Something

#include <stdio.h>	
                     /* Most important pa
int main()       rt of the program!
*/
{
    int age;                          /* Need a variable... */
  
    printf( "Please enter your age" );  /* Asks for age */
    scanf( "%d", &age );                 /* The input is put in age */
    if ( age < 100 ) {                  /* If the age is less than 100 */
     printf ("You are pretty young!\n" ); /* Just to show you it works... */
  }
  else if ( age == 100 ) {            /* I use else just to show an example */ 
     printf( "You are old\n" );       
  }
  else {
    printf( "You are really old\n" );     /* Executed if no other statement is
    */
  }
  return 0;
}