Variable Array Size From Command Line Argument?

Hey guys,

I am wondering if it is possible to receive a value from a command line that creates an array of that size?

Is the more 'sophisticated' method of doing this to use malloc()?

Thanks.

Quote:

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Originally Posted by Cell

I am wondering if it is possible to receive a value from a command line that creates an array of that size?

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Yes, it is possible.

Quote:

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Originally Posted by Cell

Is the more 'sophisticated' method of doing this to use malloc()?

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I am not sure how 'sophisticated' it is, but it is the usual way. In C99 you also have the option of variable length arrays.

Thank you.

So if I am using a VLA, is it as simple as:

Code:

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int TEST;
       
printf("Message size?\n");
           
scanf("%d", &TEST);
 
int string[TEST];

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Because I have been having some issues using this.

Thanks.

Quote:

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Originally Posted by Cell

So if I am using a VLA, is it as simple as:

Because I have been having some issues using this.

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yes.

Are you compiling in the C99 mode?

Is C99 mode standard in gcc?

If it compiles without warnings with you scattering variables throughout your code like that, then yes, it's in C99 (or some bastardized) mode.

Quzah.

Quote:

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Originally Posted by Cell

Is C99 mode standard in gcc?

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The option to force GCC to use the C99 standard is "-std=c99" I believe.
You should confirm with your man pages.