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function takes 0 arguments error - probably a dumb question

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function takes 0 arguments error - probably a dumb question

 
0
  #1
Sep 29th, 2006
This is a simple Rectangle calculator that uses classes.
Ok, so I keep getting errors like.
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Error 1 error C2660: 'rectangle::getLength' : function does not take 0 arguments
Error 2 error C2660: 'rectangle::getWidth' : function does not take 0 arguments
Error 3 error C2660: 'rectangle::getLength' : function does not take 0 arguments
Error 4 error C2660: 'rectangle::getWidth' : function does not take 0 arguments
Error 5 error C2660: 'rectangle::getLength' : function does not take 0 arguments
Error 6 error C2660: 'rectangle::setLength' : function does not take 0 arguments
Error 7 error C2660: 'rectangle::getWidth' : function does not take 0 arguments
Error 8 error C2660: 'rectangle::setWidth' : function does not take 0 arguments
Error 9 error C2660: 'rectangle::calcPerimeter' : function does not take 0 arguments
Error 10 error C2660: 'rectangle::calcArea' : function does not take 0 arguments
What am I not doing?

class.cpp

C++ Syntax (Toggle Plain Text) 
  1. #include <iostream>
  2. #include "class.h"
  3.  
  4. using namespace std;
  5.  
  6. int main()
  7. {
  8.  
  9. cout << "Welcome to the Rectangle Calculator" << endl;
  10. cout << "You can calculate the Perimeter and Area" << endl;
  11.  
  12. rectangle Rectangle;        //instantiate the Rectangle
  13.  
  14. Rectangle.getLength();
  15. Rectangle.setLength();
  16. Rectangle.getWidth();
  17. Rectangle.setWidth();
  18.  
  19. Rectangle.calcPerimeter();
  20. Rectangle.calcArea();
  21.  
  22.  
  23. return 0;
  24. }
class.h

C++ Syntax (Toggle Plain Text) 
  1. #ifndef CLASS_H
  2. #define CLASS_H
  3.  
  4. using namespace std;
  5.  
  6. class rectangle
  7. {
  8. private:
  9.     float length;                            //attributes of length and width
  10.     float width;
  11. public:
  12.     rectangle(float=1.0, float=1.0);            //constructor sets length and width defaults to 1
  13.  
  14.     float calcPerimeter(float, float)
  15.     {
  16.         float Peri;
  17.         Peri = getLength() *2 + getWidth() * 2;
  18.         return Peri;
  19.     }
  20.     float calcArea(float, float)
  21.     {
  22.         float Area;
  23.         Area = getLength() * getWidth();
  24.         return Area;
  25.     }
  26.     void setLength(float)
  27.     {
  28.         if (length < 0.0 && length <= 20.0)
  29.             cout << "The measure of length falls between the correct range" << endl;
  30.         else
  31.             cout << "The length does not fall between the correct range (0.0 and 20.0)";
  32.     }
  33.     void setWidth(float)
  34.     {
  35.         if (width < 0.0 && width <= 20.0)
  36.             cout << "The width falls between the correct range (0.0 and 20.0)" << endl;
  37.         else
  38.             cout << "The width does not fall between the correct range (0.0 and 20.0)" << endl;
  39.     }
  40.     float getLength(float)
  41.     {
  42.         float Len;
  43.         cout << "Enter the length: ";
  44.         cin >> Len;
  45.         cout << endl;
  46.         return Len;
  47.     }
  48.     float getWidth(float)
  49.     {
  50.         float Wid;
  51.         cout << "Enter the width: ";
  52.         cin >> Wid;
  53.         cout << endl;
  54.         return Wid;
  55.     }
  56. };
  57. #endif
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Re: function takes 0 arguments error - probably a dumb question

 
0
  #2
Sep 29th, 2006
Yuo should run throught tutorial. You should know the diffrence from set and get. For example
C++ Syntax (Toggle Plain Text) 
  1. float getLength(float)
  2.     {
  3.         float Len;
  4.         cout << "Enter the length: ";
  5.         cin >> Len;
  6.         cout << endl;
  7.         return Len;
  8.     }
you need
C++ Syntax (Toggle Plain Text) 
  1. float getLength(void)
  2.     {
  3.  
  4.         return length;
  5.     }
For set func
C++ Syntax (Toggle Plain Text) 
  1. void setLength(float someLen)
  2. {
  3.    length = someLen;
  4. }
The constructor is wrong also you cant assign values to types.
C++ Syntax (Toggle Plain Text) 
  1. rectangle(float=1.0, float=1.0);
instead
C++ Syntax (Toggle Plain Text) 
  1. rectangle(float Len, float Width)
  2. {
  3.    length = Len;
  4.    width = Width;
  5. }
Last edited by andor; Sep 29th, 2006 at 11:13 am.
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Re: function takes 0 arguments error - probably a dumb question

