A `freestanding` environment is one in which the standard library may not exist, and program startup may not necessarily be at &quot;main&quot;. The option `-ffreestanding` directs the compiler to *not* assume that standard functions have their usual definition.

By default, GCC will act as the compiler for a hosted implementation, defining `__STDC_HOSTED__` as 1 and presuming that when the names of ISO C functions are used, they have the semantics defined in the standard. To make it act as a conforming freestanding implementation for a freestanding environment, use the option `-ffreestanding`. It will then define `__STDC_HOSTED__` to 0, and not make assumptions about the meanings of function names from the standard library.

For more Info, [This](https://gcc.gnu.org/onlinedocs/gcc/Standards.html) link may help.

I&#39;m curious when these two functions will return different values. Also if  you could clarify the difference between a path/directory/file that would be appreciated.

Difference between os.path.exists and os.path.isfile?

I want to have a Button that defines no `CornerRadius` and two others that do, how can I achieve this?

    &lt;Style TargetType=&quot;Button&quot; x:Key=&quot;TabButton&quot;&gt;
        &lt;Setter Property=&quot;Background&quot; Value=&quot;White&quot; /&gt;
        &lt;Setter Property=&quot;TextBlock.TextAlignment&quot; Value=&quot;Center&quot; /&gt;
        &lt;Setter Property=&quot;Template&quot;&gt;
            &lt;Setter.Value&gt;
                &lt;ControlTemplate TargetType=&quot;Button&quot;&gt;
                    &lt;Border CornerRadius=&quot;0&quot; Background=&quot;White&quot; BorderBrush=&quot;#ccc&quot; BorderThickness=&quot;0,1,1,0&quot; &gt;
                        &lt;ContentPresenter x:Name=&quot;contentPresenter&quot; ContentTemplate=&quot;{TemplateBinding ContentTemplate}&quot; Content=&quot;{TemplateBinding Content}&quot; HorizontalAlignment=&quot;{TemplateBinding HorizontalContentAlignment}&quot; Margin=&quot;{TemplateBinding Padding}&quot; VerticalAlignment=&quot;{TemplateBinding VerticalContentAlignment}&quot;/&gt;
                    &lt;/Border&gt;
                &lt;/ControlTemplate&gt;
            &lt;/Setter.Value&gt;
        &lt;/Setter&gt;
    &lt;/Style&gt;

    &lt;Style TargetType=&quot;Button&quot; x:Key=&quot;TabButtonFirst&quot; BasedOn=&quot;{StaticResource TabButton}&quot;&gt;
        &lt;Setter Property=&quot;CornerRadius&quot; Value=&quot;3,0,0,0&quot; /&gt;
    &lt;/Style&gt;

    &lt;Style TargetType=&quot;Button&quot; x:Key=&quot;TabButtonLast&quot; BasedOn=&quot;{StaticResource TabButton}&quot;&gt;
        &lt;Setter Property=&quot;CornerRadius&quot; Value=&quot;0,0,0,3&quot; /&gt;
    &lt;/Style&gt;

Set CornerRadius on button template

What is `ffreestanding` in gcc ? What is it used for ? I came across the following :

    gcc -ffreestanding -m32 -c kernel.c -o kernel.o

and do not understand, what does it mean exactly.


What is -ffreestanding option in gcc?

What is <code>ffreestanding</code> in gcc ? What is it used for ? I came across the following :
<pre><code class="hljs language-r">gcc -ffreestanding -m32 -c kernel.c -o kernel.o
</code></pre>
and do not understand, what does it mean exactly.

