/* File: middle.c

   This program uses a function that returns 
   the middle number of three given integers.
*/

#include <stdio.h>
#include "genlib.h"
#include "simpio.h"

/* Function Prototype */
int middle(int, int, int) ;

main(){
   int n1, n2, n3, m ;

   printf("Enter first number: ") ;
   n1 = GetInteger() ;
   printf("Enter second number: ") ;
   n2 = GetInteger() ;
   printf("Enter third number: ") ;
   n3 = GetInteger() ;

   m = middle(n1, n2, n3) ;
   printf("The middle number is: %d\n", m) ;
}

int middle(int one, int two, int three) {
   
   /* one is the middle */
   if ( (two <= one) && (one <= three) ) return(one) ;
   if ( (three <= one) && (one <= two) ) return(one) ;

   /* two is the middle */
   if ( (one <= two) && (two <= three) ) return(two) ;
   if ( (three <= two) && (two <= one) ) return(two) ;

   /* three is the middle */
   if ( (one <= three) && (three <= two) ) return(three) ;
   if ( (two <= three) && (three <= one) ) return(three) ;
}