 
0
  #3
Sep 29th, 2006
i believe you can set the data type to zero in this instance, unless my book is wrong...

they have..


class Time {
public:
Time(int = 0, int = 0, int = 0); //default constructor
private:
int hour;
int minute;
int second;
};


//i am also not using a get or set function from a library... this is just my variable name
Last edited by hoosier23; Sep 29th, 2006 at 11:34 am.
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Re: function takes 0 arguments error - probably a dumb question

 
1
  #4
Sep 29th, 2006
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Originally Posted by hoosier23 View Post
i believe you can set the data type to zero in this instance, unless my book is wrong...

they have..


class Time {
public:
Time(int = 0, int = 0, int = 0); //default constructor
private:
int hour;
int minute;
int second;
};


//i am also not using a get or set function from a library... this is just my variable name
Hm never seen that (probably becouse I'm not c++ programmer). But the book never lies. Make a test just leave the construtor and what will the copiler tell U
Last edited by andor; Sep 29th, 2006 at 11:48 am.
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Re: function takes 0 arguments error - probably a dumb question

 
1
  #5
Sep 29th, 2006
also.. i have changed the class.h and now receive only 2 errors

does anyone have any suggestions?

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Error 1 error LNK2019: unresolved external symbol "public: __thiscall rectangle::rectangle(float,float)" (??0rectangle@@QAE@MM@Z) referenced in function _main class.obj
Error 2 fatal error LNK1120: 1 unresolved externals
C++ Syntax (Toggle Plain Text) 
  1. #ifndef CLASS_H
  2. #define CLASS_H
  3.  
  4. using namespace std;
  5.  
  6. class rectangle
  7. {
  8. private:
  9.     float length;                            //attributes of length and width
  10.     float width;
  11. public:
  12.     rectangle(float length=1.0, float width=1.0);            //constructor sets length and width defaults to 1
  13.  
  14.     float calcPerimeter()
  15.     {
  16.         float Peri;
  17.         Peri = getLength() * 2 + getWidth() * 2;
  18.         return Peri;
  19.     }
  20.     float calcArea()
  21.     {
  22.         float Area;
  23.         Area = getLength() * getWidth();
  24.         return Area;
  25.     }
  26.     void setLength()
  27.     {
  28.         if (length >= 0.0 && length <= 20.0)
  29.             cout << "The measure of length falls between the correct range" << endl;
  30.         else
  31.             cout << "The length does not fall between the correct range (0.0 and 20.0)";
  32.     }
  33.     void setWidth()
  34.     {
  35.         if (width >= 0.0 && width <= 20.0)
  36.             cout << "The width falls between the correct range (0.0 and 20.0)" << endl;
  37.         else
  38.             cout << "The width does not fall between the correct range (0.0 and 20.0)" << endl;
  39.     }
  40.     float getLength()
  41.     {
  42.         cout << "Enter the length: ";
  43.         cin >> length;
  44.         cout << endl;
  45.         return length;
  46.     }
  47.     float getWidth()
  48.     {
  49.         cout << "Enter the width: ";
  50.         cin >> width;
  51.         cout << endl;
  52.         return width;
  53.     }
  54. };
  55. #endif
Last edited by hoosier23; Sep 29th, 2006 at 12:05 pm.
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Re: function takes 0 arguments error - probably a dumb question

 
2
  #6
Sep 29th, 2006
Change the constructor to
C++ Syntax (Toggle Plain Text) 
  1. rectangle()
  2.     {
  3.       length = 1;
  4.       width = 1;
  5.     }            //constructor sets length and width defaults to 1
or
C++ Syntax (Toggle Plain Text) 
  1. rectangle():length(1), width(1) {}
Compile and run
Last edited by andor; Sep 29th, 2006 at 12:05 pm.
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Re: function takes 0 arguments error - probably a dumb question

 
0
  #7
Sep 29th, 2006
Excellent work. Praise be to andor.

Thanks buddy. Viehlen Danke!
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