用C++实现字符的逆转

#include <iostream>
#include <Windows.h>
#include <string.h>
using namespace std;
void reverse(unsigned char *a)
{
  unsigned char *p1=a;
  unsigned char tmp[1024];
  unsigned char *p2;
  unsigned int len=strlen((char *)a);
  p2=len+tmp;//传的是地址，等式左边不能是指针
  *p2--='\0';
  while(*p1)
  {
    if(*p1<0x80)
    {
      *p2--=*p1++;
    }else
    {
      *(p2-1)=*p1++;
      *p2=*p1++;
      p2=p2-2;
    }
  }
  for(int i=0;i<len;i++)
  {
    a[i]=tmp[i];
  }
}
int main(void)
{
  unsigned char str[1024];
  cout<<"请输入你要转换的字符：";
  cin>>str;
  reverse(str);
  cout<<"转换的结果为："<<str<<endl;
  system("pause");
  return 0;
}