Разный результат в Borland C++ 5.02 и Visual C++ 2012

#include <iostream>
#include <conio.h>
#include <fstream>
#include <limits.h>
using namespace std;

const char* ErrorRange = "\n!!!!!!!!!!! Limits of int value !!!!!!!!!!!\n";
inline  int     test(long int a)
     {
		 return ((a>>15)+1)&~1;
	 }

int input (int& k)
{ 
	ifstream my_inp ("CON");
	ofstream my_out ("CON");
    long int temp;
    my_inp >> temp;
	switch (my_inp.rdstate())
	{
		case ios::goodbit:
		case ios::eofbit :
		if (test (temp))
		{
			my_out << ErrorRange;
			return 1;;
		}
		k = temp;
        return 0;
		case ios::failbit:       
		case ios::badbit :
		my_out << "\n!!!!! Error input !!!!!\n";
		return 1;
	};
}

int     primC(int a, const int b, const int c, const int d)
{ 
	double z = (2.0*a+1.0*b*c)/(d-a);
	if (z > SHRT_MIN && z < SHRT_MAX) return z; 
	else
    { 
		cout << ErrorRange << "  Result x = " << z << endl;
		return SHRT_MIN;
     }
}

extern "C"
{   void prim (void);}

int X,a;

void main(void)
{   
char ch;
const int b=-333;
const int c= 1000;
const int d=-10;
int t=0;
do {
	X = 0;
	cout << "============== Test # " << ++t << " =====================" << endl;
	cout << "\n    x=(2*a+b*c)/(d-a);  int x,a,b=-333,c=1000,d=-10;" << endl;
	do
	{  
		cout<<"\n    Enter a [-32768..32767], a!= " << d << " ====> ";
		while (input(a));
	}
	while (d - a == 0 );
	cout << "\n You have entered the following value of a variable:  " << a << endl;
	X = primC(a, b, c, d);
	if (X!=SHRT_MIN)
	{
		cout << " Result (C++) x = " << X << endl;
		X = 0;
		cout << " Result (ASM) x = " << X << endl;
	}
	cout << "\n\nExit? - (y/n)\n";
	ch = getch();
	} 
	while (!(ch=='y' || ch =='Y'));
}