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++)
     {
             if(isalpha(str[i]))
             {
                  chars++;
             }
             else if(isdigit(str[i]))
             {
                  digits++;
             }
             else if(ispunct(str[i]))
             {
                 others++;
             }
             else if(isspace(str[i]))
             {
                 whitespace++;
                 
             }
     }

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

    return 0;
}