GATE | GATE CS 2019 | Question 33

Consider the following C program:

#include<stdio.h>
 int main(){
  int arr[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 5}, *ip = arr + 4;

  printf("%d\n", ip[1]);

  return 0;
}

The number that will be displayed on execution of the program is _________ .
(A) 6
(B) 5
(C) 4
(D) segmentation error


Answer: (A)

Explanation:

#include<stdio.h>
 int main(){
  int arr[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 5}, *ip = arr + 4;

  printf("%d\n", ip[1]);

  return 0;
}

Note that index of array always start from 0 in C.

Initially ip pointer is pointing at (arr+4) or skipping starting first 4 position.

Now in the printf system call, 1 more position is to skip, So it will point to (arr+5) or skip 5 position from starting:

Hence, printf will print value at 6^th position, i.e., 6 will printed.

So, option (A) is correct.

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