题解 | #统计字符#

#include <iostream>
#include<string>
using namespace std;

int main() {
    string str;
    getline(cin, str);
    int countAbc = 0, countKong = 0, countNum = 0, countOther = 0;
    for (int i = 0; i < str.size(); i++) {
        if ((str[i] >= 65 && str[i] <= 90) || (str[i] >= 97 && str[i] <= 122)) {  //字符计数
            countAbc++;
        } else if (str[i] == ' ') {  //空格计数
            countKong++;
        } else if (str[i] >= 48 && str[i] <= 57) {  //数字计数
            countNum++;
        } else {  //其他字符计数
            countOther++;
        }
    }
    cout << countAbc << endl;
    cout << countKong << endl;
    cout << countNum << endl;
    cout << countOther;
    return 0;
}