What's the error, is it to do with not finding WinMain entry point?

The below is some source code that makes a simple guessing game... I finally know how to get my applications to run in dos, but whenever I try to compile and build the following code, it comes up with 1 error. Here's what it allll does:
You're supposed to guess a number between 1 - 100, and if the user's guess is too big, it says so and vice versa. Once the user has guessed the correct number, it displays that he got it, and tells him/her how many tries it took to get it...
Please look at the below code, and tell me why it won't compile in Visual C++!!

// GUESS.C - An example of input driven event loops

// I N C L U D E S ////////////////////////////////////////////////////////////

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <graph.h>

// M A I N ////////////////////////////////////////////////////////////////////

void main(void)
{

int done=0, // exit flag
number, // the random nunber
num_tries=0, // number of tries
guess; // the players guess

unsigned int far *clock = (unsigned int far *)0x0000046CL; // pointer to clock

// SECTION 1 //////////////////////////////////////////////////////////////////

// print out introductory instructions

printf("\nI'm thinking of a number from 1-100.");
printf("\nTry and guess it!\n");

// seed the random number generator with the time

srand(*clock);

// choose a random number from 1-100

number = 1 + rand() % 100;

// SECTION 2 //////////////////////////////////////////////////////////////////

// main event loop

while(!done)
{

// SECTION 3 //////////////////////////////////////////////////////////////////

// query user for input (the event)

printf("\nWhat's your guess?");
scanf("%d",&guess);

// SECTION 4 //////////////////////////////////////////////////////////////////

// increment number of tries

num_tries++;

// process the event

if (guess > number)
printf("\nToo big!\n");
else
if (guess < number)
printf("\nToo small!\n");
else
{
// the user must have guessed the number

printf("\nYou guessed the number in %d tries!!!\n",num_tries);

// set the exit flag

done=1;

} // end else

} // end while

} // end main

[This message has been edited by Myopic Rhino (edited December 10, 1999).]

Yeah, in the future, make sure you describe the errors you're getting. But assuming that you have your project set as a Win32 Console Application, here's what's wrong.

First of all, you can't include graph.h. It's not part of the MSVC++ library, and your program doesn't need it anyway (I may be wrong here, but I believe it's the Microsoft C/Microsoft Visual C graphic header, but only for DOS).

Second, although it will compile, the way you are tring to get the clock is going to cause a crash. Delete the line unsigned int far *clock = (unsigned int far *)0x0000046CL; // pointer to clock entirely, include the header time.h, and change srand(*clock) to srand(time(NULL)). That should do it.

- Dave