Thread: the "this" pointer

Hi,

Could someone take a look at this code (taken from Sam's Teach Yourself C++ in 24 hrs, 2nd ed.) and take a guess at why Dev-Cpp wouldn't compile it? Thanks.

Code:

// Listing 10.4
// Using the this pointer

#include <iostream>
#include <cstdlib>

using namespace std;

class Rectangle
{
public:
     Rectangle();
      ~Rectangle();
      void SetLength(int length) { this->itsLength = length; }
      int GetLength() const { return this->itsLength; }

      void SetWidth(int width) { itsWidth = width; }
      int GetWidth() const { return itsWidth; }

 private:
      int itsLength;
      int itsWidth;
 };

 Rectangle::Rectangle()
 {
     itsWidth = 5;
     itsLength = 10;
 }
 Rectangle::~Rectangle()
 {}

 int main()
 {
      Rectangle theRect;
      cout << "theRect is " << theRect.GetLength() << " feet long.\n";
      cout << "theRect is " << theRect.GetWidth() << " feet wide.\n";
      theRect.SetLength(20);
      theRect.SetWidth(10);
      cout << "theRect is " << theRect.GetLength()<< " feet long.\n";
      cout << "theRect is " << theRect.GetWidth()<< " feet wide.\n";
      system("pause");
      return 0;
 }

Here are the error msgs:


Compiler: Default compiler
Executing g++.exe...
g++.exe "C:\C\STYCPP24\SOURCE\Chapt10\List1004.cpp" -o "C:\C\STYCPP24\SOURCE\Chapt10\List1004.exe" -g3 -I"C:\DEVCPP\include\c++" -I"C:\DEVCPP\include\c++\mingw32" -I"C:\DEVCPP\include\c++\backward" -I"C:\DEVCPP\include" -L"C:\DEVCPP\lib"
C:/C/STYCPP24/SOURCE/Chapt10/List1004.cpp: In function `int main()':

C:/C/STYCPP24/SOURCE/Chapt10/List1004.cpp:35: `Rectangle' undeclared (first use
this function)

C:/C/STYCPP24/SOURCE/Chapt10/List1004.cpp:35: (Each undeclared identifier is
reported only once for each function it appears in.)
C:/C/STYCPP24/SOURCE/Chapt10/List1004.cpp:35: parse error before `;' token
C:/C/STYCPP24/SOURCE/Chapt10/List1004.cpp:36: `theRect' undeclared (first use
this function) Execution terminated

C:/C/STYCPP24/SOURCE/Chapt10/List1004.cpp:35: `Rectangle' undeclared (first use

I guess this is the offending line: Rectangle theRect;

...but it looks fine to a rookie like yours truly. Any ideas? Snide remarks?

Swaine777

I would suggest that Jesse Liberty's books are so bad, they have somehow corrupted the compiler. Did you leave your book on top of your computer?