As the title says, I have this code:
```c
    typedef struct Book{
        int id;
        char title[256];
        char summary[2048];
        int numberOfAuthors;
        struct Author *authors;
    };


    typedef struct Author{
        char firstName[56];
        char lastName[56];
    };


    typedef struct Books{
        struct Book *arr;
        int numberOfBooks;
    };
```


I get these errors from gcc :

    bookstore.c:8:2: error: unknown type name ‘Author’
    bookstore.c:9:1: warning: useless storage class specifier in empty declaration [enabled by default]
    bookstore.c:15:1: warning: useless storage class specifier in empty declaration [enabled by default]
    bookstore.c:21:2: error: unknown type name ‘Book’
    bookstore.c:23:1: warning: useless storage class specifier in empty declaration [enabled by default]



No warnings and no errors occur if I change the typedefs like this:

```c
    typedef struct{
        char firstName[56];
        char lastName[56];
    } Author;
```

Having searched through _[C Programming Language, 2nd Edition][1]_ and googled for a couple of hours, I can&#39;t figure out why the first implementation won&#39;t work.
    
[1]:http://www.amazon.com/C-Programming-Language-2nd-Edition/dp/0131103628

C : typedef struct name {...}; VS typedef struct{...} name;

I have seen in many posts that &quot;in most of the cases array names decay into pointers&quot;.&lt;br&gt;Can I know in what cases/expressions the array name doesn&#39;t decay into a pointer to its first elements?

Exceptions to array decaying into a pointer?

I defined a special file: `config.h`

My project also has files:

    t.c, t.h
    pp.c, pp.h
    b.c b.h
    l.cpp

and #includes:

**in t.c:**

	
        #include &quot;t.h&quot;
    	#include &quot;b.h&quot;
    	#include &quot;pp.h&quot;
        #include &quot;config.h&quot;
	
**in b.c:**	

        #include &quot;b.h&quot;
    	#include &quot;pp.h&quot;
	
**in pp.c:**

        #include &quot;pp.h&quot;
    	#include &quot;config.h&quot;
	
**in l.cpp:**

    	#include &quot;pp.h&quot;
    	#include &quot;t.h&quot;
    	#include &quot;config.h&quot;
	
there are no include directives in my `*.h` files, only in `*.c` files. I defined this in config.h:

    const char *names[i] =
            {
                &quot;brian&quot;, &quot;stefan&quot;, &quot;steve&quot;
            };
        
and need that array in l.cpp, t.c, pp.c but Im getting this error:

    pp.o:(.data+0x0): multiple definition of `names&#39;
    l.o:(.data+0x0): first defined here
    t.o:(.data+0x0): multiple definition of `names&#39;
    l.o:(.data+0x0): first defined here
    collect2: ld returned 1 exit status
    make: *** [link] Error 1

I have include guards in every `*.h` file I use in my project. Any help solving this?




Multiple definition of ... linker error

I am on CentOS 6.4 32 bit and am trying to cause a buffer overflow in a program. Within GDB it works. Here is the output:

    [root@localhost bufferoverflow]# gdb stack
    GNU gdb (GDB) Red Hat Enterprise Linux (7.2-60.el6_4.1)
    Copyright (C) 2010 Free Software Foundation, Inc.
    License GPLv3+: GNU GPL version 3 or later &lt;http://gnu.org/licenses/gpl.html&gt;
    This is free software: you are free to change and redistribute it.
    There is NO WARRANTY, to the extent permitted by law.  Type &quot;show copying&quot;
    and &quot;show warranty&quot; for details.
    This GDB was configured as &quot;i686-redhat-linux-gnu&quot;.
    For bug reporting instructions, please see:
    &lt;http://www.gnu.org/software/gdb/bugs/&gt;...
    Reading symbols from /root/bufferoverflow/stack...done.
    (gdb) r
    Starting program: /root/bufferoverflow/stack
    process 6003 is executing new program: /bin/bash
    Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.107.el6_4.2.i686
    sh-4.1#

However when I run the program stack just on its own it seg faults. Why might this be?

Buffer overflow works in gdb but not without it

I don&#39;t understand how BLAS, LAPACK and ATLAS are related and how I should use them together! I have been looking through all of their manuals and I have a general idea of BLAS and LAPACK and how to use them with the very few examples I find, but I can&#39;t find any actual examples using ATLAS to see how it is related with these two.

