题解 | #统计字符串中各类型字符的个数#

#include <iostream>
#include <cstring>
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; buf[i] !='\0'; i++) {
        char c = buf[i];
        if(c >= 'a' && c <= 'z' || c >='A' && c <= 'Z')
            letter++;
        else if (c >= '0' && c<= '9')
            digit++ ;
        else if (c == ' ')
            space++;
        else
            other++;
    }

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

    return 0;
}