#include<stdio.h>
#include<iostream.h>
double fun(double a,double b,double c)
{
double t;
if(a<b)
{t=a;a=b;b=t;}
if(a<c)
{ t=a;a=c;c=t;}
if(b<c)
{ t=b;b=c;c=t;}
return 1.0;
......................