compile errors in linux

pntball650 (4)
I wrote this program in visual C++ but it has to be able to compile in linux.... Im getting many errors and im not sure what they mean or how to fix them....any help would be greatly appreciated 
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#include <string>
#include <iostream>
#include <fstream>
#include <vector>
#include <ctime>
#include <sstream>

using namespace std;

class Character
{
public:
	Character(void);
	int getIntelligence();
	void setLoseIntelligence();
	void setGainIntelligence();
	void setRandomIntelligence();
	int getTime();
	void setTime();
	double getMoney();
	void setPlusMoney();
	void setMinusMoney();
	void setRandomMoney();
	int getLocation();
	void setLocation();
	void outputCharacter();
	void setRandomTime();
	int getScore();
	int Score();
	bool checkAttributes();
	


private:
	int intelligence;
	int time;
	int location;
	double money;
	int score;
	
	
};




the errors i am getting are

jwh0003_1.cpp: In member function 'void System::moveForward()':
jwh0003_1.cpp:158: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void System::quit()':
jwh0003_1.cpp:219: error: 'exit' was not declared in this scope
jwh0003_1.cpp: In function 'int main()':
jwh0003_1.cpp:224: error: 'srand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Menu::output()':
jwh0003_1.cpp:298: error: 'system' was not declared in this scope
jwh0003_1.cpp:309: error: 'exit' was not declared in this scope
jwh0003_1.cpp: In constructor 'Character::Character()':
jwh0003_1.cpp:319: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Character::setRandomIntelligence()':
jwh0003_1.cpp:343: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Character::setRandomTime()':
jwh0003_1.cpp:358: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Character::setRandomMoney()':
jwh0003_1.cpp:378: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'bool Character::checkAttributes()':
jwh0003_1.cpp:412: error: 'system' was not declared in this scope
jwh0003_1.cpp:418: error: 'system' was not declared in this scope
jwh0003_1.cpp:424: error: 'system' was not declared in this scope
jwh0003_1.cpp:430: error: 'system' was not declared in this scope
jwh0003_1.cpp: In member function 'void Encounter::puzzles()':
jwh0003_1.cpp:450: error: 'rand' was not declared in this scope
jwh0003@tux196:~$ jwh0003@tux196:~$ g++ jwh0003_1.cpp -o game
jwh0003_1.cpp: In member function 'void System::moveForward()':
jwh0003_1.cpp:158: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void System::quit()':
jwh0003_1.cpp:219: error: 'exit' was not declared in this scope
jwh0003_1.cpp: In function 'int main()':
jwh0003_1.cpp:224: error: 'srand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Menu::output()':
jwh0003_1.cpp:298: error: 'system' was not declared in this scope
jwh0003_1.cpp:309: error: 'exit' was not declared in this scope
jwh0003_1.cpp: In constructor 'Character::Character()':
jwh0003_1.cpp:319: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Character::setRandomIntelligence()':
jwh0003_1.cpp:343: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Character::setRandomTime()':
jwh0003_1.cpp:358: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Character::setRandomMoney()':
jwh0003_1.cpp:378: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'bool Character::checkAttributes()':
jwh0003_1.cpp:412: error: 'system' was not declared in this scope
jwh0003_1.cpp:418: error: 'system' was not declared in this scope
jwh0003_1.cpp:424: error: 'system' was not declared in this scope
jwh0003_1.cpp:430: error: 'system' was not declared in this scope
jwh0003_1.cpp: In member function 'void Encounter::puzzles()':
jwh0003_1.cpp:450: error: 'rand' was not declared in this scope
-bash: jwh0003@tux196:~$: command not found
jwh0003@tux196:~$ jwh0003_1.cpp: In member function 'void System::moveForward()':
-bash: jwh0003_1.cpp:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:158: error: 'rand' was not declared in this scope
-bash: jwh0003_1.cpp:158:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp: In member function 'void System::quit()':
