7-1-4 how to use function to do array swap.c

7-1-4 how to use function to do array swap.c

#include <stdio.h>
#include <stdlib.h>

void func(int []);

int main()
{
    int a[2] = {3,6};
    printf("Original %d %d\n", a[0], a[1]);
    func(a);
    printf("Modified %d %d\n", a[0], a[1]);

    return 0;
}

void func(int a[])
{
    int temp;
    temp = a[0];
    a[0] = a[1];
    a[1] =  temp;
}