题解 | #统计字符串中各字母字符对应的个数#

#include <cctype>
#include <chrono>
#include <cstring>
#include <iostream>
// write your code here......
#include <map>

using namespace std;

int main() {

    char str[100] = { 0 };
    cin.getline(str, sizeof(str));

    // write your code here......
    map<char, int>m;

    for (int i = 0; i < strlen(str); i++) {
        map<char, int>::iterator it = m.find(str[i]);
        if(isalpha(str[i])){
            if (it != m.end()) {
                it->second++;
            } else {
                m.insert(pair<char, int>(str[i], 1));
            }

        }
            
                
    }

    m.erase(' ');

    for (map<char, int>::iterator it = m.begin(); it != m.end(); it++) {
        cout << it->first << ":" << it->second << endl;



    }

    return 0;
}