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.length();i++)
    {
        if((str[i]>='a'&& str[i]<='z') || (str[i]>='A' && str[i]<='Z'))
            chars++;
        else if(str[i]>='0' && str[i]<='9')
            digits++;
        else if(str[i] == ' ')
            whitespace++;
        else 
            others++;
    }

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

    return 0;
}