上海交通大学机试 字母统计 Easy

#include<stdio.h>
#include<stdlib.h>
#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
using namespace std;

int num[26];

int main() {
	string s;
	while (getline(cin,s)){
		fill(num, num + 26, 0);
		for (int i = 0; i < s.size(); i++) {
			if (s[i] >= ‘A‘&&s[i] <= ‘Z‘) {
				num[s[i] - ‘A‘]++;
			}
		}
		for (int i = 0; i < 26; i++) {
			printf("%c:%d\n", ‘A‘ + i, num[i]);
		}
	}
	return 0;
}