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

int BinaryNum[50];
long ExpLoop;
long PlaceHolder;
long UserNumber;

int main()
{
    printf("Give me a Number to Convert to Binary.  Up to 65536_\n");
    scanf("%i", &UserNumber);
    for (ExpLoop = 15; ExpLoop > 0; ExpLoop--)
        BinaryNum[ExpLoop] = 0;
    for (ExpLoop = 15; ExpLoop >= 0; ExpLoop--)
    {  
        PlaceHolder = pow(2, ExpLoop);
        if (UserNumber >= PlaceHolder)
        {
            UserNumber -= PlaceHolder;
            BinaryNum[ExpLoop] = 1;
        }
    }
    for (ExpLoop = 15; ExpLoop >= 0; ExpLoop--)
        printf("%i", BinaryNum[ExpLoop]);
        
    for (ExpLoop = 0; ExpLoop <= 15; ExpLoop++)
    {
        if (BinaryNum[ExpLoop] == 1)
            UserNumber += pow(2, ExpLoop);
    }   
    printf("\n The Number You used was %i", UserNumber); 
    getch();
    return 0;
}