字符串统计:

#include<iostream>
#include<cstring>
using namespace std;
int main(){
    char str[1000];
    int n;
    cin>>n;
    while(n--){
        cin>>str;
        int i,count=0;
        int length=strlen(str);
        for(i=0;i<length;++i)
            if(str[i]<='9'&&str[i]>='0')
                count++;
        cout<<count<<endl;
    }
    return 0;
}