编译错误，求大家帮帮忙

void reverse(char *pBegin, char *pEnd){

    if(pBegin == NULL || pEnd == NULL)

        return;

    while(pBegin < pEnd){

        char temp = *pBegin;

        *pBegin = *pEnd;   //编译到这地方失败，0xC0000005: 写入位置 0x0087DCAC 时发生访问冲突。

        *pEnd = temp;

        pBegin++;

		pEnd--;

    }

}

char* reverseSentence(char *pData){

	if(pData == NULL)

		return NULL;;

	char *pBegin = pData;

	char *pEnd = pData;

	while(*pEnd!='\0') 	pEnd++;

	pEnd--;

	//旋转句子

	reverse(pBegin,pEnd);

	//旋转单词

	pBegin = pData;

	pEnd = pData;

	while(*pBegin !='\0'){

		if(*pBegin == ' '){

			pBegin++;

			pEnd++;

		}else if(*pEnd == '\0' || *pEnd == ' '){

			reverse(pBegin,--pEnd);

			pBegin = ++pEnd;

		}else{

			pEnd++;

		}

	}

	return pData;

}