GATE | GATE CS 2010 | Question 10

What does the following program print?

C

#include
void f(int *p, int *q)
{
  p = q;
 *p = 2;
}
int i = 0, j = 1;
int main()
{
  f(&i, &j);
  printf(\"%d %d \\n\", i, j);
  getchar();
  return 0;
}

(A)

2 2

(B)

2 1

(C)

0 1

(D)

0 2 

Answer: (D)

Explanation:

See below comments for explanation. 

/* p points to i and q points to j */
void f(int *p, int *q)
{
  p = q;    /* p also points to j now */
 *p = 2;   /* Value of j is changed to 2 now */
}

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