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GATE | GATE-CS-2016 (Set 1) | Question 25

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Consider the following C program. 

C




#include<stdio.h>
void mystery(int *ptra, int *ptrb)
{
   int *temp;
   temp = ptrb;
   ptrb = ptra;
   ptra = temp;
}
int main()
{
    int a=2016, b=0, c=4, d=42;
    mystery(&a, &b);
    if (a < c)
       mystery(&c, &a);
    mystery(&a, &d);
    printf(\"%d", a);
}


The output of the program _____________   Note : This question was asked as Numerical Answer Type.

(A)

2016

(B)

0

(C)

4

(D)

8


Answer: (A)

Explanation:

Note that a and d are not swapped as the function mystery() doesn\’t change values, but pointers which are local to the function. 


Quiz of this Question
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Last Updated : 12 Aug, 2021
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