C++编程 进制转换

#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 << "输入一个十进制数: ";

 cin >> x;

 decToBin(x, temp);

 cout << "转换成二进制为: " << temp << endl;

 cout << "输入一个十六进制数: ";

 cin >> temp;

 hexToDec(temp, x);

 cout << "转换为十进制为: " << x << endl;

 return 0;

}