How would you access struct values if they're in a struct array in another struct array in c?

Question

I have a struct in struct array inside another struct array and need to access values in this struct.

typedef struct unit
{
    bool isNot;
    char letter;
} unit;

typedef struct line
{
    unit *clause;
    int lineLength;      
} line;

typedef struct fullData
{
    line **table;
} fullData;

I am trying to access a unit struct i have created like so:

struct fullData Block;
struct Line lines;

and then to access:

 Block.table[i][j].letter

to get the letter in the unit struct.

This is kinda abridged, but the 2d array is massively populated.

Seems to me you have to do something like Block.table[i][j].clause[z].letter where z is the unit index you are trying to access. — André Santos
– André Santos, Commented Apr 25, 2020 at 2:34
@AndréSantos because its only a 2d array, would it be Block.table[i].clause[j] ? — liamkr
– liamkr, Commented Apr 25, 2020 at 2:39
Oh, if table it's a simple array of pointers it would be Block.table[i]->clause->letter then. table[i] is a line * so you dereference it with -> to get a line. Same logic for clause, which is a unit * and you have to dereference using the ->. — André Santos
– André Santos, Commented Apr 25, 2020 at 2:51
You hit the nail on the head of what i'm trying to. Ill make those changes now, thanks so much! — liamkr
– liamkr, Commented Apr 25, 2020 at 2:51

Cherubim · Accepted Answer · 2020-04-25 02:52:34Z

2

If I understand you correctly, I think you are trying to store letters in each cell of a table. Make the line **table as line *table. Then you can use Block->table[i]->clause[j]->letter to access letter at i and j. This makes more sense as a table is an array of lines and a line is an array of letters.

answered Apr 25, 2020 at 2:52

Cherubim

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