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GATE CSE 2010 | Question: 35

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27 votes
27 votes

What is the value printed by the following C program?

#include<stdio.h>

int f(int *a, int n)
{
    if (n <= 0) return 0;
    else if (*a % 2 == 0) return *a+f(a+1, n-1);
    else return *a - f(a+1, n-1);
}

int main()
{
    int a[] = {12, 7, 13, 4, 11, 6};
    printf("%d", f(a, 6));
    return 0;
}
  1. $-9$
  2. $5$
  3. $15$
  4. $19$
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5 Answers

Best answer
27 votes
27 votes

Suppose $int$ array takes $4$ bytes for each element and stored at base address $100$.

Follow below image. Red color shows the return value.



So, $15$ is the answer.

Correct Answer: $C$

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32 votes
It will print
$12 + ( 7 - (13 - (4 + (11 - ( 6 + 0)))))$
$\quad = 12 + (7 - (13 - ( 4 + ( 11 -6)))))$
$\quad= 12 + 7 - 13 + 9$
$\quad= 15$
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