/* 4. ´ÙÀ½ ÇÁ·Î±×·¥ÀÇ Ãâ·ÂÀ» ½á¶ó. */

#include <stdio.h>

void what(int d,int *c,int b,int *a)
{
	d = *c;
	*c = b;
	b = *a;
	*a = d;
}

main()
{
	int a = 10;
	int b = 20;
	int c = 30;
	int d = 40;

	what(a,&b,c,&d);

	printf("a = %d\nb = %d\nc = %d\nd = %d\n",a,b,c,d);
}