字符串循环右移问题？

 

#include <iostream>
using namespace std;
#include <stdio.h>
#include <string.h>

void Reverse(char *str, int m, int n)
{
 char temp;
 char *front = str +m;
 char *rear = str + n;
 while(front<rear)
 {
  temp = *front;
  *front = *rear;
  *rear = temp;
  front++;
  rear--;
 }
}

void LoopMove(char *pStr, int steps)
{
 int len = strlen(pStr);
 Reverse(pStr,0,len-steps-1);
 Reverse(pStr,len-steps,len-1);
 Reverse(pStr,0,len-1);
 cout<<pStr<<endl;
}

int main()
{
 //char* pStr = "abcdefghi";
 char pStr[] = "abcdefghi";
 int steps = 2;
 LoopMove(pStr, steps);//output:hiabcdefg
 return 0;
}

当主函数中字符串用数组表示时，代码可以正确运行，但是当主函数中数组用字符指针表示时，程序出错，unhandled exception, c0000005 access violation.不知哪位大牛能

分析下原因？