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Undefined reference errorsto function declared in header file but defined in Cpp file

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Undefined reference errorsto function declared in header file but defined in Cpp file

 
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  #1
Mar 24th, 2008
Can one of you gurus give me some help please. I am a new programmer so please bear with me. I have a header file called Deck.h and a cpp file called Deck.cpp. In my header file, I have a class called Deck which has prototype function called createPack as one of its member functions. the createPack function is defined in Deck.cpp. I also have a file called PokerEngine.cpp which holds my main function. However, when I create an instance of class Deck and try and call the function createPack, I get undefined reference errors. I have tried using both the "." and "->" operators and I am still getting the errors. I was hoping you guys will be able to help me solve this.

Deck.h header file
C++ Syntax (Toggle Plain Text) 
  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4.  
  5. using namespace std;
  6.  
  7.  
  8. namespace pack{
  9. 	 struct card{
  10.  
  11. 	 		// this holds the description of the card e.g. "King Of"
  12. 	 		std::string card_name;
  13.  
  14. 	 		//card type e.g. "Hearts", Spades, etc
  15. 	 		std::string card_type;
  16. 	 		/*
  17. 	 		 * the value of the card e.g, 2,3 6 etc Note that Jack = 10
  18. 	 		 * Queen = 11, King = 12, Ace = 13
  19. 	 		 */
  20. 	 		int card_value;
  21. 	 		};
  22.  
  23. }
  24. class Deck
  25.  
  26. {
  27. 	pack::card deck;
  28.  
  29. public:
  30. 	Deck();
  31. 	 ~Deck();
  32.  
  33. 		// returns a card
  34. 	pack::card getCard();
  35.  
  36.        // create a card
  37. 	inline void createCard(string card_name, string card_type, int card_value);
  38.  
  39. 	//retutrn a pack of cards as a vector
  40. 	vector  <pack::card>getDeckOfcards();
  41.  
  42. 	//reset a card variable
  43. 	void resetCard(pack::card card);
  44.  
  45. 	//create a pack of cards
  46.  
  47. 	vector <pack::card>createPack();
  48.  
  49. 	};




Deck.cpp file
C++ Syntax (Toggle Plain Text) 
  1. #include "Deck.h"
  2. #include <iostream>
  3. #include <vector>
  4. using namespace std;
  5. using namespace pack;
  6.  
  7.  
  8.  
  9.  
  10. 	/*defines a deck with a return type of deck i.e. Note that 
  11. 	 * the return type deck is from the namespace pack which is declared and defined in
  12. 	 * the the header file "Deck.h"
  13. 	 */ 
  14.  
  15.  extern pack::card deck;
  16.  
  17.  
  18. /*defines a getCard with a return type of deck i.e. Note that 
  19.  * the return type deck is from the namespace pack which is declared and defined in
  20.  * the the header file "Cards.h"
  21.  */ 
  22. pack::card getCard();
  23.  
  24. //vector holding a deck of cards
  25. 	vector <pack::card>deckOfCards;
  26.  
  27. // 
  28. inline void Deck::createCard(string card_name, string card_type, int card_value)
  29. {
  30. 	deck.card_name=card_name; 
  31. 		deck.card_type = card_type; 
  32. 		deck.card_value= card_value;
  33. };
  34.  
  35. //return deck of cards
  36. //vector  <pack::card>getDeckOfcards();
  37.  
  38. //reset a card  variable
  39. //void resetCard(pack::card card);
  40.  
  41. vector <pack::card>Deck::createPack(){
  42.  
  43. 	int type = 0;
  44. 	int value = 2;
  45. 	string card_name, card_type; 
  46. 	int card_value;
  47.  
  48. switch(type){
  49. case 0:
  50. 	card_type = "Heart";
  51. 	break;
  52. case 1:
  53. 	card_type = "Spade";
  54. 	break;
  55.  
  56. case 2:
  57. 	card_type = "Clubs";
  58. 	break;
  59.  
  60. case 3:
  61. 	card_type = "Diamond";
  62. 	break;
  63. }
  64.  
  65. switch(value){
  66.  
  67. case 2: 
  68. card_name = "2 of ";
  69. break;
  70.  
  71. case 3: 
  72. card_name = "3 of ";
  73. break;
  74.  
  75. case 4: 
  76. card_name = "4 of ";
  77. break;
  78.  
  79. case 5: 
  80. card_name = "5 of ";
  81. break;
  82.  
  83. case 6: 
  84. card_name = "6 of ";
  85. break;
  86.  
  87. case 7: 
  88. card_name = "7 of ";
  89. break;
  90.  
  91. case 8: 
  92. card_name = "8 of ";
  93. break;
  94.  
  95. case 9: 
  96. card_name = "9 of ";
  97. break;
  98.  
  99. case 10: 
  100. card_name = "10 of ";
  101. break;
  102.  
  103. case 11: 
  104. card_name = "Jack of ";
  105. break;
  106.  
  107. case 12: 
  108. card_name = "Queen of ";
  109. break;
  110.  
  111. case 13: 
  112. card_name = "King of ";
  113. break;
  114.  
  115. case 14:
  116. card_name = "Ace of ";
  117. break;
  118. }
  119. 	vector <pack::card>::iterator iter;
  120.  for (;type<4;type++){
  121. 	 for (;value<15;value++){
  122. 		deck.card_name = card_name;
  123. 		deck.card_type = card_type;
  124. 		deck.card_value = value;
  125.  
  126. 		 deckOfCards.push_back(deck);
  127. 		 resetCard(deck);
  128.  
  129.  }
  130. 	 value = 2;
  131. }
  132.  return deckOfCards;
  133. }
  134.  
  135.  
  136. Deck::Deck()
  137. {
  138.  
  139.  
  140. }
  141.  
  142. Deck::~Deck()
  143. {
  144. }
  145.  
  146. pack::card Deck::getCard(){
  147.  
  148. 	return deck;
  149. }
  150.  
  151. vector <pack::card> Deck::getDeckOfcards(){
  152. 	return deckOfCards;
  153. }
  154.  
  155.  
  156.  
  157. void Deck::resetCard(pack::card card){
  158. 	card.card_name="";
  159. 	card.card_type= "";
  160. 	card.card_value = 0;
  161. }





