C Programming · Question 13 · Hard

What will be the output of the following C program?

#include <stdio.h>
#define SQ(x) x * x

int main(void) {
    printf("%d", SQ(2 + 3));
    return 0;
}
  1. 25
  2. 11
  3. 13
  4. 10
Answer and explanation

Answer: B. 11

Explanation: Macros are plain text substitution, so SQ(2 + 3) becomes 2 + 3 * 2 + 3. By precedence this is 2 + 6 + 3 = 11. Writing ((x) * (x)) would give 25.

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