Converting numeric types to strings and strings to numeric types

// conversion.cpp : Defines the entry point for the console application.
//

#include "convert.h"

#include <iostream>
#include <string>

using namespace std;

int main()
{
	cout.precision(50);
	string choice;
	char * buffer = new char[1000];
	bool repeat;
	do {
		cout << "String to convert: " << endl;
		cin.getline(buffer,1000);
		if(stricmp(buffer,"q") == 0 || stricmp(buffer,"quit") == 0)
			break;
		do {
			repeat = false;
			cout << "Convert to a double (d), an integer (i), unsigned integer (ui), or a 64bit integer (i64): " << endl;
			cin >> choice;
			cin.ignore(2,'\n');
			try
			{
				if(choice == "d")
					cout << "Result of the conversion: " << Convert::ToDouble(buffer,strlen(buffer)) << "\r\n" << endl;
				else if(choice == "i")
					cout << "Result of the conversion: " << Convert::ToInteger<int>(buffer,strlen(buffer)) << "\r\n" << endl;
				else if(choice == "ui")
					cout << "Result of the conversion: " << Convert::ToInteger<unsigned int>(buffer,strlen(buffer)) << "\r\n" << endl;
				else if(choice == "i64")
					cout << "Result of the conversion: " << Convert::ToInteger<__int64>(buffer,strlen(buffer)) << "\r\n" << endl;
				else
					repeat = true;
			}
			catch(InvalidConversionException)
			{
				cout << "Invalid Conversion!" << endl;
			}
			
		} while(repeat);
	} while(true);
}