Question

• Assume the following type definition …
  • typedef int (*Pf) (int) ;
• Write a C function  apply such that …
  • the two inputs to function  apply are …
    1. pf, which is a pointer to a function and is of type  Pf
    2. an  int value N 
  • function  apply returns the result of applying to N the function pointed to by  pf  

Answer 1

Please find the code below::

#include <stdio.h>
typedef int (*Pf) (int);

//define function
//it will return number*10
int function(int i){
   return i*10;
}

//apply button
int apply(Pf functionPointer,int N){
   return functionPointer(N);
}

int main()
{

   //pointer to function
   Pf pointer = function;

   int i = apply(pointer,20);
   //should print 200
   printf("%d",i);
   return 0; //terminating
}

output: