C++十进制转二进制,十六进制转十进制

#include
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 > x;
decToBin(x,temp);
cout