Binario-Decimale :

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


int main()
{
int x, dec, bin;
cout<<"Inserisci un numero binario: ";
cin >> bin;
x=1;
dec=0;

for (x=1,dec=0;bin;x*=2,bin/=10)
dec+=(bin%10)*x;
cout <<"Numero in decimale : " << dec << endl;

system("pause");
return 0;
}