#include <stdio.h>


/* Though this code doesn't reflect exact C++ polymorphism(dynamic),
 i.e. same interface but different inplementation. Tried with different name
*/
void base(int dummy){
  printf("Recieving dummy from base - %d n", dummy);
}

void derive(int dummy){
  printf("Recieving dummy from der - %d n", dummy);
}

int main() {

 int dummy = 100;
 void (*funptr)(int);
 char ch;

 scanf("%c", &ch);
 
 /* Switch case to store the two interfaces address according to the input */
 switch (ch){
 case 'b':
  funptr=&base;
  break;
 case 'd':
  funptr=&derive;
  break;
 }

 /* Function pointer, which, is now, pointing to the function either "base" or "der". */
 
 funptr(dummy);

    return 0;
}