十进制转化为二进制和十六进制

#include
#include
using namespace std;

bitset<32> GetBitSet(int num)
{
 bitset<32> bs(num);
 return bs;
}

char *Get16string(int num)
{
 char *buffer = new char[11];
 char *bufferAddr = buffer;

 buffer[0] = '0';
 buffer[1] = 'x';
 buffer[10] = '\0';
 buffer = buffer + 2;
 for(int i = 0; i < 8; i++)
 {
  buffer[i] = (char)(num << 4*i >> 28);
  if((buffer[i] & (1 << 7)) != 0)
   buffer[i] = buffer[i] + 16;
  if(buffer[i] < 10)
   buffer[i] += 48;
  else
   buffer[i] += 55;
 }

 return bufferAddr;
}

int main()
{
 int num = 456789;
 bitset<32> bs;
 bs = GetBitSet(num);
 char *num16String = Get16string(num);
 cout< 
 return 0;
}