#include<stdio.h>

int swap (double *, int *);

void main()
{
	double a=10;
	int b=20;
		swap(&a, &b);
		printf("\na= %.2lf b= %d", a, b);
}


swap(double *x, int *y)
	{
		double t;
		t = *x;
		*x = *y;
		*y = t;
	printf("\nSize of x = %d", sizeof(*(&x)));
	}