//Header FILE:
#ifndef BMI_H_INCLUDED
#define BMI_H_INCLUDED
#include<iostream>
#include<string>
using namespace std;
class BMI{
public:
//default constructer
BMI();
//overloaded
BMI(string,int,double);
private:
string newName;
int newHeight;
double newWeight;
};
#endif // BMI_H_INCLUDED
//Implementation file:
#include "BMI.h"
BMI ::BMI(){
newHeight=0;
newWeight=0.0;
}
BMI::BMI(string name,intheight,double weight){
newName=name;
newHeight=height;
newWeight=weight;
}
//Main file:
#include <iostream>
#include<string>
#include "BMI.h"
using namespace std;
int main()
{
string name;
int height;
double weight;
cout<<"Name:\n";
getline(cin,name);
cout<<"Height(Inches):\n";
cin>>height;
cout<<"Weight(Pounds):";
cin>>weight;
BMI person_1("John",89,90.0);
//I get the error on the above line error is //undefinedreferenceto`BMI::BMI(std::string, int, double)'
}
Does anyone have any idea why this keeps happening to me?
I use Codeblocks and if so how can I fix this and prevent it from happening again.
This happens every time I separate classes into headers and cpp files. This is just one of the many times my program fails to compile due to this.
in BMI::BMI(string name,intheight,double weight){ theres no space between int and height.
This causes BMI person_1("John",89,90.0); to refer to a constructor that doesn't exist.
Related
So I have two classes - Dvd and DvdGroup. DvdGroup basically manages an array of dvds and provide manipulative member functions for that class. The problem is whenever I try to compile DvdGroup.cc using the command 'g++ -c Dvd.Group.cc', I get a bunch of errors all related to not having 'Dvd' declared and I'm not sure why.
Here are some errors below:
DvdGroup.h:14:12: error: ‘Dvd’ has not been declared void add(Dvd*);
DvdGroup.h:18:3: error: ‘Dvd’ does not name a type Dvd* dvdCollection[MAX_DVDS];
DvdGroup.cc: In copy constructor ‘DvdGroup::DvdGroup(DvdGroup&)’:
DvdGroup.cc:15:6: error: ‘Dvd’ was not declared in this scope for(Dvd d: dvds){
I feel like I'm missing something and they could all be fixed by one solution because they all involve having the Dvd class undeclared but I can't seem to figure out what. I was wondering if anyone could tell me what I'm doing wrong? I would really appreciate any help with fixing this.
DvdGroup.cc:
#include <iostream>
using namespace std;
#include "DvdGroup.h"
DvdGroup::DvdGroup(int n){
numDvds = n;
}
DvdGroup::DvdGroup(DvdGroup& dvds){
numDvds = dvds.numDvds;
for(Dvd d: dvds){
Dvd newDvd = Dvd;
}
}
DvdGroup::~DvdGroup(){
//code
}
void DvdGroup::add(Dvd* d){
//code
}
DvdGroup.h:
#ifndef DVDGROUP_H
#define DVDGROUP_H
#define MAX_DVDS 15
#include <string>
using namespace std;
class DvdGroup
{
public:
DvdGroup(int);
DvdGroup(DvdGroup&);
~DvdGroup();
void add(Dvd*);
private:
Dvd* dvdCollection[MAX_DVDS];
int numDvds;
};
#endif
Don't know if the Dvd header file is needed, but here:
Dvd.h:
#ifndef DVD_H
#define DVD_H
#define MAX_DVDS 15
#include <string>
class Dvd{
public:
Dvd(string, int);
void set(string, int);
Dvd(Dvd&);
int getYear();
~Dvd();
void print();
private:
string title;
int year;
};
#endif
What you need to do is to provide Dvd class definition for DvdGroup class. It is needed to know what type of symbol is this. Solution for your problem should be addition of:
#include "Dvd.h"
line to DvdGroup.h file.
