&n);

if(n>=1)

{

if(n%4==0&&n%100!=0||n%400==0)

printf("Yes\n");

else

printf("No\n");

}

else

printf("input error!\n");

}

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