-bash: jwh0003_1.cpp:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:219: error: 'exit' was not declared in this scope
-bash: jwh0003_1.cpp:219:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp: In function 'int main()':
-bash: jwh0003_1.cpp:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:224: error: 'srand' was not declared in this scope
-bash: jwh0003_1.cpp:224:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp: In member function 'void Menu::output()':
-bash: jwh0003_1.cpp:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:298: error: 'system' was not declared in this scope
-bash: jwh0003_1.cpp:298:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:309: error: 'exit' was not declared in this scope
-bash: jwh0003_1.cpp:309:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp: In constructor 'Character::Character()':
-bash: jwh0003_1.cpp:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:319: error: 'rand' was not declared in this scope
-bash: jwh0003_1.cpp:319:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp: In member function 'void Character::setRandomIntelligence()':
-bash: jwh0003_1.cpp:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:343: error: 'rand' was not declared in this scope
-bash: jwh0003_1.cpp:343:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp: In member function 'void Character::setRandomTime()':
-bash: jwh0003_1.cpp:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:358: error: 'rand' was not declared in this scope
-bash: jwh0003_1.cpp:358:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp: In member function 'void Character::setRandomMoney()':
-bash: jwh0003_1.cpp:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:378: error: 'rand' was not declared in this scope
-bash: jwh0003_1.cpp:378:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp: In member function 'bool Character::checkAttributes()':
-bash: jwh0003_1.cpp:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:412: error: 'system' was not declared in this scope
-bash: jwh0003_1.cpp:412:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:418: error: 'system' was not declared in this scope
-bash: jwh0003_1.cpp:418:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:424: error: 'system' was not declared in this scope
-bash: jwh0003_1.cpp:424:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:430: error: 'system' was not declared in this scope
-bash: jwh0003_1.cpp:430:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp: In member function 'void Encounter::puzzles()':
-bash: jwh0003_1.cpp:: command not found
jwh0003@tux196:~$ jwh0003_1.cpp:450: error: 'rand' was not declared in this scope
-bash: jwh0003_1.cpp:450:: command not found
jwh0003@tux196:~$ clear
jwh0003@tux196:~$ g++ jwh0003_1.cpp -o game jwh0003_1.cpp: In member function 'void System::moveForward()':
jwh0003_1.cpp:158: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void System::quit()':
jwh0003_1.cpp:219: error: 'exit' was not declared in this scope
jwh0003_1.cpp: In function 'int main()':
jwh0003_1.cpp:224: error: 'srand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Menu::output()':
jwh0003_1.cpp:298: error: 'system' was not declared in this scope
jwh0003_1.cpp:309: error: 'exit' was not declared in this scope
jwh0003_1.cpp: In constructor 'Character::Character()':
jwh0003_1.cpp:319: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Character::setRandomIntelligence()':
jwh0003_1.cpp:343: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Character::setRandomTime()':
jwh0003_1.cpp:358: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'void Character::setRandomMoney()':
jwh0003_1.cpp:378: error: 'rand' was not declared in this scope
jwh0003_1.cpp: In member function 'bool Character::checkAttributes()':
jwh0003_1.cpp:412: error: 'system' was not declared in this scope
jwh0003_1.cpp:418: error: 'system' was not declared in this scope
jwh0003_1.cpp:424: error: 'system' was not declared in this scope
jwh0003_1.cpp:430: error: 'system' was not declared in this scope
jwh0003_1.cpp: In member function 'void Encounter::puzzles()':
jwh0003_1.cpp:450: error: 'rand' was not declared in this scope
pntball650 (4)
the code is too long so its in segments.....

