Code-Bin #970 - Dec to bin

Dec to bin
Posted by: Aaron | November 19, 2010 @ 7:45pm

C++ Code

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

// function returns binary string... even with preceding zeros binary number is still correct.

string convertDecimalToBinary(int value);

int main()
{	
	int x = 0;
	string s2("NEGATIVE NUMBER EXITING");

cout << "Enter a decimal number (max 524288): ";
	cin >> x;
	cout << endl;
	if(convertDecimalToBinary(x) != s2)
	{
		cout << "The number in binary is: " 
			<< convertDecimalToBinary(x)<< endl; // call function...
	}
	else
	{
		cout << s2 << endl;
	}

system("pause");

return 0;
}

string convertDecimalToBinary(int value)
{
	
	const int AMOUNT = 20;

int one[AMOUNT];	
    int num_digits(0);
	int iTemp(0);
	string s2("NEGATIVE NUMBER EXITING");

iTemp = value;

if(iTemp < 0)
	{
	  return s2;
	}

while(iTemp > 0) 
    {
	   num_digits++;
	   iTemp /= 2;
    }

for(int i = num_digits; i > 0; i--)
	{
		one[i] = value % 2;
		value = value / 2;
	}
	
	string s1;

for (int i = 0; i <= num_digits; i++)
		{
			if (one[i] == 1)
			{
				s1.append("1");
			}
			else if (one[i] == 0)
			{
				s1.append("0");
			}
		}
	
	return s1;
}

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