Program to convert binary number into dacimal number

/*Program to convert binary number  into dacimal number*/

#include<conio.h>

#include<stdio.h>

#include<math.h>

void main()

{

       int n,i,r,sum=0,x=0;

clrscr();

printf("Enter binary number:");

scanf("%d",&n);

while(n>0)

{

  r=n%10;

  sum=sum+r*pow(2,x);

  n=n/10;

  x++;

}

printf("dacimal number:%d",sum);

getch();

}