C Program to Print Binary to Decimal Number

program:

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

output: