Question

There is one small error in the following flip routine. Find out which line it is on.

void flip(int arr[], int i)
	2	{
	3	      int t, init = 0;
	4	      while (init < i)
	5	      {
	6		    t = arr[init];
	7		    arr[i] = arr[init] ;
	8		    arr[i] = t;
	9		    init++;
	10		    i--;
	11	      }
	12	}

a) Line 3
b) Line 5
c) Line 7
d) Line 9

Answer 1

Answer: c
Explanation: After initialization of the array titled arr; for each while loop iteration of increasing init, we should make arr[init]=arr[i]. This makes sure that the changes will be made in order to flip the order of the array that was to be flipped. Here in line 7 it has been written in reverse and is incorrect.