StackOverflow2013

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PO
primarykey
Id
18333848
data
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0
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11
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2013-08-20T11:27:58.197
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2013-08-20T12:28:32.443
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2013-08-20T12:28:32.443
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1394283
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1394283
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18333765
PostTypeId
2
Score
6
ViewCount
0
LastEditorDisplayName
text
Body
If you are in C++, just do : <pre><code>struct Coder { float **data; }; typedef Coder *AUTO; </code></pre> Also you have to be sure that the <code>AUTO</code> declaration is done after the declaration of your <code>struct</code> or you can forward-declare your <code>struct</code>. <hr> Also, it is possible that <a href="http://www.cplusplus.com/reference/cstring/NULL/" rel="nofollow"><code>NULL</code></a> is undefined. You can replace it by <code>0</code> or just look at the link I just gave you. Here is a <a href="http://ideone.com/7ToQT4" rel="nofollow">live example</a>. <hr> EDIT : The code you gave us cannot work : <pre><code>#include <tchar.h> #include <stdlib.h> #include <string.h> #include <math.h> #include <conio.h> #include <iostream> struct Coder { float **data; // 2-D matrix }; typedef Coder *AUTO; AUTO myFeatures = new Coder; myFeatures->data = NULL; // Forbidden int main (){ myFeatures->data = new float *[2]; myFeatures->data[0] = new float [2]; } </code></pre> You can only have declaration in namespace scope, not expression like that. In §7.3.1/1 of the standard : <blockquote> namespace-body:      declaration-seqopt </blockquote> which says the namespace-body can optionally contain only declaration. This code will work : <pre><code>// Your includes struct Coder { Coder() : data(NULL) {} // Constructor who initialize data to NULL // via the member-initialization-list float **data; // 2-D matrix }; typedef Coder *AUTO; AUTO myFeatures = new Coder; // Do you want to keep it in global ?? // It's not a really good design int main (){ // You should put your declaration here. // myFeatures->data = NULL; useless now myFeatures->data = new float *[2]; myFeatures->data[0] = new float [2]; } </code></pre>
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1. POInitial typedef struct pointer (C/C++)
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1. USPierre Fourgeaud
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1. USPierre Fourgeaud
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