这是什么东西

太简单了

#include<iostream>
using namespace std;
int main(){
    char n;
    cin>>n;
    if(n>='A'&&n<='Z'){
        cout<<"A";
    }else if(n>='a'&&n<='z'){
        cout<<"a";
    }else if(n>='0'&&n<='9'){
        cout<<"0";
    }else{cout<<"other";}
}