题解 | 统计字符串中各类型字符的个数

#include <iostream>
#include <cstring>
#include <cctype>
using namespace std;

int main() 
{

    int letter = 0;
    int digit = 0;
    int space = 0;
    int other = 0;
    
    char buf[1024] = {0};
    cin.getline(buf, sizeof(buf));

    // write your code here......
    for(int i=0;i<strlen(buf);i++)
    {
        if(isalpha(buf[i]))
            letter++;
        else if(isdigit(buf[i]))
            digit++;
        else if(isspace(buf[i]))
            space++;
        else
            other++;
    }

    cout << "letter:" << letter << " digit:" << digit << " space:" << space << " other:" << other << endl;

    return 0;
}