私は C++ プロジェクトに取り組んでおり、これまで実際にヘッダー ファイルを使用したことがありません。プロジェクトをビルドしようとしていますが、いくつかのリンカー エラーが発生しています。それらが何であるか、またはそれらを修正する方法がわかりません!
エラーは次のとおりです。
エラー 4 エラー LNK1120: 3 つの未解決の外部 C:\Users\Stephen\Downloads\08227_ACW2_TestHarness_12-13\08227_ACW2_TestHarness_12-13\Debug\08227_ACW.exe 1 1 08227_ACW
エラー 3 エラー LNK2019: 未解決の外部シンボル "
public: bool __thiscall ArrayStorage::exists(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)
" (?exists@ArrayStorage@@QAE_NV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) が参照されていますfunction _main C:\Users\Stephen\Downloads\08227_ACW2_TestHarness_12-13\08227_ACW2_TestHarness_12-13\main.obj 08227_ACWエラー 2 エラー LNK2019: 未解決の外部シンボル "
public: bool __thiscall ArrayStorage::stdExists(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)
" (?stdExists@ArrayStorage@@QAE_NV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) が参照されていますfunction _main C:\Users\Stephen\Downloads\08227_ACW2_TestHarness_12-13\08227_ACW2_TestHarness_12-13\main.obj 08227_ACWエラー 1 エラー LNK2019: 未解決の外部シンボル "
public: bool __thiscall LinkedListStorage::exists(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)
" (?exists@LinkedListStorage@@QAE_NV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) が参照されていますfunction _main C:\Users\Stephen\Downloads\08227_ACW2_TestHarness_12-13\08227_ACW2_TestHarness_12-13\main.obj 08227_ACW
周りを読んでみると、それらはある種のリンカーエラーですが、実際の問題が何であるかはまったくわかりません。コードを掲載することが役立つかどうかさえわかりません。
前もって感謝します!
編集:
ヘッダファイル:
ArrayStorage.h
#ifndef mao
#define mao
#include <fstream>
#include <string>
#include <iostream>
#include <algorithm>
using namespace std;
class ArrayStorage
{
private:
string* storageArray;
int aSize;
public:
void read(ifstream& iFile);
void write(ofstream& oFile);
bool exists(string target);
bool stdExists(string target);
friend ofstream& operator<<(ofstream& OS, ArrayStorage& SA);
friend ifstream& operator>>(ifstream& IS, ArrayStorage& SA);
};
#endif
LinkedListStorage.h
#ifndef lao
#define lao
#include <fstream>
#include <string>
#include <iostream>
#include <algorithm>
using namespace std;
class LinkedListStorage
{
private:
void addnode(string line);
void sort();
typedef struct node;
public:
node *root;
int size;
void read(ifstream& iFile);
void write(ofstream& oFile);
bool exists(string target);
friend ofstream& operator<<(ofstream& OS,LinkedListStorage& LLS);
friend ifstream& operator>>(ifstream& IS, LinkedListStorage& LLS);
};
#endif
main.ccp
#include <fstream>
#include <iostream>
using namespace std;
// *****************************
// you need to create these classes
// *****************************
#include "ArrayStorage.h"
#include "LinkedListStorage.h"
int main(int argc, char **argv) {
string find = "pixel";
// ######################################################
// #################### ArrayStorage ####################
// ######################################################
// ***********************************
// sort read & exists
// ***********************************
ifstream fin1("ACW2_data.txt");
ofstream out1("1-In-SortedRead.txt");
if(!fin1.is_open())
{
cout << "FAIL" << endl;
return 1;
}
ArrayStorage arrayStorage1;
// read in values into data structure
arrayStorage1.read(fin1);
// output values in data structure to file
arrayStorage1.write(out1);
fin1.close();
out1.close();
// find an item in the data structure using own search method
if(arrayStorage1.exists(find)) {
cout << find.c_str() << " found exists()" << endl;
} else {
cout << find.c_str() << " not found exists()" << endl;
}
// find an item in the data structure using std::count method
if(arrayStorage1.stdExists(find)) {
cout << find.c_str() << " found stdExists()" << endl;
} else {
