/* 2. ´ÙÀ½ ÇÁ·Î±×·¥ÀÇ Ãâ·ÂÀ» ½á¶ó. */

#include <stdio.h>

void what(int z,int *y,int x)
{
	z = *y;
	*y = x;
	x = z;
}

main()
{
	int x = 10;
	int y = 20;
	int z = 30;

	what(x,&y,z);

	printf("x = %d\ny = %d\nz = %d\n",x,y,z);
}