Keil forum create variable length array

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create variable length array

mikepl over 1 year ago

hello, i need to create variable length array. If i try to create this, i have infinite or empty array. I know that variable length array(vla) work after c99, but in documentation written that can be added --vla flag. I used c90 and --vla flag (option for target->c/c++>misc controls) and have error " --vla is underfinded". I tried use c99 standart where vla included, and i have empty (without length) array. If i use length variable from define or use int bytes[5] directly i have correct result. But i can not use define all time, because i need variable array. In eclipse it works, in keil with different standarts and versions of compiler i can't create variable length array.

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#include "stdlib.h"
#define k 5
int main(void)
{
    int i;
    
    int ind=0;
    for (i=0;i<=5;i++){
    ind=i;
    }
    int bytes[ind]; //work if k or 5 or 0x05
return 0;
}
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#include "stdlib.h"
#define k 5
int main(void)
{
    int i;
	
	int ind=0;
	for (i=0;i<=5;i++){
	ind=i;
	}
    int bytes[ind]; //work if k or 5 or 0x05
return 0;
}