题解 | 统计字符

#include <iostream>
#include <string>
using namespace std;

int main() {
    string s1, s2;
    while (getline(cin, s1)) { // 注意 while 处理多个 case
        if (s1 == "#") {
            break;
        }
        getline(cin, s2);
        for (int i = 0; i < s1.size(); i++) {
            cout << s1[i] << " ";
            int k = 0;
            for (int j = 0; j < s2.size(); j++) {
                if (s1[i] == s2[j]) {
                    k++;
                }
            }
            cout << k << endl;
        }
    }
}
// 64 位输出请用 printf("%lld")