PokerEngine.cpp file
C++ Syntax (Toggle Plain Text) 
  1. #include <string.h>
  2. #include "Player.h"
  3. #include "Deck.h"
  4. #include <iostream>
  5. using namespace std;
  6. using namespace pack;
  7.  
  8.  
  9. class Poker{
  10.  
  11. };
  12.  
  13. int main(){
  14.  
  15.  
  16. 	string pl_name = "Player1";
  17. 	int pl_id = 0;
  18. 	Deck *dk; = new Deck;
  19.  
  20. 	dk->createPack();
  21. 	Player *pl = new Player(pl_name, pl_id);	
  22. dk=0;
  23. delete dk;
  24.  
  25.  
  26.  
  27. 	return 0;
  28. }







Compiler Errors


**** Build of configuration Debug for project Poker ****

**** Internal Builder is used for build ****
g++ -O0 -g3 -Wall -c -fmessage-length=0 -oPokerGameEngine.o ..\PokerGameEngine.cpp
..\PokerGameEngine.cpp: In function `int main()':
..\PokerGameEngine.cpp:21: warning: unused variable 'pl'
g++ -O0 -g3 -Wall -c -fmessage-length=0 -oDeck.o ..\Deck.cpp
..\Deck.cpp: In member function `std::vector<pack::card, std::allocator<pack::card> > Deck::createPack()':
..\Deck.cpp:48: warning: unused variable 'card_value'
g++ -oPoker.exe lottery.o PokerGameEngine.o Player.o Deck.o
PokerGameEngine.o: In function `main':
D:/C_Files_02.03.2007/MyOwnDevelopedPrograms/Poker/Debug/../PokerGameEngine.cpp:20: undefined reference to `Deck::createPack()'
collect2: ld returned 1 exit status
Build error occurred, build is stopped
Time consumed: 4250 ms.
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Re: Undefined reference errorsto function declared in header file but defined in Cpp

 
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  #2
Mar 24th, 2008
Change
Deck *dk; = new Deck; in the main() function
To
Deck *dk = new Deck;
バルサミコ酢やっぱいらへんで
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Re: Undefined reference errorsto function declared in header file but defined in Cpp file

 
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  #3
Mar 24th, 2008
Thanks. that was a typo. Anyway, I've resolved the problem. It was a linker error. I just updated my compiler i.e. mingw 3.4.5 to the latest of 5.1.3 and it works now. Thanks for your help anyway.
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