题解 | #使用字符函数统计字符串中各类型字符的个数#

#include <iostream>
#include <string>

using namespace std;

int main() {

    string str;
    getline(cin, str);

    int whitespace = 0;
    int digits = 0;
    int chars = 0;
    int others = 0;

    // write your code here......
    for(int i=0;i<str.size();i++){
        whitespace+=(isspace(str[i])==0?0:1);
        digits+=(isdigit(str[i])==0?0:1);
        chars+=(isalpha(str[i])==0?0:1);
    }
    others=str.size()-whitespace-digits-chars;

    cout << "chars : " << chars
        << " whitespace : " << whitespace
        << " digits : " << digits
        << " others : " << others << endl;

    return 0;
}