cout << find.c_str() << " not found stdExists()" << endl;
}
// *********************************
// sort read & then copy constructor
// *********************************
ifstream fin2("ACW2_data.txt");
ofstream out2("2-Out-CopyConstructor.txt");
if(!fin2.is_open())
{
cout << "FAIL" << endl;
return 1;
}
ArrayStorage arrayStorage2;
// read in values into data structure
arrayStorage2.read(fin2);
ArrayStorage arrayStorage3 = arrayStorage2;
// output values in data structure to a file
arrayStorage3.write(out2);
fin2.close();
out2.close();
// *************************************
// >> read & then << write
// *************************************
ifstream fin3("ACW2_data.txt");
ofstream out3("3-In-OperatorRead.txt");
ofstream out4("4-Out-OperatorWrite.txt");
if(!fin3.is_open())
{
cout << "FAIL" << endl;
return 1;
}
ArrayStorage arrayStorage4;
fin3 >> arrayStorage4;
arrayStorage4.write(out3);
out4 << arrayStorage4;
fin3.close();
out3.close();
out4.close();
// ###########################################################
// #################### LinkedListStorage ####################
// ###########################################################
// ***********************************
// sort read & exists
// ***********************************
ifstream fin4("ACW2_data.txt");
ofstream out5("5-In-SortedRead.txt");
if(!fin4.is_open())
{
cout << "FAIL" << endl;
return 1;
}
LinkedListStorage llStorage1;
// read in values into data structure
llStorage1.read(fin4);
// output values in data structure to file
llStorage1.write(out5);
fin4.close();
out5.close();
// find an item in the data structure using own search method
if(llStorage1.exists(find)) {
cout << find.c_str() << " found exists()" << endl;
} else {
cout << find.c_str() << " not found exists()" << endl;
}
// *********************************
// sort read & then copy constructor
// *********************************
ifstream fin5("ACW2_data.txt");
ofstream out6("6-Out-CopyConstructor.txt");
if(!fin5.is_open())
{
cout << "FAIL" << endl;
return 1;
}
LinkedListStorage llStorage2;
// read in values into data structure
llStorage2.read(fin5);
LinkedListStorage llStorage3 = llStorage2;
// output values in data structure to a file
llStorage3.write(out6);
fin5.close();
out6.close();
// *************************************
// >> read & then << write
// *************************************
ifstream fin6("ACW2_data.txt");
ofstream out7("7-In-OperatorRead.txt");
ofstream out8("8-Out-OperatorWrite.txt");
if(!fin6.is_open())
{
cout << "FAIL" << endl;
return 1;
}
LinkedListStorage llStorage4;
fin6 >> llStorage4;
llStorage4.write(out7);
out8 << llStorage4;
fin6.close();
out7.close();
out8.close();
cout << endl << "Finished" << endl;
int keypress; cin >> keypress;
return 0;
}
LinkedListStorage.ccp
#include <fstream>
#include <string>
#include <iostream>
#include <algorithm>
using namespace std;
class LinkedListStorage
{
private:
//methods
//variables
typedef struct node
{
string word;// data
node *next; //address of next node
};
node *root; //root node
int size; //size of datafile
public:
//methods
void addnode(string line)
{
node *temp, *temp2;
temp = new node;
temp->word = line;
temp->next = NULL;
if(root == NULL)
root = temp;
else
{
temp2 = root;
while(temp2->next != NULL)
temp2 = temp2->next;
temp2->next = temp;
}
}
void sort()//simple bubblesort
{
node *temp, *temp2;
temp = new node;
temp2 = new node;
string spare = 0;
for( temp = root; temp!=NULL;temp = temp->next)
{
if(temp->word > temp2->word)
{
spare = temp->word;
temp->word = temp2->word;
temp2->word = spare;
}
}
}
void read(ifstream& iFile)
{
size = 0;
string line;
if(iFile.is_open())
{
while(std::getline(iFile, line))
++size; //Figures out the size for the dynamic array
