Thread: Compile errors with overloading >> operators

I do not understand why my compiler is saying:
type specifier omitted for parameter

FULL COMPILE ERRORS:
Terms.cpp:12: type specifier omitted for parameter
Terms.cpp:12: parse error before `&'
Terms.cpp:13: `operator >>(...)' must have an argument of class or enumerated type
Terms.cpp:13: `operator >>(...)' must take exactly two arguments
Terms.cpp: In function `class istream & operator >>(...)':
Terms.cpp:32: `istr' undeclared (first use this function)
Terms.cpp:32: (Each undeclared identifier is reported only once
Terms.cpp:32: for each function it appears in.)
Terms.cpp:41: `data' undeclared (first use this function)
Terms.cpp:62: `ture' undeclared (first use this function)

I tried adding:
istream:: istream& operator >> (istream& istr, Term& data)
but that did not work aswell


My .h file includes:

Code:

#ifndef TERMS_H
#define TERMS_H

#include <iostream>

class Terms
{
  public:
          Terms() {};
          // Default constructor

          void SetCoefficient (int a) { coef = a; };
          // Sets coef
          // Pre:  An object Term has been declared
          // Post: coef is set to the number passed in

          void SetExponent (int a) { exp = a; };
          // Sets exp
          // Pre:  An object Term has been declared
          // Post: coef is set to the number passed in

          void SetTermPrint (bool a) { okToPrint = a; };
          // If the string being proccess contains ONLY a + or a -
          // This will be set to false since we do not want to store
          // these items in the linked list with an array of records
          // Pre:  An object Term has been declared
          // Post: If the term is only a + or a - okToPrint is false
          //       else true.

          void SetIfAnX (bool a) { hasAnX = a; };
          // If the term being proccessed contains an X we set a to true
          // Else false. This is neccessary since when we eventually find
          // the polynomials derivative if no exists exist we want to ignore
          // this term since it becomes 0.
          // Pre:  An object Term has been declared
          // Post: If the string being passed in contains an x this sets hasAnX to be true
          //       else false;

          int GetCoefficient () { return coef; };
          // Returns what is stored in coef
          // Post: coef is returned

          int GetExponent () { return exp; };
          // Returns what is stored in exp
          // Post: exp is returned

          bool GetTermPrint() { return okToPrint; };
          // Returns what is stored in okToPrint;
          // Post: okToPrint is reutrned

          bool GetIfAnX () { return hasAnX; };
          // Returns what is stored in hasAnX
          // Post: hasAnX is returned

  private:
          int coef;
          int exp;
          bool okToPrint;
          bool hasAnX;
//        friend istream& operator >> ( istream&, Terms& );
};

istream& operator >> (istream& istr, Terms& data);

#endif

and my .cpp includes

Code:

// Terms.cpp
// This class is used to overload the input operator and set an object Term to have:
// 1) its coefficient
// 2) its exponent
// 3) if it contains an x
// 4) if it is needed to print

#include <stdlib.h>
#include <string>
#include "Terms.h"

istream& operator >> (istream& istr, Term& data)
{
  int number;
  int exponent;
  bool print;
  bool isThere;
  bool isNegative;
  string line;
  string tempNum;
  string tempExp;
  const char* num;
  const char* exp;
  int length;

  isNegative = false;
  print = true;
  isThere = false;
  tempNum = "";
  tempExp = "";

  istr >> line;
  cout << "THE LINE: " << line << endl;

  if ( !istr.fail() )
  {
    if (line == "-")
    {
      isNegative = true;
      print = false;
      data.SetPrint(print);
    }
    else if (line == "+")
    {
      print = false;
      data.SetPrint(print);
    }
    else
    {
      line = line + ";";

      length = line.size();

      for (int i = 0; i < length; i++)
      {
        if( isdigit(line[i]) )
        {
          tempNum = tempNum + line[i];
        }
        else if ( line[i] == 'x' )
        {
          isThere = ture;
          i++;
          if ( line[i] == ';' )
            tempExp = tempExp + "1";
          i--;
          if (tempNum == "" || tempNum == "-")
            tempNum = tempNum + "1";
        }
        else if( line[i] == '^' )
        {
          i++;
          while ( line[i] != ';')
          {
            tempExp = tempExp + line[i];
            i++;
          }
        }
        else if ( line[i] = '-' )
        {
          tempNum = tempNum + line[i];
        }
      }

      if ( tempExp == "" )
        tempExp = "1";

      num = tempNum.c_str();
      exp = tempExp.c_str();

      number = atoi(num);
      exponent = atoi(exp);

      if (isNegative)
      {
        number *= -1;
        isNegative = false;
      }
    }
  }

  data.SetPrint(print);
  data.SetIfAnX(isThere);
  data.SetNumber(number);
  data.SetCoefficient(exponent);


  return istr;
}

Thanks,
Chris

never mind guys I figured this out

For those of you who are interested what I did was I changed the following

the includes in my .h file is now:

Code:

#include <iostream>

and my declaration of the function in the .h is now:

Code:

friend istream& operator>> ( istream&, Terms& )

then in my .cpp I changed the includes to:

Code:

#include <cstdlib>
#include <string>
#include "Terms.h"

then my function call in .cpp to:

Code:

istream& operator >> (istream& istr, Terms& data)

I have no clue what this works... I copied the original directly from a textbook. However our school computers do run of linux. Is it an error with different ways of doing stuff from windows and linux or something else?

I am curious if anyone would know why this worked...

Thanks,
Chris