Exercise 4.14

Page 91

Define a macro swap(t,x,y) that interchanges two arguments of type t. (Block structure will help.)

#include <stdio.h>

#define swap(t, x, y)                                                          \
	t temp = x;                                                            \
	x = y;                                                                 \
	y = temp;

int main()
{
	int x = 1;
	int y = 2;
	swap(int, x, y);
	printf("x: %d, y: %d\n", x, y);
}