Challenge: Swap with Pointers

Lab C++ Beginner 10 points

Complete the function void swapPtr(int* a, int* b) so it swaps the two values its pointers point to. The starter reads two numbers, calls it and prints them.

Input

Two integers.

Output

The two integers swapped.

Example

Input

3 8

Output

8 3

Sample input available Sample output available

Editor

C++

Hints

*a is the value a points to.

Save *a in a temp variable, then *a = *b, then *b = temp.

Solution explanation

The function receives addresses, so writing through *a and *b changes x and y in main.

Show solution

#include <iostream>
using namespace std;

void swapPtr(int* a, int* b) {
    int temp = *a;
    *a = *b;
    *b = temp;
}

int main() {
    int x, y;
    cin >> x >> y;
    swapPtr(&x, &y);
    cout << x << " " << y << "\n";
    return 0;
}

Output

Answer