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class System
{
public:
	void gameMenu(string username);
	void moveForward();
	void readPapers();
	void looseChange();
	void viewChar();
	void quit();
	void Scores();
	

private:
	Character character;

	
};

class Menu
{
      public:
             string choice;
             void output();      
      };

class Encounter
{
public:
	void nothingHappens();
	void puzzles();
	void encounterProfessor();
	void encounterStudent();
	void attacked();
	void gradePapers();
	Encounter(Character* charac);

private:
	Character *character;
	

};

class HighScores
{
public:
	void readScores();
	void writeScores();
	void scoresOut();
	//here
	int addScore(string username, int highScore);
	//here
	void inputScore(string username, int highScore);
	vector < pair < string, int > > v;
};

void System::gameMenu(string username)
{
	
	viewChar();
	
	string menuChoice;
	while (menuChoice != "5")
	{
		
	cout << "\n1) Move forward (takes time, could be risky...) " << endl;
	cout << "2) Read technical papers (boost intelligence, takes time) " << endl;
	cout << "3) Search for loose change (boost money, takes time) " << endl;
	cout << "4) View Character " << endl;
	cout << "5) Quit the game " << endl;
	cout << "Please choose an action: ";
	
	cin >> menuChoice;
	

	if(menuChoice == "1")
	{		
	moveForward();
	}

	else if(menuChoice == "2")
	{
	readPapers();
	}

	else if(menuChoice == "3")
	{
		looseChange();
	}

	else if(menuChoice == "4")
	{
		viewChar();
	}

	else if(menuChoice == "5")
	{
		quit();
	}

	if (character.checkAttributes() == true)
	{
		HighScores scorez;
		scorez.addScore(username, character.getScore());
			return;
	}
}
}

//idea on how to do percentages from someone on Yahoo Answers http://answers.yahoo.com/question/index?qid=20090924083620AADsumy
void System::moveForward()
{
	character.setLocation();
	Encounter encounter(&character);
	cout << "\nYou chose to move forward and ";
	int random = (rand()%100);

	if (random <= 30)
	{
	cout << "nothing happened!" << endl;
	encounter.nothingHappens();
	character.setTime();
	}

	else if(random <= 55)
	{
		cout << "you encountered a puzzle!" << endl;
		encounter.puzzles();
		character.setTime();
	}

	else if(random <= 70)
	{
		cout << "you were attacked!" << endl;
		encounter.attacked();
	}

	else if(random <= 80)
	{
		cout << "you encountered a professor." << endl;
		encounter.encounterProfessor();
	}

	else if(random <= 90)
	{
		cout << "you encountered another student." << endl;
		encounter.encounterStudent();
	}

	else if(random <= 100)
	{
		cout <<"you are forced to grade papers." << endl;
		encounter.gradePapers();
	}
}

	void System::readPapers()
	{
	character.setTime();
	character.setRandomIntelligence();
	}

	void System::looseChange()
	{
		character.setTime();
		character.setRandomMoney();

	}

	void System::viewChar()
	{
	character.outputCharacter();
	}

	void System::quit()
	{
	exit(1);
	}

int main()
{
	srand((unsigned)time(0));
    cout <<"What's your username? ";
    string username;
//Found getline() at http://www.cppreference.com/wiki/string/start
	getline(cin, username);
cout << "===========================================================" << endl;
    cout << "|                  Welcome, " << username << "!                        |" << endl;
    cout << "===========================================================" << endl;
    cout << "" << endl;
    
	Menu userChoice;
	userChoice.output();
       
	
}

void Menu::output()
{
	string username = "";
	while(choice != "3"){
	
    cout << "1) Start a New Game of Dunstan and Dragons!" << endl;
    cout << "2) View top 10 High Scores" << endl;
    cout << "3) Quit Game and Get a Life" << endl;
    cout << "Please choose an option: ";
    cin  >> choice;
     
	
           if(choice == "1")
		   {
				System menu;
				menu.gameMenu(username);
				system("PAUSE");
		   }

		   else if(choice == "2"){
               HighScores highScore;
			   cout << "\n Top 10 High Scores " << endl;
			   highScore.scoresOut();
			   cout <<""<<endl;
		   }
		   else if(choice == "3")
		   {
			   exit(1);
		   }   

