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#include "stdafx.h"
#include <iostream>
#include <limits>
#include <math.h>
using namespace System;
using namespace std;
void ConvertByRecursion(long long n);
long long getDecimal();
long long getBinary();
long long BinaryToDecimal(long long);
int main()
{
long long n, result;
char choice;
cout << "DecimalBinary Conversions By Fedaa Musleh" << endl;
cout << "Welcome to the Decimal to Binary Converter!" << endl;
while (choice != 'Q'  'q')
{
cout << "Dec2Bin or Bin2Dec or Quit? (D/B/Q): ";
cin >> choice;
if (choice == 'D'  'd')
{
n = getDecimal();
while (n !=0)
{
ConvertByRecursion(n);
cout << endl << endl;
n = getDecimal();
}
}
else if (choice == 'B'  'b')
{
n = getBinary();
result = BinaryToDecimal(n);
cout << "\nTherefore the binary value is: " << result << endl;
cout << "\nThanks for using the decimal converter!" << endl;
}
}
cout << "\nThanks for using the DecimalBinary converter!" << endl;
system("Pause");
return 0;
}
long long getDecimal()
{
long long n;
bool baddata = false;
do
{
baddata = false;
cout << "Please enter your decimal value to convert (0 to quit): ";
cin >> n;
if(!cin.good())
{
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');
cout << "I could not decipher your input as a decimal value." << endl;
baddata = true;
}
else if (n < 0)
{
cout << "Please enter a nonnegative value." << endl;
baddata = true;
}
} while (baddata);
return n;
}
void ConvertByRecursion(long long n)
{
long long r;
long long newval;
r = n % 2;
newval = n / 2;
Console::WriteLine("Decimal {0,12:D} divided by 2 = {1, 12:D} w/Remainder of: {2,3:D} ", n, newval, r);
if (newval > 0)
{
ConvertByRecursion(newval);
}
else
{
cout << "\nTherefore, by recursion, the binary value of " << n << " is: ";
}
cout << r;
}
long long getBinary()
{
long long n;
bool baddata = false;
do
{
baddata = false;
cout << "Please enter your Binary value to convert to Decimal: (0 to Quit). ";
cin >> n;
if (!cin.good())
{
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');
cout << "I could not decipher your input as a decimal value " << endl;
baddata = true;
}
else if (n < 0)
{
cout << "Please enter a nonnegative value." << endl;
baddata = true;
}
} while (baddata);
return n;
}
long long BinaryToDecimal(long long n)
{
long long value = 0, i = 0, binarydigit, position;
while (n != 0)
{
binarydigit = n % 10;
position = pow(2,i);
value = value + binarydigit*position;
n = n/10;
i++;
}
return value;
}
 