I have this annoying error;
Undefined Reference to Shape::Shape(...), Shape::getName(...), Shape::getAge(...)
My Main.cpp is this
#include <iostream>
#include <string>
#include "Bit.h"
using namespace std;
int main()
{
//simple assignment
string name;
int age;
cout<<"enter name: ";
cin>>name;
cout<<"enter age: ";
cin>>age;
Shape sh(name,age); //class declaration (i think here is the problem)
cout<<endl<<"name: "<<sh.getName();
cout<<endl<<"age: "<<sh.getAge();
return 0;
}
This is the Bit.h header
#include <iostream>
#include <string>
using namespace std;
#ifndef BIT_H
#define BIT_H
//creating class
class Shape{
string newName;
int newAge;
public:
//Default Constructor
Shape();
//Overload Constructor
Shape(string n,int a);
//Destructor
~Shape();
//Accessor Functions
string getName();
int getAge();
};
And finally, this is the Bit.cpp
#include "Bit.h"
//constructors and destructor
Shape::Shape(){
newName="";
newAge=0;
}
Shape::Shape(string n, int a){
newName=name;
newAge=age;
}
Shape::~Shape(){
}
string Shape::getName(){
return newName;
}
//getters
int Shape::getAge(){
return newAge;
}
I understand, that this might be a very simple problem/error, but I have been struggling for about 2 hours.
I suppose that the error is in the declaration od "sh" object, even if I declare it like this "Shape sh();" or "Shape sh;", there are still errors.
Thanks
EDIT. GNU GCC Compiler
EDIT2. Using Code Blocks (sorry for forgetting all these)
You're probably not compiling Bit.cpp, but only Main.cpp.
Considering that Bit.h, Bit.cpp and Main.cpp are in the same folder, here is how you should compile it :
g++ *.cpp
It will still not compile, as in the default constructor, you're trying to initialize name, and age which both don't exist.
You probably meant newAge, and newName?
In the other Constructor, name and age also don't exist, you probably meant n, and a?
I'm still a noobie in c++ so I am not to skilled in debugging yet. Just trying to figure out how to fix this compilation error.
CruiseShip.cpp:11: error: expected ‘)’ before ‘n’
CruiseShip.cpp
#include "CruiseShip.h"
#include "Ship.h"
#include <iostream>
using namespace std;
Ship s;
int passengers;
CruiseShip(string n, string y, int p) : Ship(n,y)
{
passengers=p;
}
void print()
{
cout<<"Name: "<<s.getName()<<"\nMaximum passengers:"<<passengers<<endl;
cout<<"-------------------------"<<endl;
}
CruiseShip.h
#ifndef CRUISESHIP_H
#define CRUISESHIP_H
#include "Ship.h"
#include <string>
using namespace std;
//class Ship;
class CruiseShip:public Ship{
private:
int passengers;
Ship::Ship s;
public:
CruiseShip(string, string, int);
virtual void print();
};
#endif
Ship.h
#ifndef SHIP_H
#define SHIP_H
#include <string>
using namespace std;
class Ship{
private:
string name;
string built;
public:
Ship();
Ship(string, string);
string getName();
string getBuilt();
virtual void print();
};
#endif
You have 3 errors:
1 and 2. You don't declare print and CruiseShip (The constructor) as part of the class CruiseShip when you define them. You need to:
CruiseShip::CruiseShip(string n, string y, int p) : Ship(n,y) {
virtual void CruiseShip::print() {
3, you dont have a namespace Ship so this is unnecessary:
Ship::Ship s; // This only needs to be Ship s <- NameSpace::ObjectType nameOfObject;
After this it will compile http://ideone.com/wJ6mPO. It will not link however, because you have undefined references to all of the functions you have yet to define.
