C++編程 進制轉換

#include <iostream>

using namespace std;

void decToBin(long x, char *a)

{

 ltoa(x, a, 2);

}

void hexToDec(char *a, long &x)

{

 x = strtol(a, (char**)NULL, 16);

}

int main()

{

 long x;

 char temp[255];

 cout << "輸入一個十進制數: ";

 cin >> x;

 decToBin(x, temp);

 cout << "轉換成二進制爲: " << temp << endl;

 cout << "輸入一個十六進制數: ";

 cin >> temp;

 hexToDec(temp, x);

 cout << "轉換爲十進制爲: " << x << endl;

 return 0;

}