Problem in C++ in Visual Studio 2010 Express

[sharkcoder]

Below i my code I am unsure of why an error is coming up and I dont know how to fix it. In C++ Visual Studio

 #include "stdafx.h"

#include<iostream>
using namespace std;
int main()
{
   double height, weight;
   double bmi;
   cout<<"Enter height in inches:";
   cin>>height;
   cout<<"Weight in pounds: ";
   cin>>weight;
   cout<<"Height="<<height<<"Weight="<<weight<<endl;
   bmi=( weight * 703 ) / ( height * height );
   cout<<"BMI is: "<<bmi<<endl;
   if(bmi<18.5)
       cout<<"Underweight"<<endl;
   else if(bmi>=18.5 && bmi<25)
       cout<<"Normal"<<endl;
   else if(bmi>=25 && bmi<30)
       cout<<"Överweight"<<endl;
   else
       cout<<"Obese";

   system("pause");
   return 0;
}


int _tmain(int argc, _TCHAR* argv[])
{
	return 0;
}

ERROR: 1>------ Build started: Project: hjl, Configuration: Debug Win32 ------
1> stdafx.cpp
1> hjl.cpp
1>LINK : warning LNK4067: ambiguous entry point; selected 'mainCRTStartup'
1>LINK : fatal error LNK1123: failure during conversion to COFF: file invalid or corrupt
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

[Little Bobby Tables]

well... you have two entry points.

[Jakee]

You have 2 main methods, you can only have 1 main method in C++ and a lot of OOP langauges.

[Little Bobby Tables]

you can only have 1 main method in C++ and a lot of OOP langauges.

why limit it to just oop? i have never seen a language that will let you do that, including c and assembly. why would you try to enter a house through two doors?