#include<stdio.h>
int main()
{
    int n;
    int sum,i,ch;
    scanf("%d",&n);
    fflush(stdin);
    for(i=0;i<n;i++)
    {
        sum=0;
        while((ch=getchar())!='\n')
        {
            if(ch<='9'&&ch>='1')
                sum+=1;
        }
        printf("%d\n",sum);
    }
}
显示Time Limit Exceeded超时..
怎么优化

ch是 char类型
#include<stdio.h>
 int main()
 {
     int n;
     int sum,i,ch;
     scanf("%d",&n);
     //fflush(stdin);
     for(i=0;i<n;i++)
     {
         sum=0;
         while((ch=getchar())!='\n')
         {
             if(ch<='9'&&ch>='1')
                 sum+=1;
         }
         printf("%d\n",sum);
     }
 }

[此贴子已经被作者于2016-10-29 10:33编辑过]

去除这个的话 会影响后面字符的读入，scanf的回车会被读入进去

fflush(stdin);  改为getchar()