题解 | #统计字符#

#include<iostream>
#include<string>

using namespace std;

int main()
{
    string str = "";
    while (getline(cin, str))
    {
        int alphaNum = 0;
        int spaceNum = 0;
        int digitNum = 0;
        int punctNum = 0;
        
        for(char c : str){
            if(isalpha(c)) alphaNum++;
            else if(isspace(c)) spaceNum++;
            else if(isdigit(c)) digitNum++;
            else if(ispunct(c)) punctNum++;
        }
        
        cout << alphaNum << endl << spaceNum << endl << digitNum << endl << punctNum << endl;
    }
    
    return 0;    
}