newbie needs asstance with linker error

[shadowfire36]

i got my code to finally compile but, now im getting 5 linker errors that i have no idea why im throwing them

the errors are:
[code=cpp]
football.obj : error LNK2019: unresolved external symbol "public: void __thiscall Football::SearchMatches(struct Match * * const,int,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,int)" (?SearchMatches@Football@@QAEXQAPAUMatch@@HV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@H@Z) referenced in function "public: void __thiscall Football::RunFootball(void)" (?RunFootball@Football@@QAEXXZ)
football.obj : error LNK2019: unresolved external symbol "public: void __thiscall Football::ReadLastSearchWord(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > &,int &)" (?ReadLastSearchWord@Football@@QAEXAAV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AAH@Z) referenced in function "public: void __thiscall Football::RunFootball(void)" (?RunFootball@Football@@QAEXXZ)
football.obj : error LNK2019: unresolved external symbol "public: void __thiscall Football::SearchMatches(struct Match * * const,int,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?SearchMatches@Football@@QAEXQAPAUMatch@@HV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) referenced in function "public: void __thiscall Football::RunFootball(void)" (?RunFootball@Football@@QAEXXZ)
football.obj : error LNK2019: unresolved external symbol "public: void __thiscall Football::WriteLastSearchWord(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?WriteLastSearchWord@Football@@QAEXV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) referenced in function "public: void __thiscall Football::RunFootball(void)" (?RunFootball@Football@@QAEXXZ)
D:\Documents and Settings\shadowfire36\Desktop\whochamp_do_not _edit\ed2\whos_the champ\Debug\whos_the champ.exe : fatal error LNK1120: 4 unresolved externals
[/code]

here is new code and header

football.h
[code=cpp]
#ifndef FOOTBALL_H
#define FOOTBALL_H


#include <iostream>
#include <fstream>
#include <string>
#include "Message.h"


using namespace std;

// definition of strct that will hold all information of match
struct Match
{
string Season;
string Team1;
string Team2;
string Result;
};



class Football : public Message
{
public:

void WriteLastSearchWord(string word);
void ReadLastSearchWord(string &team, int &record);
void SearchMatches(Match *matches[],int size,string TeamName);
void SearchMatches(Match *matches[],int size,string TeamName, int record);
void RunFootball();
Football(string *footBallData);







protected:

string &footBallSave;
string team;




};

#endif
[/code]

football.cpp
[code=cpp]
#include <iostream>
#include <fstream>
#include <string>
#include "Football.h"
#include "Message.h"


using namespace std;



//Search within array of matches and display the results
void SearchMatches(Match* matches,int size,string TeamName)
{
//declare the result array
Match SearchResult[2000];
//initalize the result counter
int SearchResultCount=0;

int SelectedNumber;

//search within the matches array
for(int i=0;i<size;i++)
{
//check if the entered name is the team1 or team2 in the match
if(matches[i].Team1==TeamName || matches[i].Team2==TeamName)
{
//update the search result counter
SearchResultCount++;
//display the seasons
cout<<endl<<"("<<SearchResultCount<<") "<<matches[i].Season;
//store the matched match in the search result array
SearchResult[SearchResultCount] = matches[i];
}
}
cout << endl;

//check for results
if(SearchResultCount>0)
{
cout << "which year would you like to view results "<<endl;
cin>>SelectedNumber;

SelectedNumber;

ofstream myfile;
myfile.open("nflSave.txt",ios::app);
myfile << endl << SelectedNumber;
myfile.close();

//display the match information
cout<<SearchResult[SelectedNumber].Season<<endl;
cout<<SearchResult[SelectedNumber].Team1<<endl;
cout<<"Over"<<endl;
cout<<SearchResult[SelectedNumber].Team2<<endl;
cout<<SearchResult[SelectedNumber].Result<<endl;
}
else cout<<"No search result";
cout<<endl;
}
void SearchMatches(Match* matches,int size,string TeamName, int record)
{
//declare the result array
Match SearchResult;
//initalize the result counter
int SearchResultCount=0;

