WAP function using a pointer to a function

/*WAP Invoking a function using a pointer to a function */

#include<stdio.h>
#include<conio.h>
main( )
{
 int  display( ) ;
 int  ( *func_ptr )( ) ;

 func_ptr = display ;  /* assign address of function */ 
 printf ( "\nAddress of function display is %u", func_ptr ) ;
 ( *func_ptr )( ) ;  /* invokes the function display( ) */
         getch();
}

int  display( )
{
 puts ( "\nLong live viruses!!" ) ;
}

Call main function in main function

Call main function in main function

#include "stdio.h"
#include "conio.h"
void display();
void  main()
{
 printf("NOMAN");
 display();
 getch();
 
}
void display()
{
 printf("Rehan");
 main();
}