Macro

Question

Consider the following C program

# include<stdio.h>
# define fun(i, j) i * j
# define gun(q) q * q
int main( )
{
int i = 4;
int j = 3;
printf(“%d”, fun(fun(i + 2, j), gun(j + 2)));
return 0;
}

The output of the program is _______

Comments

is the answer 21??

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nope. 30 is correct

Answer 1

30 will be printed.

Answer 2

i+2*j*j+2*j+2

=4+2*3*3+2*3+2

=4+18+6+2

=30