Very simple C++ question.. (Binary > Decimal)

[TLEJ]

So I need to write a simple program that takes the user input (int) (Which will be in binary) , and outputs the decimal equivalent.

All we have learned so far is printf, scanf_s, if, do, while, int, and all the math functions.

We're suppose to do this WITHOUT the use of arrays, and WITH a loop.

I have no clue how to do this without arrays.. I know how to convert from binary to decimal and back on paper, but I don't know how to make the computer do this..

Any help would be greatly appreciated!

#include "stdafx.h"


int _tmain(int argc, _TCHAR* argv[])
{
int binary, number;
printf("Enter binary number: ");
scanf_s("%d", &binary);

while ()
{
	????????????
}

printf("Decimal equivalent is: %d", decimal);

       return(0);
}

EDIT: Steve, or any admins, if you see this, could we please change the BG color for code blocks? lol

Edited February 1, 2012 by TLEJ