题解 | 字母统计
#include <iostream>
#include <map>
#include <string>
using std::cout;
using std::cin;
using std::endl;
using std::string;
using std::map;
int main()
{
string str;
while(cin >> str){
map<char,int> Map;
string tmp = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
for(auto elem : tmp)
Map[elem] = 0; // 初始化
for(auto elem : str){
if(elem >= 'A' && elem <= 'Z'){
Map[elem]++;
}
}
for(auto& [k,v] : Map){
cout << k << ':' << v << endl;
}
}
return 0;
}