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POHow do I pass a pointer to a structure without angering the compiler?
 

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  1. POHow do I pass a pointer to a structure without angering the compiler?
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    <p>I'm attempting to compile a simple C++ program using MinGW 4.7.2, but am frustrated by a deluge of errors and warnings.</p> <pre><code>/*\ program.h \*/ typedef struct { int member0; int member1; int member2; int member3; } structure; void function(&amp;structure); </code></pre> <hr> <pre><code>/*\ program.cpp \*/ #include "program.h" int main(void) { structure *instance; function(instance); } void function(&amp;structure) { // nothing } </code></pre> <p><code>function</code> takes the address of a <code>structure</code>. Pointer <code>instance</code> contains the address of a <code>structure</code> which is then passed to <code>function</code>.</p> <p>Simple, but the compiler is not happy.</p> <pre><code>g++ program.cpp In file included from program.cpp:1:0: program.h:8:14: error: variable or field 'function' declared void program.h:8:25: error: expected primary-expression before ')' token program.cpp: In function 'int main()': program.cpp:5:19: error: 'function' was not declared in this scope program.cpp: At global scope: program.cpp:8:14: error: variable or field 'function' declared void program.cpp:8:25: error: expected primary-expression before ')' token </code></pre> <p>What is <code>variable or field 'function' declared void</code> trying to tell me? <code>function</code> is obviously <code>void</code>, but how is that bad? I've spent several hours searching for these answers, but without success.</p> <p>How can I pass a pointer to a structure without making the compiler vomit?</p>
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    1. USJohn McClane
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      1. VTDownMod
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    1. COYou badly need a book which teaches the basics. Even one of those learn C or learn C++ in 2 minutes should help.
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    2. COI've read _The C Programming Language_ along with many other documents and tutorials, though I've read nothing on C++. Which parts of my program exhibit bad practice?
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      1. USJohn McClane
    3. COThere is no bad practice. It's just wrong stuff. Very basic syntax is wrong. Why don't start by copying programs from the book?
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