PAT B Zhenti 1086 will not tell you in C ++

topic

Homework time, sitting next Xiaopen friends ask you: "Five multiplied by seven equals how many?" You should be polite to enclose smiled and told him:. "Fifty-three" This question requires you, for any pair given positive integer, output their product backwards.

Input format:
Enter two given positive integer of not more than 1000 A and B in the first row, separated by a space therebetween.
Output format:
backwards product of the output of A and B in a row.
Sample input:
57
sample output:
53

Thinking

Output to modulo cycle.

Note that the results for the case of "01", leading zeros are not output here with a flag control, did not encounter characters have non-zero is false, that is not output to zero.

Code

#include <iostream>
using namespace std;

int main(){
    int a, b;
    cin >> a >> b;
    a *= b;
    bool flag = false;
    while (a!=0){
        int temp = a % 10;
        if (temp==0){
            if (flag){
                cout << temp;
            }
        }
        else{
            cout << temp;
            flag = true;
        }
        a /= 10;
    }
    cout << endl;
    return 0;
}