题解 | #统计字符串中各字母字符对应的个数#

#include <iostream>
// write your code here......
#include <string.h>
#include <map>
using namespace std;

int main() {

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

    // write your code here......
    int n = strlen(str);
    map<char, int> letter;  // map初始化
    // int n = strlen(str);
    for(int i = 0; i < n; ++i) {
        //cout << str[i] - '0' << " ";
        if(str[i] == ' ' || ((str[i] - '0') >= 0 && (str[i] - '0') <= 9))
            continue;
        if(letter.find(str[i]) == letter.end()) {
            letter[str[i]] = 1;
        }else
            letter[str[i]]++;
        
    }
    // cout << endl;
    for(auto key : letter) {
        cout << key.first << ":" << key.second << endl;
    }

    return 0;
}