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Editorial Team
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Asked: 2026-06-02T07:51:25+00:00

I have a struct that contains two pointers, < head, iterator > both pointers

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I have a struct that contains two pointers, < head, iterator > both pointers point to another struct – Node.

typedef struct Map_t {

    Node head;
    Node iterator;

} Map_t;

typedef struct Node_t* Node;

struct Node_t {
    MapDataElement Data;
    MapKeyElement Key;

    struct Node_t *next;
};

typedef struct Map_t *Map;

I want to make the iterator pointer point to the same position as head. heres Debbuging before and after runnning the line:

Before line
enter image description here

After line
enter image description here

As you can see, after running the line, the map->iterator still points to 0x0.. Why is that?

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1 Answer

  1. Editorial Team

    It appears that the pointer assignment has occurred as evidenced by your second picture, which highlights the changes to the members of map->iterator. I’d imagine the method runs to completion, returning the pointer 0x9918f0.

    This leads me to believe that you’re not actually experiencing a failure in pointer assignment, but merely a failure in your debugger (Eclipse) displaying an updated value. This could be due to a bug in Eclipse or it could be due to insufficient debugging information available to Eclipse. It is difficult to say with only the example given.

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