Decimal to Binary

Write a C program which converts from binary to decimal?

/* C Program which converts from binary to decimal */
#include <stdio.h>
int main()
{      
        int num;
        int binary[25];
        int index = 0;
        int i;
        printf("Enter The Number : ");
        scanf("%d",&num);
        while( num > 0){
             binary[index++] = num%2;
             num = num/2;
        }
        /* print in reverse order*/
        printf("Binary Number is : ");
        for(i = index-1; i>=      0; i--){
              printf("%d ",binary[i]);
        }
        printf("\n");
       getch();
       return 0;
}