C | Functions | Question 5

Output?

#include <stdio.h> 
  
int main() 
{ 
    int (*ptr)(int ) = fun; 
    (*ptr)(3); 
    return 0; 
} 
  
int fun(int n) 
{ 
  for(;n > 0; n--) 
    printf("GeeksQuiz "); 
  return 0; 
} 

(A) GeeksQuiz GeeksQuiz GeeksQuiz
(B) GeeksQuiz GeeksQuiz
(C) Compiler Error
(D) Runtime Error

Answer: (C)

Explanation: The only problem with program is fun is not declared/defined before it is assigned to ptr. The following program works fine and prints “GeeksQuiz GeeksQuiz GeeksQuiz ”

int fun(int n);

int main()
{
    // ptr is a pointer to function fun()
    int (*ptr)(int ) = fun;

    // fun() called using pointer 
    (*ptr)(3);
    return 0;
}

int fun(int n)
{
  for(;n > 0; n--)
    printf("GeeksQuiz ");
}

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