How to get the size of a double pointer array?

Question

How can I get the size of a dynamically allocated array of double pointers? (pointer to pointer datatype)

int tokencnt=1;
tokenv=(char**)malloc(sizeof(char*));

while(tokencnt<11){
 tokenv=(char**)realloc(tokenv,(tokencnt++)*sizeof(char*));
}

printf(*the size of tokenv*);

Record the size yourself and use it later. – iBug Feb 15 '19 at 02:47 — iBug, Feb 15 '19 at 02:47
`tokenv` lastly points to `11*sizeof(char*)` bytes. – chux - Reinstate Monica Feb 15 '19 at 02:52 — chux - Reinstate Monica, Feb 15 '19 at 02:52

score 2 · Accepted Answer · answered Feb 15 '19 at 02:49

2

sizeof does not work with alloc memory. If you malloc stuff you have to keep track of the size. The reason sizeof does not work, is because it will just give you the size of the pointer not the memory it points to.

answered Feb 15 '19 at 02:49

Manny_Mar

398
2
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How to get the size of a double pointer array?

1 Answers1