题解 | 字母统计

#include<bits/stdc++.h>
using namespace std;

int main() {
	map<char, int> m;
	string s;
	cin >> s;
	for (int i = 'A'; i < 'Z'; i++) {
		m[i] = 0;
	}
	for (int i = 0; i < s.length(); i++) {
		m[s[i]]++;
	}
	for (map<char, int>::iterator it = m.begin(); it != m.end(); ++it) {
		if (it->first >= 'A' && it->first <= 'Z') {
			cout << it->first << ":" << it->second << endl;
		}
		
	}

}