I have been working with this code for a better part of the day and I can't
figure out where I am making a mistake. I can only imagine it is when I
declare multiple paramaters on the constructor because the program compiles
with just one parameter. Can someone look at this and tell me where I made
my error?
This is the error I get while trying to compile.
error C2664: 'GradeBook::Gra deBook(const GradeBook &)' : cannot convert
parameter 1 from 'const char [38]' to 'const GradeBook &'
Reason: cannot convert from 'const char [38]' to 'const GradeBook'
No constructor could take the source type, or constructor overload
resolution was ambiguous
Thanks
// GradeBook.cpp
// GradeBook member-function definitions. This file contains
// implementations of the member functions prototyped in GradeBook.h.
#include <iostream>
using std::cout;
using std::endl;
#include "GradeBook. h" // include definition of class GradeBook
// constructor initializes courseName and instructorName with string
supplied as argument
GradeBook::Grad eBook(string name, string instructor)
{
setCourseName( name ); // call set function to initialize courseName
setInstructorNa me( instructor );// call set function to initialize
instructorName
} // end GradeBook constructor
// function to set the course name
void GradeBook::setC ourseName( string name )
{
courseName = name; // store the course name in the object
} // end function setCourseName
// function to get the course name
string GradeBook::getC ourseName()
{
return courseName; // return object's courseName
} // end function getCourseName
// function to set the instructor name
void GradeBook::setI nstructorName( string instructor )
{
instructorName = instructor; // store the instructor name in the object
} // end function setInstructorNa me
// function to get the instructor name
string GradeBook::getI nstructorName()
{
return instructorName; // return object's instructorName
} // end function getInstructorNa me
// display a welcome message to the GradeBook user
void GradeBook::disp layMessage()
{
// call getCourseName and getInstructorNa me to get the courseName and
instructorName
cout << "Welcome to the grade book for\n" << getCourseName()
<< "!" << endl;
cout << "This course is presented by:\n" << getInstructorNa me()
<< "!" << endl;
} // end function displayMessage
This is the header file
// GradeBook.h
// GradeBook class definition. This file presents GradeBook's public
// interface without revealing the implementations of GradeBook's member
// functions, which are defined in GradeBook.cpp.
#include <string> // class GradeBook uses C++ standard string class
using std::string;
// GradeBook class definition
class GradeBook
{
public:
GradeBook( string, string ); // constructor that initializes courseName and
instructorName
void setCourseName( string ); // function that sets the course name
string getCourseName() ; // function that gets the course name
void setInstructorNa me( string ); // function that sets the Instructor name
string getInstructorNa me(); // function that gets the Instructor name
void displayMessage( ); // function that displays a welcome message
private:
string courseName; // course name for this GradeBook
string instructorName; // Instructor name for this GradeBook
}; // end class GradeBook
10  2024 
B Williams wrote: I have been working with this code for a better part of the day and I can't
figure out where I am making a mistake. I can only imagine it is when I
declare multiple paramaters on the constructor because the program compiles
with just one parameter. Can someone look at this and tell me where I made
my error?
This is the error I get while trying to compile.
error C2664: 'GradeBook::Gra deBook(const GradeBook &)' : cannot convert
parameter 1 from 'const char [38]' to 'const GradeBook &'
Reason: cannot convert from 'const char [38]' to 'const GradeBook'
No constructor could take the source type, or constructor overload
resolution was ambiguous
Somewhere you are attempting to copy a GradeBook object and you don't
have a copy constructor.
A couple points of style:
Way way too many superfluous comments. Just give things meaningful
names and let the code tell its own story.
Never ever put a using directive in a header.
--
Ian Collins.
B Williams wrote: I have been working with this code for a better part of the day and I
can't figure out where I am making a mistake. I can only imagine it
is when I declare multiple paramaters on the constructor because the
program compiles with just one parameter. Can someone look at this
and tell me where I made my error?
This is the error I get while trying to compile.
error C2664: 'GradeBook::Gra deBook(const GradeBook &)' : cannot
convert parameter 1 from 'const char [38]' to 'const GradeBook &'
Reason: cannot convert from 'const char [38]' to 'const GradeBook'
Which line of the code you have posted does this message relate to?
No constructor could take the source type, or constructor overload
resolution was ambiguous
Thanks
// GradeBook.cpp
// GradeBook member-function definitions. This file contains
// implementations of the member functions prototyped in GradeBook.h.
