c puzzle book basic type 3

bt3.c

#include <stdio.h>
 
#define PR(x) printf("x = %g\t",(double)(x))
#define NL putchar('\n') 
#define PRINT1(x1) PR(x1); NL 
#define PRINT2(x1,x2) PR(x1); PRINT1(x2) 

int main() 
{ 
	double d=3.2,x; 
	int i=2, y;

	x = (y=d/i)*2; PRINT2(x,y); 
	y = (x=d/i)*2; PRINT2(x,y); 

	y = d * (x=2.5/d); PRINT1(y); 
	x = d * (y = ((int)2.9+1.1)/d); PRINT2(x,y);

	return 0;

}

bash

 gcc bt3.c
inst19@teachB:~$ ./a.out
x = 2   x = 1
x = 1.6 x = 3
x = 2
x = 0   x = 0

bt3a.c

#include <stdio.h>

#define PR(x) printf(#x" = %g\t",(double)(x))
#define NL putchar('\n')
#define PRINT1(x1) PR(x1); NL
#define PRINT2(x1,x2) PR(x1); PRINT1(x2)

int main()
{
        double d=3.2,x;
        int i=2, y;

        x = (y=d/i)*2; PRINT2(x,y);
        y = (x=d/i)*2; PRINT2(x,y);

        y = d * (x=2.5/d); PRINT1(y);
        x = d * (y = ((int)2.9+1.1)/d); PRINT2(x,y);

        return 0;

}

bash

x = 2   y = 1
x = 1.6 y = 3
y = 2
x = 0   y = 0