[Help] cos() function with Classes

Discussion in 'C++' started by Max_Payne_007, Dec 7, 2007.

  1. Max_Payne_007

    Max_Payne_007 New Member

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    Code:


    NumeroReal.h

    Code:
    
    
    #pragma once
    
    #include <iostream>
    #include <cmath>
    #include <cstdlib>
    
    using namespace std;
    
    class NumeroReal
    {
    private:
    	double n;
    
    public:
    	NumeroReal();													  // default constructor
    	NumeroReal( double n );									   // parameter constructor
    	NumeroReal( const NumeroReal &unNumeroReal ); // copy constructor
    	~NumeroReal();												   // destructor
     
    	void setNumeroReal( double n );
    	double getNumeroReal() const;
    
    	friend ostream &operator << ( ostream &output, const NumeroReal &unNumeroReal );
    	friend istream &operator >> ( istream &input, NumeroReal &unNumeroReal );
    
    	NumeroReal cos() const;
    
    };
    



    NumeroReal.cpp

    Code:
    
    
    #include "NumeroReal.h"
    
    NumeroReal::NumeroReal(void)
    {
    	this->n = 1.0;
    }
    
    NumeroReal::NumeroReal( double n ) 
    {
    	this->n = n;
    }
    
    NumeroReal::NumeroReal( const NumeroReal &unNumeroReal )
    {
    	this->n = unNumeroReal.n;
    }
    
    NumeroReal::~NumeroReal(void)
    {
    }
    
    //xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    
    
    void NumeroReal::setNumeroReal( double n )
    {
    	this->n = n;
    }
    
    double NumeroReal::getNumeroReal() const
    {
    	return ( this->n );
    }
    
    //xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    
    ostream &operator << ( ostream &output, const NumeroReal &unNumeroReal )
    {
    	output << unNumeroReal.n;
    	
    	return ( output );
    }
    
    istream &operator >> ( istream &input, NumeroReal &unNumeroReal )
    {
    	cout << "Entre un numero real: ";
    	cin >> unNumeroReal.n;
    
    	return ( input );
    }
    
    
    NumeroReal NumeroReal::cos() const
    {
    	return ( this->cos() );
    }
    
    
    

    Main.cpp


    Code:
    
    #include "NumeroReal.h"
    
    #include <iostream>
    #include <cmath>
    #include <conio.h>
    #include <cstdlib>
    
    using namespace std;
    
    int main ()
    {
    
    	NumeroReal n1, n2( 4.0 );
    
    	cout << "Numero Real # 1" << endl;
    	cin >> n1;
    
    	cout << "\nNumero Real # 2" << endl;
    	cin >> n2;
    
    
    	cout << cos( n1 ) << "\n\n";
    
    	system("PAUSE");
    		return 0;
    }
    
    

    I want to find the cos( n1 ) but when i try to print it it gives me this error:

    ------ Build started: Project: CalculosNumeros, Configuration: Debug Win32 ------
    Compiling...
    Main.cpp
    c:\documents and settings\mpayne007\my documents\visual studio 2005\projects\calculosnumeros\calculosnumeros\main.cpp(78) : error C2665: 'cos' : none of the 3 overloads could convert all the argument types
    c:\program files\microsoft visual studio 8\vc\include\math.h(116): could be 'double cos(double)'
    c:\program files\microsoft visual studio 8\vc\include\math.h(503): or 'float cos(float)'
    c:\program files\microsoft visual studio 8\vc\include\math.h(551): or 'long double cos(long double)'
    while trying to match the argument list '(NumeroReal)'
    Build log was saved at "file://c:\Documents and Settings\MPayne007\My Documents\Visual Studio 2005\Projects\CalculosNumeros\CalculosNumeros\Debug\BuildLog.htm"
    CalculosNumeros - 1 error(s), 0 warning(s)
    ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
     
  2. Max_Payne_007

    Max_Payne_007 New Member

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    ahhh. I totally forgot this forum.. I have just remembered the crazy old guy and the mad Admin who wouldn't admit editing.

    Just delete my thread...
     
  3. shabbir

    shabbir Administrator Staff Member

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    Can you please take time to explain what I have not admitted. Do you mean to say the post edited by reason.
     

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