#include <iostream>
using std::cout;
using std::endl;
#include "GradeBook. h" // include definition of class GradeBook
// constructor initializes courseName and instructorName with string
supplied as argument
GradeBook::Grad eBook(string name, string instructor)
{
setCourseName( name ); // call set function to initialize courseName
setInstructorNa me( instructor );// call set function to initialize
instructorName
} // end GradeBook constructor
// function to set the course name
void GradeBook::setC ourseName( string name )
{
courseName = name; // store the course name in the object
} // end function setCourseName
// function to get the course name
string GradeBook::getC ourseName()
{
return courseName; // return object's courseName
} // end function getCourseName
// function to set the instructor name
void GradeBook::setI nstructorName( string instructor )
{
instructorName = instructor; // store the instructor name in the
object
} // end function setInstructorNa me
// function to get the instructor name
string GradeBook::getI nstructorName()
{
return instructorName; // return object's instructorName
} // end function getInstructorNa me
// display a welcome message to the GradeBook user
void GradeBook::disp layMessage()
{
// call getCourseName and getInstructorNa me to get the courseName and
instructorName
cout << "Welcome to the grade book for\n" << getCourseName()
<< "!" << endl;
cout << "This course is presented by:\n" << getInstructorNa me()
<< "!" << endl;
} // end function displayMessage
This is the header file
// GradeBook.h
// GradeBook class definition. This file presents GradeBook's public
// interface without revealing the implementations of GradeBook's
member
// functions, which are defined in GradeBook.cpp.
#include <string> // class GradeBook uses C++ standard string class
using std::string;
// GradeBook class definition
class GradeBook
{
public:
GradeBook( string, string ); // constructor that initializes
courseName and instructorName
void setCourseName( string ); // function that sets the course name
string getCourseName() ; // function that gets the course name
void setInstructorNa me( string ); // function that sets the
Instructor name
string getInstructorNa me(); // function that gets the Instructor name
void displayMessage( ); // function that displays a welcome message
private:
string courseName; // course name for this GradeBook
string instructorName; // Instructor name for this GradeBook
}; // end class GradeBook
V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask
B Williams wrote: I have been working with this code for a better part of the day and I can't
figure out where I am making a mistake. I can only imagine it is when I
declare multiple paramaters on the constructor because the program compiles
with just one parameter. Can someone look at this and tell me where I made
my error?
Please read the FAQ for this newsgroup, specifically the section on how
to post. You need to post complete, compilable, minimal code which
illustrates the problem. The code you posted does not even include a
main() function. I took the time to read through it in spite of this
and do not think you've posted the line of code which is causing the
error. It would be helpful if you identified which line the error was
talking about, too.
Also, I concur with the other poster regarding your use of comments --
a comment which does nothing more than state something like "call
getFoo to get the Foo" is worse than useless. I'll further add that
having getFoo() and setFoo() for your private Foo member is essentially
no better in terms of design than just making that member public, but
you'll have time to appreciate such design subtleties after you've
gained more mastery of the language fundamentals.
Luke
This is the code that contains the main. The error is occuring at both of
these lines.
GradeBook courseName( "CS101 Introduction to C++ Programming" );
GradeBook instructorName( "Mr Johnson");
#include <iostream>
using std::cout;
using std::endl;
#include "GradeBook. h" // include definition of class GradeBook
// function main begins program execution
int main()
{
// create two GradeBook objects
GradeBook courseName( "CS101 Introduction to C++ Programming" );
GradeBook instructorName( "Mr Johnson");
// display initial value of courseName for each GradeBook
cout << "gradeBook1 created for course: " << courseName.getC ourseName()
<< "\nThe instructor for this course is: " <<
instructorName. getInstructorNa me()
<< endl;
return 0; // indicate successful termination
} // end main
"Victor Bazarov" <v.********@com Acast.net> wrote in message
news:e8******** **@news.datemas .de... B Williams wrote: I have been working with this code for a better part of the day and I
can't figure out where I am making a mistake. I can only imagine it
is when I declare multiple paramaters on the constructor because the
program compiles with just one parameter. Can someone look at this
and tell me where I made my error?
This is the error I get while trying to compile.
error C2664: 'GradeBook::Gra deBook(const GradeBook &)' : cannot
convert parameter 1 from 'const char [38]' to 'const GradeBook &'
Reason: cannot convert from 'const char [38]' to 'const GradeBook'
Which line of the code you have posted does this message relate to?
No constructor could take the source type, or constructor overload
resolution was ambiguous
Thanks
// GradeBook.cpp
// GradeBook member-function definitions. This file contains
// implementations of the member functions prototyped in GradeBook.h.
#include <iostream>
using std::cout;
using std::endl;
#include "GradeBook. h" // include definition of class GradeBook
// constructor initializes courseName and instructorName with string
supplied as argument
GradeBook::Grad eBook(string name, string instructor)
{
setCourseName( name ); // call set function to initialize courseName
setInstructorNa me( instructor );// call set function to initialize
instructorName
} // end GradeBook constructor
// function to set the course name
void GradeBook::setC ourseName( string name )
{
courseName = name; // store the course name in the object
} // end function setCourseName
// function to get the course name
string GradeBook::getC ourseName()
{
return courseName; // return object's courseName
} // end function getCourseName
// function to set the instructor name
void GradeBook::setI nstructorName( string instructor )
{
instructorName = instructor; // store the instructor name in the
object
} // end function setInstructorNa me
// function to get the instructor name
string GradeBook::getI nstructorName()
{
return instructorName; // return object's instructorName
} // end function getInstructorNa me
// display a welcome message to the GradeBook user
void GradeBook::disp layMessage()
{
// call getCourseName and getInstructorNa me to get the courseName and
instructorName
cout << "Welcome to the grade book for\n" << getCourseName()
<< "!" << endl;
cout << "This course is presented by:\n" << getInstructorNa me()
<< "!" << endl;
} // end function displayMessage
This is the header file
// GradeBook.h
// GradeBook class definition. This file presents GradeBook's public
// interface without revealing the implementations of GradeBook's
member
// functions, which are defined in GradeBook.cpp.
