题解 | #字母统计#

#include <iostream>

using namespace std;

int main() {
    string str;
    int count;
    while (getline(cin, str)) {
        for (int j = 'A'; j <= 'Z'; j++) {
            count = 0;
            for (int i = 0; i < str.size(); i++) {

                if ((int)str[i] == j) count++;

            }
            printf("%c:%d\n", (char)j, count);
        }
    }
}