Swap with Pointers

Lab C Beginner 10 points

Write void swap(int *a, int *b). Read two numbers, swap them with your function and print them.

Input

Two integers.

Output

One line.

Example

Input

3 9

Output

9 3

Sample input available Sample output available

Editor

Hints

C passes copies of arguments; passing addresses lets the function change the caller's variables.

Solution explanation

A swap(int a, int b) would only swap its own copies - pointers are needed.

Show solution

#include <stdio.h>

void swap(int *a, int *b) {
    int t = *a;
    *a = *b;
    *b = t;
}

int main() {
    int x, y;
    scanf("%d %d", &x, &y);
    swap(&x, &y);
    printf("%d %d\n", x, y);
    return 0;
}

Output

Answer