I am trying to do some low level work on matrixes and my primary language is C. First I wanted to use GSL, but it says that if you want the best performance you should use BLAS and ATLAS. Is there any good webpage giving some nice examples of how to use these (in C) all together? In other words I am looking for a tutorial on using these three (or any subset of them!). In short I am confused!

What is the relation between BLAS, LAPACK and ATLAS

I&#39;m trying to programmatically find the `#include` path on Linux, which as I understand it, in practice means finding what GCC considers it to be. (Is that quite true? How does Clang do it?)

According to http://gcc.gnu.org/onlinedocs/cpp/Search-Path.html some of the components involve the CPU architecture and the GCC version; the latter in particular seems tricky; I suppose it could be obtained by running `gcc --version` and parsing the output (or `gcc -v`), but this seems inelegant at best and fragile at worst. Doing it from within one&#39;s code assuming one&#39;s program is being compiled with GCC might be another option, but it would require depending on that assumption.

What&#39;s the recommended way to do it?

Finding out what the GCC include path is

I have the following simplified code:

    #include &lt;stdio.h&gt;
    int main () 
    {
    	printf(&quot;Hello &quot;);
    	goto Cleanup;
    Cleanup:
    	char *str = &quot;World\n&quot;;
    	printf(&quot;%s\n&quot;, str);
    }

I get an error because a new variable is declared after the label. If I put the content (mainly initialization) after the label in a {} block, compilation succeeds.

I think I understand the reason for the block in case of a switch, but why should it be applicable in case of a label ?

This error is from a gcc compiler




Why do I get &quot;a label can only be part of a statement and a declaration is not a statement&quot; if I have a variable that is initialized after a label?

Here is a piece of code in `/usr/src/linux-3.10.10-1-ARCH/include/linux/printk.h`:

    static inline int printk_get_level(const char *buffer)
    {
      if (buffer[0] == KERN_SOH_ASCII &amp;&amp; buffer[1]) {
        switch (buffer[1]) {
        case &#39;0&#39; ... &#39;7&#39;:
        case &#39;d&#39;:  /* KERN_DEFAULT */
          return buffer[1];
        }
      }
    }

Is it a kind of operator? Why does &quot;The C Programming Language&quot; not mention it?

What is &quot;...&quot; in switch-case in C code

Why does the **C** preprocessor in **GCC** interpret the word `linux` (small letters) as the constant `1`?

**test.c:**

    #include &lt;stdio.h&gt;
    int main(void)
    {       
        int linux = 5;
        return 0;
    }


Result of `$ gcc -E test.c` (stop after the preprocessing stage):

    ....
    int main(void)
    {
        int 1 = 5;
        return 0;
    }

Which of course yields an error.

(BTW: There is no `#define linux` in the `stdio.h` file.)


Why does the C preprocessor interpret the word &quot;linux&quot; as the constant &quot;1&quot;?

I&#39;m trying to compile this source code from the makefile in a VPS, but its not working. The VPS is a 64 Cent OS

Here&#39;s the full error

    # make
    gcc -c -O3 -w -DLINUX -I../SDK/amx/ ../SDK/amx/*.c
    g++ -c -O3 -w -DLINUX -I../SDK/amx/ ../SDK/*.cpp
    g++ -c -O3 -w -DLINUX -I../SDK/amx/ *.cpp
    g++ -O2 -fshort-wchar -shared -o &quot;TCP_V1.so&quot; *.o
    /usr/bin/ld: TCP-LINUX_V1.o: relocation R_X86_64_32 against `.rodata.str1.8&#39; can not be     used when making a shared object; recompile with -fPIC
    TCP-LINUX_V1.o: could not read symbols: Bad value
    collect2: ld returned 1 exit status
    make: *** [all] Error 1

Here&#39;s my makefile:

