样例能过，但全WA

yyz0526 @ 2024-02-24 09:04:55

#include <stdio.h>
using namespace std;
int main()
{
   int n,a[110],q,b,s,g,sum;
   scanf("%d",&n);
   for(int i=0;i<n;i++){
       scanf("%d",&a[i]);
   }
   for(int i=0;i<n;i++){
       q=a[i]/1000;
       b=(a[i]/100)%10;
       s=(a[i]/10)%10;
       g=a[i]%10;
       if(g-q-b-s>0){
           sum++;
       }
   }
   printf("%d",sum);
   return 0;
}

by zrzforrest @ 2024-02-24 09:09:47

sum没有初始化为0

by yyz0526 @ 2024-02-24 09:13:56

谢谢~（已关）

by QuQ_ @ 2024-02-24 09:14:19

@yyz0526 下次定义的时候放在主函数前面定义，这样自动初始化：

#include <stdio.h>
using namespace std;
int n,a[110],q,b,s,g,sum;
int main(){
   scanf("%d",&n);
   for(int i=0;i<n;i++){
       scanf("%d",&a[i]);
   }
   for(int i=0;i<n;i++){
       q=a[i]/1000;
       b=(a[i]/100)%10;
       s=(a[i]/10)%10;
       g=a[i]%10;
       if(g-q-b-s>0){
           sum++;
       }
   }
   printf("%d",sum);
   return 0;
}

像这样

by yyz0526 @ 2024-02-24 09:15:11

@QuQ_ 好的