c语言二级指针简单练习

char **str;
    char *p=(char *)malloc(1024);
    memset(p,0,1024);
    strcpy(p,"123w213");
    str=&p;
    cout<<*str<<endl;
    if(str)
    {
        free(str);
        str=NULL;
 
        cout<<"free"<<endl;
    }