    GPP=g++
    GCC=gcc
    OUTFILE=&quot;TCP_V1.so&quot;

    COMPILE_FLAGS=-c -O3 -w -DLINUX -I../SDK/amx/

    all:
	    $(GCC) $(COMPILE_FLAGS) ../SDK/amx/*.c
	    $(GPP) $(COMPILE_FLAGS) ../SDK/*.cpp
	    $(GPP) $(COMPILE_FLAGS) *.cpp
	    $(GPP) -O2 -fshort-wchar -shared -o $(OUTFILE) *.o

Anyone know what&#39;s wrong?


Compilation fails with &quot;relocation R_X86_64_32 against `.rodata.str1.8&#39; can not be used when making a shared object&quot;

I am trying to compile software on Blue Gene Q using IBM XL compilers and I got this error message:

    &quot;iostreams/zlib.cpp&quot;, line 19.10: 1540-0836 (S) The #include file &quot;zlib.h&quot; is not found.
    make[3]: *** [zlib.o] Error 1

I have installed a new version of zlib and updated `LD_LIBRARY_PATH` with `$HOME/zlib/include`

Am I missing something?


Compilation error - missing zlib.h

## The Situation ##

Nested within our Angular app is a directive called Page, backed by a controller, which contains a div with an ng-bind-html-unsafe attribute. This is assigned to a $scope var called &#39;pageContent&#39;. This var gets assigned dynamically generated HTML from a database. When the user flips to the next page, a called to the DB is made, and the pageContent var is set to this new HTML, which gets rendered onscreen through ng-bind-html-unsafe. Here&#39;s the code:

**Page directive**

    angular.module(&#39;myApp.directives&#39;)
        .directive(&#39;myPage&#39;, function ($compile) {
    
            return {
                templateUrl: &#39;page.html&#39;,
                restrict: &#39;E&#39;,
                compile: function compile(element, attrs, transclude) {
                    // does nothing currently
                    return {
                        pre: function preLink(scope, element, attrs, controller) {
                            // does nothing currently
                        },
                        post: function postLink(scope, element, attrs, controller) {
                            // does nothing currently
                        }
                    }
                }
            };
        });

**Page directive&#39;s template** (&quot;page.html&quot; from the templateUrl property above)

    &lt;div ng-controller=&quot;PageCtrl&quot; &gt;
       ...
       &lt;!-- dynamic page content written into the div below --&gt;
       &lt;div ng-bind-html-unsafe=&quot;pageContent&quot; &gt;
       ...
    &lt;/div&gt;

**Page controller**

    angular.module(&#39;myApp&#39;)
      .controller(&#39;PageCtrl&#39;, function ($scope) {
    
            $scope.pageContent = &#39;&#39;;
    
            $scope.$on( &quot;receivedPageContent&quot;, function(event, args) {
                console.log( &#39;new page content received after DB call&#39; );
                $scope.pageContent = args.htmlStrFromDB;
            });

    });

That works. We see the page&#39;s HTML from the DB rendered nicely in the browser. When the user flips to the next page, we see the next page&#39;s content, and so on. So far so good.

## The Problem ##

The problem here is that we want to have interactive content inside of a page&#39;s content. For instance, the HTML may contain a thumbnail image where, when the user clicks on it, Angular should do something awesome, such as displaying a pop-up modal window. I&#39;ve placed Angular method calls (ng-click) in the HTML strings in our database, but of course Angular isn&#39;t going to recognize either method calls or directives unless it somehow parses the HTML string, recognizes them and compiles them.

