C Program to Convert Binary Number to Decimal

//C program to convert binary to decimal
#include <stdio.h>
#include <math.h>
int convert(long long n);
int main()
{
    long long n;
    printf("Enter a binary number: ");
    scanf("%d", &n);
    printf("%d in binary = %d in decimal", n, convert(n));
    return 0;
}
int convert(long long n)
{
    int decim = 0, i = 0, remr;
    while (n!=0)
    {
        remr = n%10;
        n /= 10;
        decim += remr*pow(2,i);
        ++i;
    }
    return decim;
}