CODEWITHSUNDEEP
cpointers
user2314818
user2314818

Reputation: 51

Correct syntax for initialization of a pointer to an array

How can I initialize pointer to an array in C correctly

Here is my code

int (*data[10]);
int a[10];
data = &a[0]; /* gives a warning "int *" cannot be assigned to entity of "int (*)[10]" */

How can I get rid of this warning?

Upvotes: 4

Views: 232

Answers (4)

Roee Gavirel
Roee Gavirel

Reputation: 19443

int **data;
int a[10];
data = &a;

you can define data as other suggested: int (*date)[10];
but i believe that using it as a double pointer will make more seance the day you wish to change the size of that array from 10 to anything else !

Upvotes: -1

unwind
unwind

Reputation: 399949

I believe your parenthesis are wrong. You need:

int (*data)[10];

Note that you can use cdecl.org to get help with these things.

For your original code it says:

declare data as array 10 of pointer to int

For mine it says:

declare data as pointer to array 10 of int

Upvotes: 2

Jonathan Leffler
Jonathan Leffler

Reputation: 754450

  1. Declare a pointer to an array correctly:

    int (*data)[10];

  2. Assign a pointer to an array to it:

    int a[10];
data = &a;

Upvotes: 6

Some programmer dude
Some programmer dude

Reputation: 409356

The variable data is an array of pointer, and you try to assign to it a single pointer. If you want to declare data as a pointer to an array you have to re-arrange the parentheses:

int (*data)[10];

I recommend you read about the clockwise/spiral rule.

Upvotes: 1

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