PROGRAMMING IN C

Question

What is the output of the following program?
# include <stdio.h>
# define MUL (a, b) a ∗ b
# define pow (a) a ∗ a
int main ( )
{
int a = 3;
int b = 2;
printf (“%”, MUL (MUL (a+1, b), pow (b + 1)));
return 0;
}

Comments

OUTPUT IS 72 ???

---

I am getting 10.

---

yes 10 it is

---

Yes 10 is the correct answer.

Answer 1

  answer is 10

Answer 2

# include <stdio.h>
# define MUL (a, b) a ∗ b
# define pow (a) a ∗ a
int main ( )
{
int a = 3;
int b = 2;
printf (“%”, MUL (MUL (a+1, b), pow (b + 1)));
return 0;
}

Here we are using the #define directory, it goes through the entier program, search the macro template. whenever it finds, it replaces the macro template with appropriate macro expansion.

so expression in printf will be:

MUL ( MUL(a+1,b) , pow (b+1) )
MUL(a+1,b) *pow(b+1)
((a+1)*b)*(b+1)*(b+1)
3+1*2*2+1*2+1
3+2*2+2+1
3+4+2+1 = 10

* has higher priority than + and associativity is left to right.

Comments

( ) has higher priority than * .

---

yes it's.

---

why are we not considering () here when parenthesis have the highest priority?