**In our DB**

Content for Page 1:

    &lt;p&gt;Here&#39;s a cool pic of a lion. &lt;img src=&quot;lion.png&quot; ng-click=&quot;doSomethingAwesone(&#39;lion&#39;, &#39;showImage&#39;)&quot; &gt; Click on him to see a large image.&lt;/p&gt;

Content for Page 2:

    &lt;p&gt;Here&#39;s a snake. &lt;img src=&quot;snake.png&quot; ng-click=&quot;doSomethingAwesone(&#39;snake&#39;, &#39;playSound&#39;)&quot; &gt;Click to make him hiss.&lt;/p&gt;

Back in the Page controller, we then add the corresponding $scope function:

**Page controller**

    $scope.doSomethingAwesome = function( id, action ) {
        console.log( &quot;Going to do &quot; + action + &quot; with &quot;+ id );
    }

I can&#39;t figure out how to call that &#39;doSomethingAwesome&#39; method from within the HTML string from the DB. I realize Angular has to parse the HTML string somehow, but how? I&#39;ve read vague mumblings about the $compile service, and copied and pasted some examples, but nothing works. Also, most examples show dynamic content only getting set during the linking phase of the directive. We would want Page to stay alive throughout the life of the app. It constantly receives, compiles and displays new content as the user flips through pages. 

In an abstract sense, I guess you could say we are trying to dynamically nest chunks of Angular within an Angular app, and need to be able to swap them in and out.

I&#39;ve read various bits of Angular documentation multiple times, as well as all sorts of blog posts, and JS Fiddled with people&#39;s code. I don&#39;t know whether I&#39;m completely misunderstanding Angular, or just missing something simple, or maybe I&#39;m slow. In any case, I could use some advice.

Compiling dynamic HTML strings from database

I am very new to C#. I have just run C# &#39;Hello World&#39; program using Visual Studio.

Can I run or compile a C# program without using Visual Studio?

If it is possible, then which compiler should I use?

Thanks

How can I compile and run c# program without using visual studio?

# Background

Trying to add a Java library to the local Maven repository using a clean install of Apache Maven 3.1.0, with Java 1.7. Here is how the Java archive file was added:

    mvn install:install-file \
      -DgroupId=net.sourceforge.ant4x \
      -DartifactId=ant4x \
      -Dversion=0.3.0 \
      -Dfile=ant4x-0.3.0.jar \
      -Dpackaging=jar

This created the following directory structure:

    $HOME/.m2/repository/net/sourceforge/ant4x/
    ├── 0.3.0
    │   ├── ant4x-0.3.0.jar.lastUpdated
    │   └── ant4x-0.3.0.pom.lastUpdated
    └── ant4x
        ├── 0.3.0
        │   ├── ant4x-0.3.0.jar
        │   ├── ant4x-0.3.0.pom
        │   └── _remote.repositories
        └── maven-metadata-local.xml

The project&#39;s `pom.xml` file references the dependent project (the tree above) as follows:

    &lt;properties&gt;
      &lt;java-version&gt;1.5&lt;/java-version&gt;
      &lt;net.sourceforge.ant4x-version&gt;0.3.0&lt;/net.sourceforge.ant4x-version&gt;
      &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt;
    &lt;/properties&gt;
    ...
    &lt;dependency&gt;
      &lt;groupId&gt;net.sourceforge&lt;/groupId&gt;
      &lt;artifactId&gt;ant4x&lt;/artifactId&gt;
      &lt;version&gt;${net.sourceforge.ant4x-version}&lt;/version&gt;
      &lt;scope&gt;provided&lt;/scope&gt;
    &lt;/dependency&gt;

# Problem

After running `mvn compile`, the following error was returned ([full log on Pastebin][1]):

    [ERROR] Failed to execute goal on project ant4docbook: Could not resolve dependencies for project net.sourceforge:ant4docbook:jar:0.6-SNAPSHOT: Failure to find net.sourceforge:ant4x:jar:0.3.0 in http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced -&gt; [Help 1]

The [documentation][2] notes a number of issues that could be present, however none of these appear to apply.

