Why I cannot use VLA when writing C codes in Visual Studio 2017?
0
Just some really simple codes, as shown below.
int row = 4;
int column = 5;
int val_arr[row][column];
Could you please help me solve this problem? Thanks very much!
c visual-studio c99
|
show 15 more comments
0
Just some really simple codes, as shown below.
int row = 4;
int column = 5;
int val_arr[row][column];
Could you please help me solve this problem? Thanks very much!
c visual-studio c99
1
Microsoft don't have a truly conforming C compiler. Specifically, no C99 compiler. You are limited to to C89 features with MS.
– StoryTeller
Nov 25 '18 at 8:29
3
AFAIK, VLAs are optional after C99. In any case, using VLAs is, IMHO, not a good habit. Almost as bad as alloca().
– GermanNerd
Nov 25 '18 at 8:34
1
@SouravGhosh - Well.. MS supports alloca. So I daresay that particular utility fares better than VLA's in that regard.
– StoryTeller
Nov 25 '18 at 9:16
3
Those concerns apply to any use of the stack, not just VLAs
– M.M
Nov 25 '18 at 9:53
3
Also it is useful to be able to use variably-modified type for dynamic allocation
– M.M
Nov 25 '18 at 10:02
|
show 15 more comments
0
0
0
Just some really simple codes, as shown below.
int row = 4;
int column = 5;
int val_arr[row][column];
Could you please help me solve this problem? Thanks very much!
c visual-studio c99
Just some really simple codes, as shown below.
int row = 4;
int column = 5;
int val_arr[row][column];
Could you please help me solve this problem? Thanks very much!
c visual-studio c99
c visual-studio c99
asked Nov 25 '18 at 8:24
user10298899
1
Microsoft don't have a truly conforming C compiler. Specifically, no C99 compiler. You are limited to to C89 features with MS.
– StoryTeller
Nov 25 '18 at 8:29
3
AFAIK, VLAs are optional after C99. In any case, using VLAs is, IMHO, not a good habit. Almost as bad as alloca().
– GermanNerd
Nov 25 '18 at 8:34
1
@SouravGhosh - Well.. MS supports alloca. So I daresay that particular utility fares better than VLA's in that regard.
– StoryTeller
Nov 25 '18 at 9:16
3
Those concerns apply to any use of the stack, not just VLAs
– M.M
Nov 25 '18 at 9:53
3
Also it is useful to be able to use variably-modified type for dynamic allocation
– M.M
Nov 25 '18 at 10:02
|
show 15 more comments
1
Microsoft don't have a truly conforming C compiler. Specifically, no C99 compiler. You are limited to to C89 features with MS.
– StoryTeller
Nov 25 '18 at 8:29
3
AFAIK, VLAs are optional after C99. In any case, using VLAs is, IMHO, not a good habit. Almost as bad as alloca().
– GermanNerd
Nov 25 '18 at 8:34
1
@SouravGhosh - Well.. MS supports alloca. So I daresay that particular utility fares better than VLA's in that regard.
– StoryTeller
Nov 25 '18 at 9:16
3
Those concerns apply to any use of the stack, not just VLAs
– M.M
Nov 25 '18 at 9:53
3
Also it is useful to be able to use variably-modified type for dynamic allocation
– M.M
Nov 25 '18 at 10:02
1
1
Microsoft don't have a truly conforming C compiler. Specifically, no C99 compiler. You are limited to to C89 features with MS.
– StoryTeller
Nov 25 '18 at 8:29
Microsoft don't have a truly conforming C compiler. Specifically, no C99 compiler. You are limited to to C89 features with MS.
– StoryTeller
Nov 25 '18 at 8:29
3
3
AFAIK, VLAs are optional after C99. In any case, using VLAs is, IMHO, not a good habit. Almost as bad as alloca().
– GermanNerd
Nov 25 '18 at 8:34
AFAIK, VLAs are optional after C99. In any case, using VLAs is, IMHO, not a good habit. Almost as bad as alloca().
– GermanNerd
Nov 25 '18 at 8:34
1
1
@SouravGhosh - Well.. MS supports alloca. So I daresay that particular utility fares better than VLA's in that regard.
– StoryTeller
Nov 25 '18 at 9:16
@SouravGhosh - Well.. MS supports alloca. So I daresay that particular utility fares better than VLA's in that regard.
– StoryTeller
Nov 25 '18 at 9:16
3
3
Those concerns apply to any use of the stack, not just VLAs
– M.M
Nov 25 '18 at 9:53
Those concerns apply to any use of the stack, not just VLAs
– M.M
Nov 25 '18 at 9:53
3
3
Also it is useful to be able to use variably-modified type for dynamic allocation
– M.M
Nov 25 '18 at 10:02
Also it is useful to be able to use variably-modified type for dynamic allocation
– M.M
Nov 25 '18 at 10:02
|
show 15 more comments
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1
Microsoft don't have a truly conforming C compiler. Specifically, no C99 compiler. You are limited to to C89 features with MS.
– StoryTeller
Nov 25 '18 at 8:29
3
AFAIK, VLAs are optional after C99. In any case, using VLAs is, IMHO, not a good habit. Almost as bad as alloca().
– GermanNerd
Nov 25 '18 at 8:34
1
@SouravGhosh - Well.. MS supports alloca. So I daresay that particular utility fares better than VLA's in that regard.
– StoryTeller
Nov 25 '18 at 9:16
3
Those concerns apply to any use of the stack, not just VLAs
– M.M
Nov 25 '18 at 9:53
3
Also it is useful to be able to use variably-modified type for dynamic allocation
– M.M
Nov 25 '18 at 10:02