题解 | C++ #数字颠倒#

#include <bits/stdc++.h>
using namespace std;

int main() {
    long long num;
    cin >> num;
    string s;
    if(num == 0){
        char a = '0';
        s.push_back(a);
    }else if(num != 0){
        while(num % 10 || num != 0){
            char a = '0' + num % 10;
            num /=10;
            s.push_back(a);
        }
    }
    cout << s;
    return 0;
}