Newbie help please

This is a discussion on Newbie help please within the C++ Programming forums, part of the General Programming Boards category; Hello everyone, I am new here and I was wondering if anyone could please give me some help!...I have a ...

  1. #1
    Registered User
    Join Date
    Dec 2006
    Posts
    7

    Newbie help please

    Hello everyone, I am new here and I was wondering if anyone could please give me some help!...I have a program that is just driving me nuts and I was wondering if anyone could help me out?...here is the header....now when I run this program I get 52 errors but I just want to start with the first one and then work on it and see if I can contiune!...the first error is that it says: error C2804: binary 'operator <' has too many parameters
    error C2333: 'CNum:perator`<'' : error in function declaration; skipping function...can anyone please explain to me why?...Thank you very much in advance and sorry to trouble you all if this is really simple:

    Code:
    #ifndef __CNUM_H__
    #define __CNUM_H__
    
    #include <iostream>
    
    class CNum
    {
    	private:
    		float R;
    		float I;
    
    	public:
    
      		
      		friend std::ostream& operator <(std::ostream & out, CNum& X);
       		friend std::istream& operator >(std::istream & in, CNum& X);
    		
    		
    		
    		
    
    		CNum operator+(const CNum& B) const; 
    
    		
    		CNum& operator++();    			
    
    
    std::ostream& operator <(std::ostream & out, CNum& X)
    {
    	std::out<< "("<< X.R <<"," << X.I<<")"<<"\n";
     	return out;
    }
    		  			
    std::istream& operator >(std::istream & in, CNum& X)
    {
    	std::in >> X.R >> X.I;
          return in;
    }	
    };
    
    #endif

  2. #2
    Registered User
    Join Date
    Dec 2006
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    30
    try putting the operator functions outside of the class declaration, since they are not part of the class

    edit: there are two ways of doing operator overloads. The first is as an instance method of a class, then the first argument of the operator is the instance itself, and the other operands are parameters so e.g. for < it would only need one other operand as a parameter. The second is as a global function not part of a class, then it would require all the operands as parameters. This is an example of the second type, since the first operand is istream / ostream, and we are not messing with those classes; so we put them as global functions.
    Last edited by spoon!; 12-15-2006 at 04:24 AM.

  3. #3
    Registered User
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    Dec 2006
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    7
    Thanks spoon for your help

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