Sunbelt Computer Software

PL/B Language Development and Support

exercism-cpp/binary/binary.cpp at master · johnngugi/exercism-cpp · GitHub

#include "binary.h"

#include <cmath>

#include <cctype>

using namespace std;

namespace binary

{

int convert(string n)

{

if (isalpha(n[n.length()-1]))

{

return 0;

}

int sum = 0;

int power = 0;

long int n_to_int = stol(n);

while(n_to_int > 0)

{

int last = n_to_int%10;

sum += last * pow(2, power);

n_to_int /= 10;

++power;

}

return sum;

}