I Need Help Writing A Program Using An Array Of Pointers!
I need to write an inventory program to maintain a lost of DVD movies by using an array of pointers. Each pointer points to a character array storing a movie title of up to 30 characters.
The program should:
Output the list of movies
Delete a title from the list by entering command
d
n (n indicates which title to delete)
ex: d 3 will delete the third title
Output the final list
Any help would be appreciated. Thanks
[email protected]
So... what type of list are you going to use (or are capable of using)? An array, a link list, a tree .....
I suggest you research them, and decide on one to use.
Also, if it's an inventory, you'll probably want to use structs too.
Code:#define TOTAL_BOOKS 1000 struct item { int NumberInStock; char Name[100]; char Author[50]; }; struct item ItemArray[TOTAL_BOOKS];
When all else fails, read the instructions.
If you're posting code, use code tags: [code] /* insert code here */ [/code]
#define
Hi Hammer!Originally posted by Hammer
So... what type of list are you going to use (or are capable of using)? An array, a link list, a tree .....
I suggest you research them, and decide on one to use.
Also, if it's an inventory, you'll probably want to use structs too.
Code:#define TOTAL_BOOKS 1000 struct item { int NumberInStock; char Name[100]; char Author[50]; }; struct item ItemArray[TOTAL_BOOKS];
#define.... is it like const???
Could you please explain little more about it or suggest me to look any reference you know???
The short and easy to understand explination of #define is this:
a variabelt hat is #defined can be of any type and it is a constant throughout yoru program. that is to say, if you do #define MYASS "BIG"
You CANNOT do MYASS[1] = '2'; somewher ein your program.
A value that is defined is not accessed like a regular variable, the value of the the #define'd object is basically 'pasted' wherever you put it by the compiler. So
printf("%s", MYASS);
is replaced by your compiler with
printf("%s", "BIG");
That is the quick and dirty explination, #define's can get very complex and sometimes gross.
#define is used to, oddly enough, define something. This is a preprocessor directive. That is to say, before the code is compiled, the compiler goes looking for all of the "#define" stuff. When it comes across it, it does a "search and replace" to fill in the appropriate text.
Example:
#define cat dog
Anywhere you use cat in your program, outside of a string, the preprocessor will replace that text with dog.
Like so:
The end result is that 'cat' is replaced with the word 'dog'.Code:#define cat dog int main( void ) { int cat; cat = 1; return 0; }
Now here this isn't very handy. We could do this however:
#define SIZE 10
And now we can make an array:
char myarray[SIZE];
char int[SIZE];
So it does have its uses...
Quzah.
Hope is the first step on the road to disappointment.
You can't with the example you have provided, but we could do:Originally posted by orbitz
#define MYASS "BIG"
You CANNOT do MYASS[1] = '2'; somewher ein your program.
#define ALPHA bravo
int ALPHA;
ALPHA = 10;
It all depends on how you use it. You used it to define a string, I used it to define a variable name.
Quzah.
Hope is the first step on the road to disappointment.
