link.h, link.cpp, bunny.h, bunny.cpp, main.cpp
当我尝试编译我的程序时(使用MVS2013),我得到两个错误; LNK1169:错误3错误LNK1169:找到一个或多个多重定义的符号 和 LNK2005:错误2错误LNK2005:" struct node * curr" (?curr @@ 3PAUnode @@ A)已在list.obj中定义
我不知道错误在哪里,所以我做了一些研究,发现这些错误意味着我已经定义了不止一次,但我无法找到答案。我尝试将所有#includes移动到一个文件中,但这也没有帮助。
我扫描了我的代码,但无法找到符合此错误的任何地方,所以现在我感到难过。
NB!在你因为张贴巨大的文字墙而生我的生气之前,我不知道错误在哪里,所以我认为最好把它全部包括在内
bunny.h
#ifndef BUNNY_H
#define BUNNY_H
#include "stdafx.h"
#include <string>
using namespace std;
class bunny
{
private:
int m_age;
char m_gender;
bool m_radioactiveVampire;
string m_color;
string m_name;
public:
bunny();
void setRadioactiveVampire(bool RV) {m_radioactiveVampire = RV; }
string getName(void) { return m_name; }
string getColor(void) { return m_color; }
bool getRadioactiveVampire(void) { return m_radioactiveVampire; }
char getGender(void) { return m_gender; }
int getAge(void) { return m_age; }
};
#endif
bunny.cpp
#include "stdafx.h"
#include <iostream>
using namespace std;
/* 16 bunnies */ string maleBunnies[] = { "Abel", "Abraham", "Ace", "Acer", "Achilles", "Acker", "Adagio", "Admiral", "Aesop", "Ajax", "Aladdin", "Alaska", "Albert", "Alchemy", "Alex", "Mark" };
/* 16 bunnies */ string femaleBunnies[] = { "Abba", "Aberdeen", "Abigail", "Acura", "Adele", "Adoni", "Aki", "Alibi", "Alice", "Amaretto", "Amaya", "Ambrosia", "Amore", "Amorette", "Anabell", "Anastasia" };
/* 8 colors */ string bunnyColors[] = { "Red", "Black", "Yellow", "Gray", "Green", "White", "Blue", "Purple" };
bunny::bunny()
{
m_age = 0;
m_color = bunnyColors[rand() % 8 + 1];
if (rand() % 2 + 1 == 1) //calculates what gender and name respectively
{
m_gender = 'f';
m_name = femaleBunnies[rand() % 16 + 1];
}
else if (rand() % 2 + 1 == 2)
{
m_gender = 'm';
m_name = maleBunnies[rand() % 16 + 1];
}
else
{
cerr << "Uh oh, something went wrong with gender generation";
}
if (rand() % 100 + 1 < 2) //calculates 2% chance on radioactive vampire
{
m_radioactiveVampire = true;
}
else if (rand() % 100 + 1 > 2)
{
m_radioactiveVampire = false;
}
else
{
cerr << "Uh oh, something went wrong with RV calculation ";
}
}
的main.cpp
#include "stdafx.h"
#include <ctime>
using namespace std;
int main()
{
srand(time(NULL));
bunnyList list;
bunny *b;
for (int i = 0; i < 5; i++)
{
b = new bunny();
list.addBunny(b);
}
return 0;
}
list.h
#ifndef LIST_H
#define LIST_H
#include "bunny.h"
#include "stdafx.h"
typedef struct node
{
node *next;
bunny *data;
} *nodePtr;
nodePtr curr = NULL;
class bunnyList
{
private:
public:
node *head;
bunnyList();
void displayAllBunnies(void);
void addBunny(bunny *b); // linked list stuff
void removeBunny(int bunnyNumber); // linked list stuff
};
#endif
和最后一个list.cpp
#include "stdafx.h"
#include <iostream>
using namespace std;
bunnyList::bunnyList()
{
}
void bunnyList::addBunny(bunny *b)
{
node *newNode = new node; //creates a node and holds its pointer
newNode->data = b;
newNode->next = head;
head = newNode;
}
void bunnyList::displayAllBunnies(void)
{
curr = head;
while (curr != NULL)
{
cout << curr->data << endl;
curr = curr->next;
}
}
(list.h和bunny.h包含在stdafx.h中,这是一个没有帮助的解决方案,但它们都在那里)
答案 0 :(得分:1)
您正在list.h
nodePtr curr = NULL;
在多个翻译单元中插入.h
时,编译器会在翻译单元中报告相同的符号定义。
如果您需要在多个翻译单元中使用该变量,请移动.cpp
的变量,使用extern
(链接一个帖子以及有关extern的更多信息)。
阅读代码时,没有必要将curr
声明为自由变量,它只在displayAllBunnies
中用作迭代变量(可能是本地的)。
将displayAllBunnies更改为:
void bunnyList::displayAllBunnies(void) {
nodePtr curr = head;
while (curr != NULL) {
cout << curr->data << endl;
curr = curr->next;
}
}
从nodePtr curr = NULL;
list.h