I defined a structure as follows:

typedef struct CommandNode {
    int type;
    vector<string> command;
    CommandNode *next;
} CommandList,*CommandListNodes;

There is a vector in this structure, and now I want to use it as a linked list. I am not sure how to malloc the vector.

I used to malloc a 1000, and sometimes the following problems would occur:

malloc: *** error for object 0xffbbe8909090ffff: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug

In addition, I don’t know if it can be used like this:

    CommandListNodes listNodes = new CommandList;
    CommandListNodes p = listNodes;
    
    p->command.push_back("121212");
    
    p->type=100;
    p->next=new CommandList;
    
    p = p->next;
    
    p->command.push_back("343434");
    
    p->type=200;
    p->next=new CommandList;
    
    p = p->next;

And what is the difference between it and malloc? Currently, my understanding of this part of knowledge is relatively confusing. I haven’t found any particularly suitable content on the Internet. I hope some friends can sort it out. Thank you.