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Data Structures | Stack | Question 1

  • Difficulty Level : Easy
  • Last Updated : 08 Jan, 2013
Geek Week

Following is C like pseudo code of a function that takes a number as an argument, and uses a stack S to do processing.




void fun(int n)
{
    Stack S;  // Say it creates an empty stack S
    while (n > 0)
    {
      // This line pushes the value of n%2 to stack S
      push(&S, n%2);
  
      n = n/2;
    }
  
    // Run while Stack S is not empty
    while (!isEmpty(&S))
      printf("%d ", pop(&S)); // pop an element from S and print it
}

What does the above function do in general?
(A) Prints binary representation of n in reverse order
(B) Prints binary representation of n
(C) Prints the value of Logn
(D) Prints the value of Logn in reverse order


Answer: (B) Explanation: See method 2 of https://www.geeksforgeeks.org/binary-representation-of-a-given-number/ for explanation.

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