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POCompilation error involving functions being declared twice and the types being different
 

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  1. POCompilation error involving functions being declared twice and the types being different
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    <p>When I try to compile my simple starter program, I get the following error:</p> <pre><code>In file included from processcommand.c:1: processcommand.h:5: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token processcommand.c:3: error: conflicting types for 'getinput' processcommand.h:3: error: previous declaration of 'getinput' was here processcommand.c: In function 'getinput': processcommand.c:8: warning: return makes integer from pointer without a cast processcommand.c: At top level: processcommand.c:12: error: conflicting types for 'printoutput' processcommand.h:4: error: previous declaration of 'printoutput' was here </code></pre> <p>My code files are: <strong>main.c</strong></p> <pre><code>#include "main.h" int main() { float version = 0.2; printf("Qwesomeness Command Interprepter version %f by Zeb McCorkle starting...\n", version); printf("%s", getcommand()); } </code></pre> <p><strong>main.h</strong></p> <pre><code>#include "includes.h" int main(); </code></pre> <p><strong>includes.h</strong></p> <pre><code>#include &lt;stdio.h&gt; #include &lt;string.h&gt; </code></pre> <p><strong>processcommand.c</strong></p> <pre><code>#include "processcommand.h" getinput() { char *output; printf(" "); scanf("%s", output); return output; } printoutput(char *input) { printf("%s", input); return 0; } getcommand() { printoutput("Command:"); return getinput(); } </code></pre> <p><strong>processcommand.h</strong></p> <pre><code>#include "includes.h" char *getinput(); unsigned char printoutput(char *input); char *getcommand(); </code></pre> <p>I believe that those are all of my source files. I compiled with</p> <pre><code>gcc main.c processcommand.c </code></pre> <p>Thank you for reading this.</p>
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    1. USMike D
    1. USZeb McCorkle
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      1. POCompilation error involving functions being declared twice and the types being different
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    1. COYour function declaration does not match your function definition.
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      1. POCompilation error involving functions being declared twice and the types being different
      1. USOliver Charlesworth
    2. COare you sure this is really all your code? The error in processcommand.h is of the kind that "shouldn't happen". There's nothing in the code you posted that could cause that. What is line 5 of processcommand.h ?
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      1. POCompilation error involving functions being declared twice and the types being different
      1. USMedinoc
    3. CO@mypal125: Why did you omit return types and parameter lists in your function definitions? Note, BTW, that parameter-less functions in C are declared with `(void)` parameters, not as simple `()`.
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