C Program for Invoking a function using a pointer to a function

/* Invoking a function using a pointer to a function */
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( ) */
}
int  display( )
{
puts ( "\nLong live viruses!!" ) ;
}