// Integrated Development Environment
// Visual C++
#include <iostream>
#include <cstdlib>
#define MAXBUFFER 1024
using namespace std;
//
const char* HexTable = "0123456789ABCDEF";
void DecToHex(char* BinBfr, int n, int sys);
//
int main(int argc, char** argv)
{
	char buffer[MAXBUFFER];
	int nbr;
	cout << "Input decimal: ", cin >> nbr;
	DecToHex(buffer, nbr, 2);
	cout << "Binary equivalent = " << buffer << endl;
	DecToHex(buffer, nbr, 8);
	cout << "Octal equivalent = " << buffer << endl;
	DecToHex(buffer, nbr, 16);
	cout << "Hexi equivalent = 0x" << buffer << endl;
	system("PAUSE");
	return (0);
}
//
void DecToHex(char* BinBfr, int n, int sys)
{
	int a = n, b = sys, c = 0;
	unsigned int f = 0;
	while ( a != 0 )
	{
		c = a % b;
		a /= b;
		BinBfr[f ++] = HexTable[c];
	}
	BinBfr[f] = '\0';
	//
	// strrev 字串反轉函式
	//
	strrev(BinBfr);
}