Some function pointer examples in C

functionPointer.c

#include <stdlib.h>
#include <stdio.h>

void fullMessage(char *name, void (*greeting)(char *)) {
  greeting(name);
  printf("Good luck in your life!\n");
}

void hello(char *name) {
  printf("Hello, %s! ", name);
}

void goodbye(char *name) {
  printf("Goodbye, %s! ", name);
}

int main(int argc, char *argv[]){

  char *name = argv[1];
  fullMessage(name, hello);
  fullMessage(name, goodbye);
  fullMessage(name, name[0] % 2 == 0 ? hello : goodbye);

  return 0;
}