# Ideas

I tried the following, as per the documentation:

1. Copy default settings to user&#39;s home directory for Maven:&lt;pre&gt;
   cp /opt/apache-maven-3.1.0/conf/settings.xml $HOME/.m2/.&lt;/pre&gt;
1. Edit the user&#39;s settings.xml file.
1. Update the value for the local repository:&lt;pre&gt;
   &lt;localRepository&gt;${user.home}/.m2/repository&lt;/localRepository&gt;&lt;/pre&gt;
1. Save the file.

I also tried the following commands:

    mvn -U
    mvn clear -U

I tried using Maven 3.0.5, but that failed, too.

# Question

How do you force Maven to use the local version of the library, rather than trying to seek out a library that is not yet available to download?

# Related

Related questions and information that did not resolve the issue:

- https://stackoverflow.com/questions/5684933/the-pom-for-org-springframework-securityorg-springframework-security-webjar3
- https://stackoverflow.com/questions/5805962/how-can-i-locate-the-pom-which-requests-a-missing-pom
- https://stackoverflow.com/questions/1355548/maven-including-jar-not-found-in-public-repository
- http://maven.apache.org/guides/mini/guide-3rd-party-jars-local.html
- http://giallone.blogspot.ca/2012/12/maven-install-missing-offline.html

  [1]: http://pastebin.com/raw.php?i=hQXa8WV9
  [2]: https://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException

The POM for project is missing, no dependency information available

So I am trying to start an assignment, my professor gives us a Main.cpp, Main.h, Scanner.cpp, Scanner.h, and some other utilities.

My job is to create a Similarity class to compare documents using the cosine and Jaccard coefficients. However, I can not seem to get the project linked correctly, therefore I am unable to start on the actual code.

After trying for several hours to see what I am doing wrong, I need fresh eyes to see what I am doing wrong, I suspect it is obvious.

Here is the Main.cpp

    #include &quot;Main.h&quot;
    
    using namespace std;
    
    static const string TAG = &quot;Main: &quot;;
    
    int main(int argc, char *argv[])
    {
      string inStreamName;
      string logStreamName;
      string outStreamName;
    
      ofstream outStream;
      string timeCallOutput;
      Scanner inStream;
    
      Similarity similarity;
    
      ///////////////////////////////////////////////////////////////
      // Boilerplate for naming files and opening files
      Utils::CheckArgs(3, argc, argv, &quot;infilename outfilename logfilename&quot;);
      outStreamName = static_cast&lt;string&gt;(argv[2]);
      logStreamName = static_cast&lt;string&gt;(argv[3]);
    
      Utils::FileOpen(outStream, outStreamName);
      Utils::LogFileOpen(logStreamName);
    
      timeCallOutput = Utils::timecall(&quot;beginning&quot;);
      Utils::logStream &lt;&lt; timeCallOutput &lt;&lt; endl;
      Utils::logStream &lt;&lt; TAG &lt;&lt; &quot;Beginning execution&quot; &lt;&lt; endl;
    
      Utils::logStream &lt;&lt; TAG &lt;&lt; &quot;outfile &#39;&quot; &lt;&lt; outStreamName &lt;&lt; &quot;&#39;&quot; &lt;&lt; endl;
      Utils::logStream &lt;&lt; TAG &lt;&lt; &quot;logfile &#39;&quot; &lt;&lt; logStreamName &lt;&lt; &quot;&#39;&quot; &lt;&lt; endl;
      Utils::logStream.flush();
    
      ///////////////////////////////////////////////////////////////
      // What follows here is the real work of this code.
      //   read the entire input file and echo it back
      //   compute the two similarity coefficients
    
      inStreamName = static_cast&lt;string&gt;(argv[1]);
      inStream.openFile(inStreamName);
      Utils::logStream &lt;&lt; TAG &lt;&lt; &quot;infile &#39;&quot; &lt;&lt; inStreamName &lt;&lt; &quot;&#39;&quot; &lt;&lt; endl;
      Utils::logStream.flush();
    
      similarity.readData(inStream);
    
