C++

Forum

 
Class .h .cpp undefined reference understanding problem

foxxiak (5)
Hi

I'm learning cpp by myself and get stuck on classes. I have read some stuff on this forum and my cpp book, but still didn't figure out where is the problem.

Here my code in 3 files:

1
2
3
4
5
6
7
8
9
10
11
12
13
 
//main2.cpp
#include <iostream>
#include <iomanip>
#include "klasy.h"

using namespace std;

int main()
{
	Submarine s;	
	
	return 0;
}


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
//klasy.h
#ifndef KLASY_H
#define KLASY_H 

class Submarine
{
public:
Submarine(int = 0, int = 0, int = 0, int = 0);
private:
	int id_area;
	int speed_max;
	int speed_left;
	int range;
public:
	void resetSpeed();
	void setMaxSpeed(int);
	void moveToArea(int);
};

#endif 


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
//klasy.cpp
#include <iostream>
#include <iomanip>
#include "klasy.h"

Submarine::Submarine(int i1, int 12, int 13, int i4) 
{
	id_area=;i1
	speed_max=i2;
	speed_left=i3;
	range=i4;
}
void Submarine::resetSpeed()
{
	speed_left=speed_max;	
}
void Submarine::setMaxSpeed(int sp);
{
	speed_max=sp;
}
void Submarine::moveToArea(int i)
{
	id_area=i;
}




When im trying to compile it:
$ g++ -o main2 main2.cpp

machine says:
/tmp/ccmIhNGI.o: In function `main':
main2.cpp:(.text+0x31): undefined reference to `Submarine::Submarine(int, int, int, int)'
collect2: error: ld returned 1 exit status
Peter87 (11178)
You must compile all source file (.cpp).

g++ -o main2 main2.cpp klasy.cpp
foxxiak (5)
thanks Peter for fast answer.

result is as below:

$ g++ -o main2 main2.cpp klasy.cpp
klasy.cpp:6:34: error: expected ‘,’ or ‘...’ before numeric constant
klasy.cpp:6:1: error: prototype for ‘Submarine::Submarine(int, int)’ does not match any in class ‘Submarine’
In file included from klasy.cpp:4:0:
klasy.h:5:7: error: candidates are: Submarine::Submarine(const Submarine&)
klasy.h:8:1: error: Submarine::Submarine(int, int, int, int)
klasy.cpp:17:35: error: declaration of ‘void Submarine::setMaxSpeed(int)’ outside of class is not definition [-fpermissive]
klasy.cpp:18:1: error: expected unqualified-id before ‘{’ token
foxxiak (5)
I have removed ";" from line 17 of klasy.cpp, but it didn't help
xenovia12 (658)
Its because of the semicolon right before the body of the function definition of maxspeed.
And the semicolon at line 8 of klasy.cpp
foxxiak (5)
thanks Lorence

output is as below:

$ g++ -o main2 main2.cpp klasy.cpp
klasy.cpp:6:34: error: expected ‘,’ or ‘...’ before numeric constant
klasy.cpp:6:1: error: prototype for ‘Submarine::Submarine(int, int)’ does not match any in class ‘Submarine’
In file included from klasy.cpp:4:0:
klasy.h:5:7: error: candidates are: Submarine::Submarine(const Submarine&)
klasy.h:8:1: error:                 Submarine::Submarine(int, int, int, int)


corrected sourse files are:

1
2
3
4
5
6
7
8
9
10
11
12
13
 
//main2.cpp
#include <iostream>
#include <iomanip>
#include "klasy.h"

using namespace std;

int main()
{
	Submarine s;	
	
	return 0;
}


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
//klasy.h
#ifndef KLASY_H
#define KLASY_H 

class Submarine
{
public:
Submarine(int = 0, int = 0, int = 0, int = 0);
private:
	int id_area;
	int speed_max;
	int speed_left;
	int range;
public:
	void resetSpeed();
	void setMaxSpeed(int);
	void moveToArea(int);
};

#endif 


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
 
//klasy.cpp
#include <iostream>
#include <iomanip>
#include "klasy.h"

Submarine::Submarine(int i1, int 12, int 13, int i4) 
{
	id_area=i1;
	speed_max=i2;
	speed_left=i3;
	range=i4;
}
void Submarine::resetSpeed()
{
	speed_left=speed_max;	
}
void Submarine::setMaxSpeed(int sp)
{
	speed_max=sp;
}
void Submarine::moveToArea(int i)
{
	id_area=i;
}
Peter87 (11178)
On line 6 in klasy.cpp you use 1 instead of i in the names of the second and third parameter.
foxxiak (5)
wow, thats really embarrassing.
problem solved, thanks guys :)
Topic archived. No new replies allowed.