Can some one explain this?

Question

#include <stdio.h>
#define sqr(i) i*i
int main() {
printf ("%d %d",sqr(3),sqr(3+1));
return 0;
}

Answer 1

sqr (3) = 3*3 = 9
sqr (3+1) = 3+1*3+1 = 7

Answer 2

sqr
sqr (3) = 3*3 = 9

Its calculate like this
sqr (3+1) = 3+1*3+1 is equal to 7

Answer 3

https://www.sololearn.com/discuss/1874614/?ref=app

Answer 4

its not a function, its a macro.

Answer 5

i am a master c++ so do not try to callange me😉