Code is having logical errors. Please help!

Question

I had made a code to convert a binary number to decimal but i think some logical errors are there. Can you help me out? I am just a beginner, would be glad if you help.

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
int bin,pwr=1,result=0;
cout<<"Type only binary value";
cin>>bin;
while (bin>=0)
{ if (bin%10==1)
{result+=pow(2,pwr);}
else if (bin%10==0)
{result+=0;}
bin=bin/10;
pwr++;
}
cout<<result;
return 0;
}

Answer 1

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
int bin, pwr = 0, result = 0;

cin >> bin;
cout << "Binary value: " << bin << endl;

while(bin > 0)
{
int rem = bin % 10;
if(rem == 1)
{
int sq = pow(2, pwr);
result += sq;
}

bin /= 10;
pwr++;
}

cout << "\nDecimal value: " << result << endl;
return 0;
}