Hi there guys,
I'm studying C++ with Deitel "C++ How To Program" and I've done a small "gradebook" program. However I've a problem: when I try tu build&run my program I've an error:
C:\Users\Alberto\AppData\Local\Temp\ccSdybij.o:main.cpp|| multiple definition of `main'|
obj\Debug\main.o:C:\Users\Alberto\Documents\Progetti C++ CodeBlocks\ConsoleApplication24\main.cpp|10|first defined here|
||=== Build finished: 2 errors, 0 warnings ===|
Here's my simple program:
gradebook.h
#include <string>
using std::string;
class GradeBook
{
    public:
    GradeBook( string ); 
    void setCourseName( string ); 
    string getCourseName(); 
    void displayMessage(); 
    private:
    string courseName;
}; 
gradebook.cpp
#include <iostream>
using std::cout;
using std::endl;
#include "GradeBook.h" 
GradeBook::GradeBook( string name )
{
    setCourseName( name ); 
} 
void GradeBook::setCourseName( string name )
{
    if ( name.length() <= 25 )
    courseName = name; 
    if ( name.length() > 25 )
    {
        
        courseName = name.substr( 0, 25 ); 
        cout << "Name \"" << name << "\" exceeds maximum lenght (25).\n" << "Limiting courseName to first 25 characters.\n" << endl;
        
    } 
} 
string GradeBook::getCourseName()
{
    return courseName;
} 
void GradeBook::displayMessage()
{
    
    cout << "Welcome to the GradeBook for\n" << getCourseName() << "!" << endl;
} 
Main.cpp
#include <iostream>
using std::cout;
using std::endl;
#include "GradeBook.h"
int main()
{
    //creazione di due oggetti GradeBook
    GradeBook gradeBook1( "CS101 Introduction to C++ Programming" );
    GradeBook gradeBook2( "CS102 Data Structures in C++" );
   
    cout << "gradeBook1's initial name is: " << gradeBook1.getCourseName() << "\ngradeBook2's initial name is: " << gradeBook2.getCourseName() << endl;
    
    gradeBook1.setCourseName( "CS101 C++ Programming" );
   
    cout << "\ngradeBook1's course name is: " << gradeBook1.getCourseName() << "\ngradeBook2's course name is: " << gradeBook2.getCourseName() << endl;
    return 0;
} 
In my "Linker Settings" I've included both gradebook.h and gradebook.cpp files but that doesn't help
Thank you,
otreblA