Dynamic array?

I have to use a dynamic array and don't have a clue how to start this. The array is empty unless the user decides to input a number in it. I was thinking this but I am not sure of this will will work.

Code:

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#include <stdio.h>

int main ( void )

int SIZE = 0, a [ ], menu;


printf("Press one if you would like to add an intenger\n");
scanf("%d",&menu);

if ( menu == 1 ) {
SIZE++
scanf("%d",&int[SIZE]

)

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printf("What number would you like to delete\n");
scanf("%d",&key);
call linear search function
delete key; ( not sure how to do that )
call copy function to copy array a;

Any ideas are greatly appreciated.

Thanks.

Code:

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int *a = malloc ( howManyYouWant * sizeof *a );

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int * a ? is my array
how many you want ? is the elements

elements times index times the array. Haven't gotten into pointers yet so I am not sure if
*a is your pointer or what?

Is malloc a function out in some C library or did you just make it up?

Quote:

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Haven't gotten into pointers yet

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Start learning about pointers now.

Quote:

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Is malloc a function out in some C library or did you just make it up?

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It is from <stdlib.h>. You should use free(), also from <stdlib.h> when you are done, e.g., free(a).

Well, if you want a "dynamic array" (there is no real such thing in C natively), then yeah you need to learn pointers. Replace howManyYouWant with a variable or a const number that indicates how many elements should be in your "array".

For most cases, you can then treat "a" as an array (although it is technically not an array).

I am doing my own homework I am just asking questions.

The picture in all my posts is just simply a forum signature and meant for the kids that cause trouble here. It's not directed at you. Relax. You're doing fine. We'll make sure you know if you ask a stupid question. ;)

If a pointer points at an address and is an address how does that help me redefine the array of [ size + 1 ] elements or use my key to search for the intenger the user wishes to delete and redefine the array to [ size - 1 ] elements.

To resize the block of memory that malloc() returns, you can use realloc().