I'm having a problem with method declaration. I'm really new to C++ so I was hoping somebody could help. I'm including my header and part of. my source file
#ifndef HEADER_H
#define HEADER_H
#include <fstream>
using namespace std;
class employee
{
public:
void readData(ifstream & inf);
void Compute (int bp);
void print (ofstream & outf) const;
employee();
private:
int ID;
int Job_class;
int Years;
int Ed;
float sal;
};
#endif
Now the source file, I'm getting the error at void employee :: readData(ifstream&inf)
Member Declaration not found. What am I missing here
#include <iostream>
#include <fstream>
#include <iomanip>
#include "employee.h"
using namespace std;
void employee ::readData(ifstream& inf)
{
inf >> ID >> Job_class >> Years >> Ed;
I've spent quite a few hours researching and trying to figure out why I'm getting this error. Basically the three files that have to do with the inheriting are CollegeMember.h, Employee.h, and EmpAcademicRecord.h. Employee. is inheriting from CollegeMember.h and EmpAcademicRecord.h is inheriting from Employee.h. Like this CollegeMember <- Employee <- EmpAcademicRecord. The error occurs in EmpAcademicRecord.h. Heres the three files.
CollegeMember.h
#include <cstdlib>
#include <iostream>
#include<ctype.h>
#include<string.h>
#include "Employee.h"
#include "Student.h"
using namespace std;
// ****************************************************************************
// Class Definitions follow
typedef char* String;
// The CollegeMember class
class CollegeMember
{
protected:
int ID_Number;
string FirstName, LastName;
string AddressLine1, AddressLine2, StateProv, Zip;
string Telephone;
string E_Mail;
string answer, answer2, answer3, answer4;//used as sort of booleans for use with validation
// member functions
public:
CollegeMember ( ); // constructor
CollegeMember(const CollegeMember&); //overloaded constructor
void Modify (CollegeMember Member);
void InputData(int x);
string Summary ( ); //summary
string PrintMe(); //fully describes
}; // End of CollegeMember class declaration
Employee.h
#include <cstdlib>
#include <iostream>
#include<ctype.h>
#include<string.h>
#include "EmpAcademicRecord.h"
#include "EmpEmploymentHistory.h"
#include "EmpExtraCurricular.h"
#include "EmpPersonalInfo.h"
#include "EmpPublicationLog.h"
using namespace std;
// ****************************************************************************
// Class Definitions follow
typedef char* String;
// The Employee Class
class Employee: protected CollegeMember
{
float Salary;
protected:
string Department, JobTitle;
// Member Functions
public:
Employee ( ); // constructor
void Modify (Employee ThisEmp);
void InputData(int x);
void SetSalary (float Sal) // Specified as an in-line function
{ Salary = Sal;}
float GetSalary ( ) {return Salary;} // Specified as an in-line function
string Summary ( ); //summary
string PrintMe(); //fully describes
}; // End of Employee class declaration
EmpAcademicRecord.h
#include <iostream>
#include <cstdlib>
#include<ctype.h>
#include<string.h>
using namespace std;
typedef char* String;
class EmpAcademicRecord: protected Employee{ //error occurs on this line
protected:
int ReferenceNumber;
string Institution;
string Award;
string start;
string end;
public:
EmpAcademicRecord();
void InputData (int x);
void Modify(EmpAcademicRecord ThisRec);
void Summary();
};
Any help with this would be greatly appreciated.
That sort of error is usually caused by the type not being defined when you try to use it.
In this case, it appears that you may have included EmpAcademicRecord.h without having first included Employee.h (the includes at the top of the former do not show the latter).
In other words, at the point where the compiler sees:
class EmpAcademicRecord: protected Employee { //error occurs on this line
it has no idea what the Employee class is.
It may be a simple matter of adding:
#include "Employee.h"
to the top of that file, it's a little difficult to be certain since we don't have the code files. In any case, it's certainly a good first step.
Since you have EmpAcademicRecord.h being included by Employee.h, that will probably result in an infinite recursion.
You could fix that with include guards, but I can't see why you need that particulat inclusion. EmpAcademicRecord depends on Employee, not the other way around.