      outStream &lt;&lt; TAG &lt;&lt; &quot;Data Begin\n&quot; &lt;&lt; similarity.toString() &lt;&lt; endl;
      outStream &lt;&lt; TAG &lt;&lt; &quot;Data End\n&quot; &lt;&lt; endl;
      outStream.flush();
      inStream.close();
    
      outStream &lt;&lt; TAG &lt;&lt; &quot;Begin similarity computation&quot; &lt;&lt; endl;
      outStream &lt;&lt; TAG &lt;&lt; &quot;Maximum Jaccard similarity:\n&quot; &lt;&lt;
                           similarity.maxJaccard() &lt;&lt; endl;
      outStream &lt;&lt; TAG &lt;&lt; &quot;Maximum cosine similarity:\n&quot; &lt;&lt;
                           similarity.maxCosine() &lt;&lt; endl;
      outStream &lt;&lt; TAG &lt;&lt; &quot;End similarity computation&quot; &lt;&lt; endl;
      outStream.flush();
    
      ///////////////////////////////////////////////////////////////
      // Boilerplate for terminating gracefully
      Utils::logStream &lt;&lt; TAG &lt;&lt; &quot;Ending execution&quot; &lt;&lt; endl;
      timeCallOutput = Utils::timecall(&quot;ending&quot;);
      Utils::logStream &lt;&lt; timeCallOutput &lt;&lt; endl;
      Utils::logStream.flush();
    
      outStream.flush();
      Utils::FileClose(outStream);
    
      Utils::FileClose(Utils::logStream);
    
      return 0;
    }
And the Main.h

    #ifndef MAIN_H
    #define MAIN_H
    
    #include &quot;../../Utilities/Utils.h&quot;
    #include &quot;../../Utilities/Scanner.h&quot;
    
    #include &quot;Similarity.h&quot;
    
    class Main
    {
    public:
      int main();
      virtual ~Main();
    
    private:
    
    };
    
    #endif // MAIN_H

My Similarity.cpp

    #include &quot;Similarity.h&quot;
    
    using namespace std;
    
    void readData(Scanner&amp; inStream){
    }
    
    string maxCosine(){
    	return &quot;cosine&quot;;
    }
    
    string maxJaccard(){
    	return &quot;jaccard&quot;;
    }
    
    string toString(){
    	return &quot;toString&quot;;
    }

And finally my Similarity.h:

    #ifndef SIMILARITY_H
    #define SIMILARITY_H
    
    #include &quot;../../Utilities/Scanner.h&quot;
    
    class Similarity
    {
    public:
    	Similarity();
    	virtual ~Similarity();
    
    	void readData(Scanner&amp; inStream);
    	string maxCosine();
    	string maxJaccard();
    	string toString();
    private:
    
    };
    
    #endif

When I use the makefile he provided, and the one I have to use in order for his script to work to grade it I get this error:

    g++ -O3 -Wall -o Similarity.o -c Similarity.cpp
    g++ -O3 -Wall -o Aprog Main.o Similarity.o Scanner.o ScanLine.o Utils.o 
    Undefined symbols for architecture x86_64:
      &quot;Similarity::maxJaccard()&quot;, referenced from:
          _main in Main.o
      &quot;Similarity::readData(Scanner&amp;)&quot;, referenced from:
          _main in Main.o
      &quot;Similarity::toString()&quot;, referenced from:
          _main in Main.o
      &quot;Similarity::maxCosine()&quot;, referenced from:
          _main in Main.o
      &quot;Similarity::Similarity()&quot;, referenced from:
          _main in Main.o
      &quot;Similarity::~Similarity()&quot;, referenced from:
          _main in Main.o
    ld: symbol(s) not found for architecture x86_64
    collect2: ld returned 1 exit status
    make: *** [Aprog] Error 1

Thank you for reading through all that, any suggestions or solutions would be greatly appreciated.


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Solution 1 - C	Dayal rai	View Answer on Stackoverflow

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