[OT] C++ Book Question (Was: Re: How to improve my question in stackoverflow?)

[Linux-Fan <Ma_Sys.ma@web.de>]

William Torrez Corea writes:

> Book.cpp:1:10: fatal error: Set: No existe el fichero o el directorio  
> [closed]
>
> I trying compile an example of a book.
>
> The program use three classes: Book, Customer and Library.

The question is offtopic for debian-user, how did it get here?
Also, how are subject and content related?

When giving the source code, give it in entirety, i.e. including the missing  
"customer.h", "library.h" and others. Also, for such long source codes,  
it seems preferrable to provide them as an attachment rather than inline.

> Book.cpp
> #include <set>

[...]

> When i compile the example with the following command:
> g++ -g -Wall  Book.cpp book.h -o book
>
>
> The result expected is bad.
> Book.cpp:1:10: fatal error: Set: No existe el fichero o el directorio
>  #include <Set>
>           ^~~~~
> compilation terminated.

[...]

> The book is C++17 By Example, published by Packt.

[...]

The immediate problem is with the case "Set" vs. "set". In your source code  
above you correctly have `#include <set>`, but the error message suggests  
that the `Book.cpp` you are trying to compile still has `#include <Set>` as  
displayed by the compiler.

In fact, this seems to be a known erratum for the book sample codes:
https://github.com/PacktPublishing/CPP17-By-Example/issues/1

Clone the repository to get the entire sample source code. I could get to  
compile the `Chapter04` example by making changes as attached in  
`patchbook.patch`. Apply it with

	patch --strip 1 < patchbook.patch

from inside the repository.

HTH
Linux-Fan

öö

diff --git a/Chapter04/LibraryPointer/Book.cpp b/Chapter04/LibraryPointer/Book.cpp
index ae86fd2..62f60f5 100644
--- a/Chapter04/LibraryPointer/Book.cpp
+++ b/Chapter04/LibraryPointer/Book.cpp
@@ -1,9 +1,9 @@
-#include <Set>
-#include <Map>
-#include <List>
-#include <String>
-#include <FStream>
-#include <Algorithm>
+#include <set>
+#include <map>
+#include <list>
+#include <string>
+#include <fstream>
+#include <algorithm>
 using namespace std;

 #include "Book.h"
@@ -84,4 +84,4 @@ ostream& operator<<(ostream& outStream, const Book& book) {
   }

   return outStream;
-}
\ No newline at end of file
+}
diff --git a/Chapter04/LibraryPointer/Customer.cpp b/Chapter04/LibraryPointer/Customer.cpp
index ac17964..31ffe1d 100644
--- a/Chapter04/LibraryPointer/Customer.cpp
+++ b/Chapter04/LibraryPointer/Customer.cpp
@@ -1,8 +1,8 @@
-#include <Set>
-#include <Map>
-#include <List>
-#include <String>
-#include <FStream>
+#include <set>
+#include <map>
+#include <list>
+#include <string>
+#include <fstream>
 using namespace std;

 #include "Book.h"
@@ -87,4 +87,4 @@ ostream& operator<<(ostream& outStream, const Customer& customer){
   }

   return outStream;
-}
\ No newline at end of file
+}
diff --git a/Chapter04/LibraryPointer/Library.cpp b/Chapter04/LibraryPointer/Library.cpp
index 10b4ac4..2c6f1a7 100644
--- a/Chapter04/LibraryPointer/Library.cpp
+++ b/Chapter04/LibraryPointer/Library.cpp
@@ -1,10 +1,10 @@
-#include <Set>
-#include <Map>
-#include <List>
-#include <String>
-#include <FStream>
-#include <IOStream>
-#include <CAssert>
+#include <set>
+#include <map>
+#include <list>
+#include <string>
+#include <fstream>
+#include <iostream>
+#include <cassert>
 using namespace std;

 #include "Book.h"
@@ -611,4 +611,4 @@ Library::~Library() {
   for (const Customer* customerPtr : m_customerPtrList) {
     delete customerPtr;
   }
-}
\ No newline at end of file
+}
diff --git a/Chapter04/LibraryPointer/Main.cpp b/Chapter04/LibraryPointer/Main.cpp
index 18d1637..586b47e 100644
--- a/Chapter04/LibraryPointer/Main.cpp
+++ b/Chapter04/LibraryPointer/Main.cpp
@@ -1,15 +1,16 @@
-#include <Set>
-#include <Map>
-#include <List>
-#include <String>
-#include <FStream>
-#include <IOStream>
+#include <set>
+#include <map>
+#include <list>
+#include <string>
+#include <fstream>
+#include <iostream>
 using namespace std;

 #include "Book.h"
 #include "Customer.h"
 #include "Library.h"

-void main() {
+int main() {
   Library();
-}
\ No newline at end of file
+  return 0;
+}

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