How to convert pointer array to char array?

Question

I have this:

typedef struct nodebase{
  char name[254];
  char sex;
  int  clientnum;
  int  cellphone;
  struct nodebase *next;
  struct nodebase *encoding;
} clientdata;

I have added clientdata *curr[]; in seperate function. The reason why I made *curr into *curr[] instead is that this client data will be stored in a .txt file. So I came up with singly linked-list to read all the data and when the program fscanf every 5th variable, I will add 1 to clientcounter.

So, the *curr[] will be *curr[clientcounter].

Now, I need to convert this pointer array into char array named temp[clientcounter] because char array is needed to evaluate something else later in the code.

I came up with this code below:(Using Tiny C on Windows)

void loaded_data_transfer(clientdata *curr,clientdata temp[],int clientcounter)
{
clientdata temp[] = {0};

temp[clientcounter].name = curr[clientcounter]->name;
temp[clientcounter].sex = curr[clientcounter]->sex;
temp[clientcounter].clientnum = curr[clientcounter]->clientnum;
temp[clientcounter].cellphone = curr[clientcounter]->cellphone;

}

The problem is, Tiny C is giving me an error: lvalue expected at temp[clientcounter.name = ... part. Can anyone tell me what did I do wrong?

And if anyone knows a better way to keep track of the curr of clientdata by using counter and by using singly linked-list, please let me know.

You say that curr is clientdata *curr[] in main, but the curr in your function is clientdata *curr, what's up with that? — us2012
– us2012, Commented Oct 2, 2013 at 10:57
Why do you create second variable clientdata temp[] = {0}; when you already have one temp on function parameter list? — user694733
– user694733, Commented Oct 2, 2013 at 11:03
@user694733 I thought clientdata temp[] = {0}; would initialize the temp in function parameter list? — Beginner C
– Beginner C, Commented Oct 2, 2013 at 11:05
@BeginnerC: No. You're declaring and initialising a new variable. You cannot initialise something that already exists. The parameter is initialised at the call site (ideally). — Lightness Races in Orbit
– Lightness Races in Orbit, Commented Oct 2, 2013 at 11:40

fkl · Accepted Answer · 2013-10-02 10:55:53Z

2

You cannot assign an array to another. You should use strcpy or strncpy

strcpy(temp[clientcounter].name, curr[clientcounter]->name);

answered Oct 2, 2013 at 10:55

fkl

5,5554 gold badges32 silver badges71 bronze badges

Sign up to request clarification or add additional context in comments.

7 Comments

Beginner C Over a year ago

How about assigning int, instead of char ?

user694733 Over a year ago

@BeginnerC Problem here is not int or char. It is that name is an array.

fkl Over a year ago

Oh i thought he meant using a single int instead of a char array. I guess i wrote clearly that you cannot copy arrays this way, irrespective of their types.

Beginner C Over a year ago

@user694733 I was just asking if there is a way to assign int

RedX Over a year ago

@BeginnerC See this list.

|

user694733 · Accepted Answer · 2013-10-02 11:38:01Z

1

Maybe you meant to copy the entire struct:

void loaded_data_transfer(clientdata * curr, clientdata temp[], int clientcounter)
{
    temp[clientcounter] = *curr; // Copy entire struct
}

It should work, because your struct doesn't any pointer members.

I am assuming you use it like this

clientdata * curr[CURR_SIZE];
clientdata temp[TEMP_SIZE];
/* init curr elements here */
loaded_data_transfer(*curr[clientcounter], temp, clientcounter);

edited Oct 2, 2013 at 11:38

answered Oct 2, 2013 at 11:08

user694733

16.3k4 gold badges48 silver badges75 bronze badges

2 Comments

fkl Over a year ago

You better include the function call as well in code. Then i can help with the precise fix

user694733 Over a year ago

@BeginnerC I had i little misunderstaning what function parameters types you meant to use. I updated my answer.

willus · Accepted Answer · 2013-10-02 11:02:43Z

0

Also, your declaration should be:

void loaded_data_transfer(clientdata *curr[],...

answered Oct 2, 2013 at 11:02

willus

5013 silver badges7 bronze badges

Collectives™ on Stack Overflow

How to convert pointer array to char array?

3 Answers 3

7 Comments

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

7 Comments

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related