CODEWITHSUNDEEP
cpointersdynamicmallocstructure
mmajewsk
mmajewsk

Reputation: 99

Two dimensional array of pointers to structure (dynamic)

so i'm working on a piece of code that should use a table of pointers to structures; here you have that structure type

 #define liczbafunkcji 5
 #define wielkosclasu 0
 typedef struct drzewo typ;
 struct drzewo {

    typ *right;
    typ *left;
    typ *up;
    char znak;
    unsigned int instrukcje;
    unsigned int opcje;
    float value;
  };
 typ * t[wielkosclasu][rozmiar];

and here you have an assigning function

void przydziel(void)
{
int i,g;

for(i=0;i<wielkosclasu;i++)
{
    for(g=0;g<rozmiar;i++)
    {
            t[i][g]=(typ*)malloc(sizeof(typ));
    }
}
}

So when i'm doing something like that (*t[numerdrzewa][0]).up=NULL; it goes with " SIGSEGV, Segmentation fault." (checked with gdb) in that line, and i'm not sure what is wrong.

Upvotes: 0

Views: 204

Answers (1)

zch
zch

Reputation: 15278

wielkosclasu is 0, so the array is empty and t[numerdrzewa][0] would always be outside the array. Also, your function does nothing.

Upvotes: 1

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