//int SelectedNumber;

//search within the matches array
for(int i=0;i<size;i++)
{
//check if the entered name is the team1 or team2 in the match
if(matches[i].Team1==TeamName || matches[i].Team2==TeamName)
{
//update the search result counter
SearchResultCount++;
if (SearchResultCount == record)
{
//store the
//display the seasons
//cout<<endl<<"("<<SearchResultCount<<") "<<matches[i].Season;

//store the matched match in the search result array
SearchResult = matches[i];
break;
}
}
}
cout<<endl;

//check for results
if(SearchResultCount>0)
{
//display the match information
cout<<SearchResult.Season<<endl;
cout<<SearchResult.Team1<<endl;
cout<<"Over"<<endl;
cout<<SearchResult.Team2<<endl;
cout<<SearchResult.Result<<endl;
}
else cout<<"No search result";
cout<<endl;
}

// This function is used for storing the last search keyword entered to the recallteam.txt
void WriteLastSearchWord(string word)
{
ofstream myfile;
myfile.open("nflSave.txt");
myfile << word;
myfile.close();
}

// This function is used for read the last search keyword enter from the recallteam.txt
void ReadLastSearchWord(string &team, int &record)
{
ifstream inFile("nflSave.txt");
getline(inFile, team);
inFile >> record;
inFile.close();
}



void Football::RunFootball()
{

ifstream inFile("nfl.txt");
//initailze the matches ( array of strcuts )
Match *matches[2000];

// create input stream for file


//It will holds the read lines from the file
string Buffer;

// check if the file is exist
if(!inFile.is_open())
{
//display the error message
//cout<<"Failed to open file"<<endl;
cerr << " File is Missing";
}

// initalize the counter
int matchesCounter=0;
while(!inFile.eof())
{ //&Match::operator =(const Match &)
//read season
matches[matchesCounter] = new Match;
getline(inFile,Buffer);
matches[matchesCounter]->Season = Buffer;
//read team1 name
getline(inFile,Buffer);
matches[matchesCounter]->Team1 = Buffer;
//read the "over" string
getline(inFile,Buffer);
//read team2 name
getline(inFile,Buffer);
matches[matchesCounter]->Team2 = Buffer;
//read result
getline(inFile,Buffer);
matches[matchesCounter]->Result = Buffer;
//read the empty line
getline(inFile,Buffer);
//update the matches counter
matchesCounter++;
}


//its used for Main menu selection
char Check='1';

while(Check !='3')
{
//Display the main menu

cin>>Check;

switch(Check)
{
//Search
case '1':
{
string TeamName="";

getline(cin,TeamName);
system("cls");
cout << "Please Enter Team City And Team Name" <<endl;
getline(cin,TeamName);//free's buffer
WriteLastSearchWord(TeamName);
SearchMatches(matches,matchesCounter,TeamName);
break;
}
//Display the last search team
case '2':
{
string team;
int record;
ReadLastSearchWord(team, record);
system("cls");
cout << "Last Recorded Viewed" <<endl;
SearchMatches(matches,matchesCounter ,team , record);

break;
}
//Exit the program
case '3':
{
exit(0);
}
default:continue;

}
}
}
[/code]

[jsmith]

Given that every symbol you reference in football.cpp from main.cpp is undefined, I'd first suspect that you're not linking football.obj into the executable.

Can you post the linker command that is being executed to create the exe?

[DiptenduDas]

U need to make below changes for the methods:

from

void SearchMatches(Match* matches,int size,string TeamName)
{
	//declare the result array
	Match SearchResult[2000];
......
......
}

to

from

void Football::SearchMatches(Match* matches,int size,string TeamName)
{
	//declare the result array
	Match SearchResult[2000];
......
......
}

Do same for other functions of class Football also.