		 
	}	
}
pntball650 (4) 
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Character::Character()
{	
	//Got help on the random number generator from http://www.daniweb.com/forums/thread1769.html# 
    	intelligence = (rand()%18)+8;
        time = (rand()%18)+8;     
        money =((rand()%1800)+(double)800)/(double)100; 
		location = 20;
}

int Character::getIntelligence()
{
	return intelligence;
}

void Character::setLoseIntelligence()
{
	intelligence = intelligence - 3;

}

void Character::setGainIntelligence()
{
intelligence = intelligence + 2;
}

void Character::setRandomIntelligence()
{
intelligence = (intelligence + (rand()%5)+1);
}

int Character::getTime()
{
return time;
}

void Character::setTime()
{
time = time + 10;
}

void Character :: setRandomTime()
{
time = (time - ((rand()%5)+1));
}

double Character :: getMoney()
{
return money;
}

void Character :: setPlusMoney()
{
	money = money + 10.00;
}

void Character :: setMinusMoney()
{
money = money - 20.00;
}

void Character :: setRandomMoney()
{
	money = (money + (rand()%5)+1);
}

int Character::getLocation()
{
	return location;
}

void Character::setLocation()
{
    location = (location - 1);
}

int Character::getScore()
{
return score;
}

void Character::outputCharacter()
{
	cout << "\nYou have: " << endl;
	cout << "Intelligence: " << intelligence << endl;
	cout << "Time: " << time << endl;
	cout << "Money: $" << money << endl;
	cout << "Your location is: " << getLocation() << endl;
}

bool Character::checkAttributes()
	{ 

	score = intelligence*time*money;
		if (getMoney() <= 0)
		{
			cout<<"\nYou ran out of money and cannot afford to eat so you died. GAME OVER."<<endl;
			system("PAUSE");
		return true;
		}
	 if (getIntelligence() <= 0)
	 {
			cout<<"\nYou lost all intelligence and are now in a vegetative state and unable to continue. GAME OVER."<<endl;
			system("PAUSE");
			return true;
	 }
		if (getTime() <= 0)
		{
			cout<<"\nYou ran out of sick days at work and cannot continue your dungeon adventure. GAME OVER."<<endl;
			system("PAUSE");
			return true;
		}
		if (getLocation() <= 0)
		{			
			cout<<"\nYOU WON THE GAME!"<<endl;
			system("PAUSE");
			return true;
		}
			
			
	}

Encounter::Encounter(Character* charac)
{
character = charac;
}

void Encounter::nothingHappens()
{
	
}

void Encounter::puzzles()
{
	
	int puzzSelect = (rand()%5)+1;
	cout << "Puzzle Time! ... Please read the question and enter your answer (Please provide all text answers in lowercase)." << endl;

 if(puzzSelect == 1)
 {
	 string userAnswer1;
	 string answer1 = "21"; 
	 cout << "What is 7 X 3?: ";
		cin >> userAnswer1;

		if(userAnswer1 == answer1)
		{
			character->setPlusMoney();
			cout<< "Congradulations you recieved +$10.00 money" << endl;
		}
		else
		{
			character->setMinusMoney();
			cout << "That is a completly preposterous answer.....its WRONG....you lose $20.00 money" << endl;
		}
}

 else if(puzzSelect == 2)
{
	 string userAnswer2;
	 string answer2 = "washington"; 
	 cout << "What is the last username of the first president of the United States?: ";
		cin >> userAnswer2;

		if(userAnswer2 == answer2)
		{
			character->setPlusMoney();
			cout<< "Congradulations you recieved +$10.00 money" << endl;
		}
		else
		{
			character->setMinusMoney();
			cout << "That is a completly preposterous answer.....its WRONG....you lose $20.00 money" << endl;
		}
}

 else if(puzzSelect == 3)
{
	 string userAnswer3;
	 string answer3 = "fruit"; 
	 cout << "Is a tomato a fruit or a vegetable?: ";
		cin >> userAnswer3;

