C++

Forum

 
Calling function from class

jynx678 (35)
I was given this class type and am supposed to get input from the user. My error says "undefined reference to clockType::clockType()"
This is the header file
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
26
27
28
29
30
31
32
33
34
35
36
 

class clockType
{ public:
    void setTime(int hours, int minutes, int seconds);
		

    void getTime(int& hours, int& minutes, int& seconds) const;
		

    void printTime() const;
		

    void incrementSeconds();
		

    void incrementMinutes();
		

    void incrementHours();
		

	bool equalTime(const clockType& otherClock) const;
		

    clockType(int hours, int minutes, int seconds);
		

    clockType();
		

  private:
    int hr;  //stores the hours
    int min; //stores the minutes
    int sec; //stores the seconds
};


The cpp file
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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
 
// the source code is from Malik, chapter 1.
//
//clockTypeImp.cpp file

#include <iostream>
#include "clockType.h"
using namespace std;

void clockType::setTime(int hours, int minutes, int seconds)
{
	if(0 <= hours && hours < 24)
		hr = hours;
	else 
		hr = 0;

	if(0 <= minutes && minutes < 60)
		min = minutes;
	else 
		min = 0;

	if(0 <= seconds && seconds < 60)
		sec = seconds;
	else 
		sec = 0;
}

void clockType::getTime(int& hours, int& minutes, int& seconds) const
{
	hours = hr;
	minutes = min;
	seconds = sec;
}

void clockType::printTime() const
{  if(hr < 10)
	   cout<<"0";
	cout<<hr<<":";

	if(min < 10)
	   cout<<"0";
	cout<<min<<":";

	if(sec < 10)
	   cout<<"0";
	cout<<sec<<endl<<endl;
}

void clockType::incrementHours()
{
	hr++;
	if(hr > 23)
 	  hr = 0;
}

void clockType::incrementMinutes()
{
	min++;
	if(min > 59)
	{
	   min = 0;
	   incrementHours(); //increment hours
	}
}

void clockType::incrementSeconds()
{
    sec++;
	if(sec > 59)
	{
	   sec = 0;
	   incrementMinutes(); //increment minutes
	}
}

bool clockType::equalTime(const clockType& otherClock) const
{
   return(hr == otherClock.hr 
 	    && min == otherClock.min 
          && sec == otherClock.sec);
}

clockType::clockType(int hours, int minutes, int seconds)
{
	setTime(hours, minutes, seconds);
}

clockType::clockType()  //default constructor
{
	setTime(0, 0, 0);
}


and this is what I was trying in main
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
 
#include <iostream>
#include "clockType.h"
using namespace std;

int main()
{
    clockType cellPhoneClock;
    clockType myWatch;
    int hrs, mins, secs;

    cout << "Please enter the hours for the cell phone clock.\n";
    cellPhoneClock.setTime(hrs, mins, secs);
    // write your code here!
    return 0;
}
AbstractionAnon (6954)
The "undefined reference" means the linker did not find the implementation of your default constructor.

Are you sure clocktype.cpp got compiled and included in the link step?
jynx678 (35)
To be honest, I'm pretty new to using different files this way. Do you think you could explain how to link it?
AbstractionAnon (6954)
Are you using an IDE or a makefile?
jynx678 (35)
I'm using an IDE (CodeBlocks), but I'm supposed to use a makefile. I just don't know how to do it :/
Topic archived. No new replies allowed.