}
root = new node;
root->next = 0;//null
root->word = ""; //no data yet
for (int i = 0; i < size; i++)
{
if(i<3)
iFile.ignore();
getline(iFile,line);
addnode(line);
sort();
}
}
void write(ofstream& oFile)
{
node *temp;
temp = root;
while (temp!=NULL)
{
oFile << temp->word << endl;
temp = temp->next;
}
}
bool exists(string target) //I cant think of a single way to search a singly linked list that is faster than O(n)
{
node *temp;
temp = root;
while (temp!=NULL)
{
if (temp->word == target)
return true;
}
return false;
}
//Constructor
LinkedListStorage();
//Destructor
~LinkedListStorage()
{
node *ptr;
for (ptr = root; root;ptr = root)
{
root = root->next;
delete ptr;
}
}
LinkedListStorage(const LinkedListStorage &other) :root(NULL)
{
node *cur = other.root;
node *end = NULL;
while(cur)
{
node* x = new node;
x->word = cur->word;
if(!root)
{
root = x;
end = root;
}
else
{
end->next = x;
end = x;
}
cur = cur->next;
}
}
friend ofstream& operator<<(ofstream& OS,LinkedListStorage& LLS);
friend ifstream& operator>>(ifstream& IS, LinkedListStorage& LLS);
};
ofstream& operator<<(ofstream& OS, LinkedListStorage& LLS)
{
LLS.write(OS);
return OS;
}
ifstream& operator>>(ifstream& IS, LinkedListStorage& LLS)
{
LLS.read(IS);
return IS;
}
and finally ArrayStorage.ccp
#include <fstream>
#include <string>
#include <iostream>
#include <algorithm>
using namespace std;
class ArrayStorage
{
//Variables
private: string* storageArray;
int aSize; // array size
public:
//methods
void read(ifstream& iFile)
{
aSize = 0; //intialise
string line;
if(iFile.is_open())
{
while(std::getline(iFile, line))
++aSize; //Figures out the size for the dynamic array
}
string *pnArray = new string[aSize];//intialise array
for (int i = 0; i < aSize; i++)
{
if(i<3)
{
iFile.ignore();
}
getline(iFile,pnArray[i]); //this should not contain any important data due to the way sorting is done
sort(pnArray,pnArray + i); //sorts the array
}
storageArray = pnArray;
}
void write(ofstream& oFile)
{
if(oFile.is_open())
{
for (int j = 0; j < aSize; j++)
{
oFile << storageArray[j] << endl;
}
}
}
bool exists(string target)
{
int lo = 1;
int hi = aSize - 1;
int mid = 0;
int comparitor = 0;
while(true)
{
mid =(lo+hi+1)/2; // the plus one is to force it to round up to the nearest highest integer
if(mid == hi)
{
if(comparitor = target.compare(storageArray[lo]) == 0)
{
return true;
}
else if(comparitor = target.compare(storageArray[hi]) == 0)
{
return true;
}
else
{
return false;
}
}
comparitor = target.compare(storageArray[mid]);
if(comparitor == 0)
return true;
else if(comparitor > 0)
lo = mid;
else if(comparitor < 0)
hi = mid;
}
}
bool stdExists(string target)
{
int check = count(storageArray,storageArray+(aSize-1),target);
if(check >0)
return true;
else
return false;
}
//copy constructor
ArrayStorage(const ArrayStorage &other)
{
storageArray = new string[other.aSize];
aSize = other.aSize;
memcpy(storageArray,other.storageArray,sizeof(string) * aSize);
}
//constructor
ArrayStorage();
//Destructor
~ArrayStorage()
{
delete [] storageArray;
}
//overload operator
const ArrayStorage &operator=(const ArrayStorage &other)
{
if(this == &other) return *this;
delete[] storageArray;
storageArray = new string[other.aSize];
aSize = other.aSize;
memcpy(storageArray,other.storageArray,sizeof(string) * aSize);
return *this;
//Friends for benefit
}
friend ofstream& operator<<(ofstream& OS, ArrayStorage& SA);
friend ifstream& operator>>(ifstream& IS, ArrayStorage& SA);
};
ofstream& operator<<(ofstream& OS, ArrayStorage& SA)
{
SA.write(OS);
return OS;
}
ifstream& operator>>(ifstream& IS, ArrayStorage& SA)
{
SA.read(IS);
return IS;
}
膨大な量のテキストで申し訳ありません。不要なものがあればお知らせください。削除します。