switch two variables with pointers

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


void Zamijeni(int* a, int* b)
{
    int a1=*a;
    *a=*b;
    *b=a1;

}
int main()
{
    int* a=3; int *b=5;
    Zamijeni(&a, &b);
    printf("a = %d i b= %d ", a,b);
}