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(auto 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;
}