题解 | #字符的个数#

#include <iostream>
#include <bits/stdc++.h>
#include <string>
#include <map>
using namespace std;
int main() {
    string s;
    cin >> s;
    // write your code here......
    string::iterator itr;
    map<char, int> m;
    for (itr = s.begin(); itr != s.end(); ++itr) {
        if (*itr == 'a') {
            m[*itr]++;
        } else if (*itr == 'b') {
            m[*itr]++;
        } else if (*itr == 'c') {
            m[*itr]++;
        }
    }
    for (map<char, int>::iterator itr = m.begin(); itr != m.end(); ++itr) {
        cout << itr->second << " ";
    }
    cout << endl;
    return 0;
}