C Programs of else if

Using else if statement, Wrtie a C program to read your age, if it is less than 100 then display message "you are pretty young", if age is equal to hundred the display message " you are old",  if age is greater than 100, then display message" you are really old".

#include <stdio.h>

#include <stdio.h>

void  main()                           

{

 clrscr();

 int age;

 printf( "Please enter your age" );

 scanf( "%d", &age );

 if ( age < 100 )

 {              

     printf ("You are pretty young!\n" );

  }

  else if ( age == 100 )

   {

     printf( "You are old\n" );      

    }

  else

   {

    printf( "You are really old\n" );    

    }

getch();

}