		if(userAnswer3 == answer3)
		{
			character->setPlusMoney();
			cout<< "Congradulations you recieved +$10.00 money" << endl;
		}
		else
		{
			character->setMinusMoney();
			cout << "That is a completly preposterous answer.....its WRONG....you lose $20.00 money" << endl;
		}
}

 else if(puzzSelect == 4)
{
	 string userAnswer4;
	 string answer4 = "tiger"; 
	 cout << "What type of animal is Auburn's mascot Aubie?: ";
		cin >> userAnswer4;

		if(userAnswer4 == answer4)
		{
			character->setPlusMoney();
			cout<< "Congradulations you recieved +$10.00 money" << endl;
		}
		else
		{
			character->setMinusMoney();
			cout << "That is a completly preposterous answer.....its WRONG....you lose $20.00 money" << endl;
		}
}

 else if(puzzSelect == 5)
{
	 string userAnswer5;
	 string answer5 = "36"; 
	 cout << "What is the number 6 squared(6^2)?: ";
		cin >> userAnswer5;

		if(userAnswer5 == answer5)
		{
			character->setPlusMoney();
			cout<< "Congradulations you recieved +$10.00 money" << endl;
		}
		else
		{
			character->setMinusMoney();
			cout << "That is a completly preposterous answer.....its WRONG....you lose $20.00 money" << endl;
		}
}


}

void Encounter::encounterProfessor()
{
	cout << "You lose a random amount of time but gain 2 units of intelligence" << endl; 
	
	character->setGainIntelligence();
	character->setRandomTime();
	
}

void Encounter::encounterStudent()
{
	cout << "Because you stayed and talked you lose time." << endl; 
	
	character->setRandomTime();
}

void Encounter::attacked()
{
	cout << "OH NO! The crazed drug addict who attacked you made you dumber and wasted your time. You lose time and intelligence." << endl;
	character->setRandomTime();
	character->setLoseIntelligence();
}

void Encounter::gradePapers()
{
	cout << "But, on the bright side, you get +$10.00." << endl;
	
	character->setPlusMoney();
	character->setRandomTime();
}

void HighScores::readScores()
{
	ifstream file("HighScores.txt");
	int score = 0;
	v.clear();
	string nameString, scoreString;

	if ( file.is_open() )
	{
		while (getline( file, nameString) && getline( file, scoreString))
		{
			stringstream sStream;
			sStream << scoreString;
			sStream >> score;
			inputScore( nameString, score);
		}
	}
	file.close();

    return;
}

void HighScores::writeScores()
{
	ofstream file("HighScores.txt");

	for ( int i=0; i<v.size(); i++)
	{
		file << v[i].first << endl;
		file << v[i].second << endl;
	}

	file.close();
}

void HighScores::scoresOut()
{
	readScores();

	for( int i = 0; i < v.size(); i++ )
	{
		cout << v.at(i).first << " " << v.at(i).second << endl;
	}
}



int HighScores::addScore( string username, int highScore )
{
	readScores();
	
	inputScore(username, highScore);

	writeScores();
	return 0;
}

void HighScores::inputScore(string username, int highScore)
{
	bool insertScore = false;

	// Insert score into list
	for (int i=0; i<v.size(); i++)
	{
		if ( highScore > v.at(i).second )
		{
			insertScore = true;
			v.insert( v.begin() + i, make_pair(username, highScore) );
			break;
		}
	}

	if (v.size() > 0 && insertScore == false)
	{
		v.push_back( make_pair(username, highScore));
	}

	if (v.size() > 10)
	{
		v.erase( v.end()-1 );
	}

	if (v.size() == 0)
	{
		v.push_back( make_pair( username, highScore ) );
	}
}
Duoas (6335)
Ah, the joys of porting from MSC++...

You need to #include <cstdlib>

Also, you should be getting some warnings about comparing signed and unsigned values. (For example, line 293 of your last post.)
Fix it portably with something like:
for ( unsigned i=0; i<(unsigned)v.size(); i++)

Hope this helps.
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