Convert Binary to Decimal number c program

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

int binary_decimal(int n);

int main()
{
    int n;
    char c;

    printf("Enter a binary number: ");
    scanf("%d", &n);
    printf("%d in binary = %d in decimal", n, binary_decimal(n));

    return 0;
}

//Function to convert binary to decimal.
int binary_decimal(int n)
{
    int decimal = 0, i = 0, rem;
    while (n != 0)
    {
        rem = n % 10;
        n /= 10;
        decimal += rem * pow(2, i);
        ++i;
    }
    return decimal;
}

Output : 

Enter a binary number: 1110
1110 in binary = 14 in decimal