WAP Binary to Decimal in C

This program will convert binary number (0 and 1) to decimal (0 to 9):

#include<stdio.h>
#include<conio.h>

void main()
{  
    long int binaryNumber, decimalNumber = 0, j = 1, remainder; 
    clrscr();
    printf("Enter any number any binary number: ");
    scanf("%ld",&binaryNumber); 

    while(binaryNumber != 0)
    {
        remainder = binaryNumber % 10;
        decimalNumber = decimalNumber + remainder * j;
        j = j * 2;
        binaryNumber = binaryNumber / 10;
    } 
    printf("Equivalent decimal value: %ld", decimalNumber);
    getch();
}

 Sample output: 

Enter any number any binary number: 1111
Equivalent decimal value: 15