简单题解

#include <bits/stdc++.h>
using namespace std;
int lcnt, dcnt, ocnt;
string str;
int main() {
    getline(cin, str);
    for(int i = 0;str[i] != '?';i++) {
        if('a' <= str[i] && str[i] <= 'z' || 'A' <= str[i] && str[i] <= 'Z') {
            lcnt++;
        }else if('0' <= str[i] && str[i] <= '9') {
            dcnt++;
        }else{
            ocnt++;
        }
    }
    printf("Letters=%d\nDigits=%d\nOthers=%d", lcnt, dcnt, ocnt);
    return 0;
}