#include <string> // class GradeBook uses C++ standard string class
using std::string;
// GradeBook class definition
class GradeBook
{
public:
GradeBook( string, string ); // constructor that initializes
courseName and instructorName
void setCourseName( string ); // function that sets the course name
string getCourseName() ; // function that gets the course name
void setInstructorNa me( string ); // function that sets the
Instructor name
string getInstructorNa me(); // function that gets the Instructor name
void displayMessage( ); // function that displays a welcome message
private:
string courseName; // course name for this GradeBook
string instructorName; // Instructor name for this GradeBook
}; // end class GradeBook
V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask
Thanks guys,
I included the code that included the main. What is really confusing me is
that if I remove all lines refering to the instructor, it compiles fine.
Thanks again for your assistance.
"Luke Meyers" <n.***********@ gmail.com> wrote in message
news:11******** **************@ y41g2000cwy.goo glegroups.com.. . B Williams wrote: I have been working with this code for a better part of the day and I
can't
figure out where I am making a mistake. I can only imagine it is when I
declare multiple paramaters on the constructor because the program
compiles
with just one parameter. Can someone look at this and tell me where I
made
my error?
Please read the FAQ for this newsgroup, specifically the section on how
to post. You need to post complete, compilable, minimal code which
illustrates the problem. The code you posted does not even include a
main() function. I took the time to read through it in spite of this
and do not think you've posted the line of code which is causing the
error. It would be helpful if you identified which line the error was
talking about, too.
Also, I concur with the other poster regarding your use of comments --
a comment which does nothing more than state something like "call
getFoo to get the Foo" is worse than useless. I'll further add that
having getFoo() and setFoo() for your private Foo member is essentially
no better in terms of design than just making that member public, but
you'll have time to appreciate such design subtleties after you've
gained more mastery of the language fundamentals.
Luke
B Williams wrote: This is the code that contains the main. The error is occuring at
both of these lines.
GradeBook courseName( "CS101 Introduction to C++ Programming" );
GradeBook instructorName( "Mr Johnson");
[..]
Your class 'GradeBook' has a constructor that takes 2 strings. You
only provide a single string literal in both of those cases.
V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask
B Williams schrieb: This is the code that contains the main. The error is occuring at both of
these lines.
GradeBook courseName( "CS101 Introduction to C++ Programming" );
GradeBook instructorName( "Mr Johnson");
[snipped some code]
Why do you write a class, that holds a course name and an instructor
name and then instantiate two objects, one using only the course name
and the other using only the instructor name?
Thats like buying two cars: one to get to work, one to get home.
Another thing: Do you know about whitespaces and indentation? Its very
usefull to understand your code.
Thomas
B Williams wrote: Thanks guys,
I included the code that included the main. What is really confusing me is
that if I remove all lines refering to the instructor, it compiles fine.
Thanks again for your assistance.
You're welcome. As others have indicated, the problem is that you're
not calling your constructor correctly. Your constructor is declared
with two arguments, so you must pass two arguments (of appropriate
types).
Also, don't top-post.
Also, though it was entirely obvious, when asking for help with
homework you should explicitly state that this is the case, to avoid
the appearance of impropriety and the chance that someone will provide
so much information that you fail to learn what you're supposed to.
Luke
I would like to thank everyone for their assistance. I didn't know the rules
to this news group. I would really like to read them because taking an
online programming class can be painful when you try to ask for assistance
and have to wait hours/days for the instructor to respond. I have corrected
my code to pass two arguments. It now compiles. I am off to the next
program.
"Luke Meyers" <n.***********@ gmail.com> wrote in message
news:11******** **************@ d56g2000cwd.goo glegroups.com.. . B Williams wrote: Thanks guys,
I included the code that included the main. What is really confusing me
is
that if I remove all lines refering to the instructor, it compiles fine.
Thanks again for your assistance.
You're welcome. As others have indicated, the problem is that you're
not calling your constructor correctly. Your constructor is declared
with two arguments, so you must pass two arguments (of appropriate
types).
Also, don't top-post.
Also, though it was entirely obvious, when asking for help with
homework you should explicitly state that this is the case, to avoid
the appearance of impropriety and the chance that someone will provide
so much information that you fail to learn what you're supposed to.
Luke This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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