统计数字字符个数 题解

题目在主页，如有出错请指出

include <bits/stdc++.h>

using namespace std;

int main()
{
string s;
getline(cin, s);
int len = s.size(), cnt = 0;
for (int i = 0;i < len;i++)
if (s[i] >= '0' && s[i] <= '9') cnt++;
cout << cnt << endl;
return 0;
}