binary to decimal

/* program to convert binary to decimal*/
#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
	char ch;
	do {
	int n,digit=0,k=0,rem=0;
	clrscr();
	printf("\nEnter a binary number: ");
	scanf("%d",&n);
	while(n!=0)
	{
		rem=n%10;
		digit=digit+rem*pow(2,k);
		k++;
		n/=10;
	}
	printf("Converted Decimal:%d",digit);
	printf("\nDo you want to continue? (y/n)");
	scanf("%c",&ch);
	}
	while(ch == 'y'|| ch == 'Y');
	getch();
}