char* strcpy(char* strDest,const char* strSrc){    assert((strDest != NULL)&&(strSrc != NULL));    char* adress=strDest;//记录strDest的首位置    while(strSrc !='\0')    {        *strDest++=*strSrc++;//不是strDest++=strSrc++    }    return adress;//返回strDest的首位置}#define IS_FULL(ptr) (!(ptr))node* treecpy(node* original){    if(original==NULL)    {        return NULL;    }else{    node* newNode=(node*)malloc(sizeof(node));    if(IS_FULL(newNode)){    printf("The memory is full.\n");    exit(1);    }    newNode->data=original->data;    newNode->left=treecpy(original->left);    newNode->right=treecpy(original->right);    return newNode;    }}