Binary_to_decimal_conversion

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

int main()
{
    int decimalnum = 0, temp = 0, remainder;
    long binarynum;
    printf("Enter a binary number: ");
    scanf("%ld", &binarynum);
    while (binarynum!=0)
    {
        remainder = binarynum % 10;
        binarynum = binarynum / 10;
        decimalnum = decimalnum + remainder*pow(2,temp);
        temp++;
    }

    printf("Equivalent decimal number is: %d", decimalnum);
    return 0;
}