Tic tac toe C++ difficulty levels..........

#include <iostream>
#include <cstdlib>
#include <ctime>

using namespace std;

class tictactoe
{
	private:
		
		char table[9],eis,tf;
		int ne;
		
	public:
		void menu();
		void cr(int);
		void setempty(char);
		void control(int,char);
		void seteis(char);
		void nexteis();
		char gettable(int);
		int gettf();
		int whowin();
		char geteis();
		int rules();
		int pcmove();
		int getpcor1();
		void setpcor1(int);
		void turnpcor1();
};

/*menu*/
void tictactoe::menu()
{
	system("cls");
	cout<<"1 -> 1vs1 \n";
	cout<<"2 -> 1vsPc \n";
	cout<<"3 -> Rules and regulatios \n";
}
/*emfanizei ton pinaka*/
void tictactoe::cr(int ch){
	system("cls");
	cout<<"|\t" << gettable(0) << "\t|\t" << gettable(1) << "\t|\t" << gettable(2) << "\t|\t"<<endl;
    cout<< "-------------------------------------------------"<<endl;
    cout<<"|\t" << gettable(3) << "\t|\t" << gettable(4) << "\t|\t" << gettable(5) << "\t|\t"<<endl; 
    cout<< "-------------------------------------------------"<<endl;
    cout<<"|\t" << gettable(6) << "\t|\t" << gettable(7) << "\t|\t" << gettable(8) << "\t|\t"<<endl;
	
	
	if(eis=='x' && whowin()!=0 && ch==1)
		cout<<"Play X\n\n";
	if(eis=='o' && whowin()!=0 && ch==1)
		cout<<"Play O\n\n";
}
void tictactoe::setempty(char vacancy)
{
	int i;
	for(i=0;i<=9;i++){
			table[i]=vacancy;
	}
}
/*orizei to arxiko sumvolo*/
void tictactoe::seteis(char t)
{
	eis=t;
}
/*allazei to sumvolo*/
void tictactoe::nexteis()
{
	
	if(eis=='x')
		seteis('o');
	else
		seteis('x');
	
}
/*eisagei ta sumvola*/
void tictactoe::control(int mv,char vacancy)
{
	tf=0;
	if(mv==1)
	{
		if(table[0]==vacancy)
		{
			if(eis=='x')
			{
				table[0]='x';
				tf=1;
			}
			if(eis=='o')
			{
				table[0]='o';
				tf=1;
			}
		}
	}
	if(mv==2)
	{
		if(table[1]==vacancy)
		{
			if(eis=='x')
			{
				table[1]='x';
				tf=1;
			}
			if(eis=='o')
			{
				table[1]='o';
				tf=1;
			}
		}
	}
	if(mv==3)
	{
		if(table[2]==vacancy)
		{
			if(eis=='x')
			{
				table[2]='x';
				tf=1;
			}
			if(eis=='o')
			{
				table[2]='o';
				tf=1;
			}
		}
	}
	if(mv==4)
	{
		if(table[3]==vacancy)
		{
			if(eis=='x')
			{
				table[3]='x';
				tf=1;
			}
			if(eis=='o')
			{
				table[3]='o';
				tf=1;
			}
		}
	}
	if(mv==5)
	{
		if(table[4]==vacancy)
		{
			if(eis=='x')
			{
				table[4]='x';
				tf=1;
			}
			if(eis=='o')
			{
				table[4]='o';
				tf=1;
			}
		}
	}
	if(mv==6)
	{
		if(table[5]==vacancy)
		{
			if(eis=='x')
			{
				table[5]='x';
				tf=1;
			}
			if(eis=='o')
			{
				table[5]='o';
				tf=1;
			}
		}
	}
	if(mv==7)
	{
		if(table[6]==vacancy)
		{
			if(eis=='x')
			{
				table[6]='x';
				tf=1;
			}
			if(eis=='o')
			{
				table[6]='o';
				tf=1;
			}
		}
	}
	if(mv==8)
	{
		if(table[7]==vacancy)
		{
			if(eis=='x'){
				table[7]='x';
				tf=1;
			}
			if(eis=='o')
			{
				table[7]='o';
				tf=1;
			}
		}
	}
	if(mv==9)
	{
		if(table[8]==vacancy)
		{
			if(eis=='x')
			{
				table[8]='x';
				tf=1;
			}
			if(eis=='o')
			{
				table[8]='o';
				tf=1;
			}
		}
	}	
}
/*mas emfanizei ti exei o pinakas*/
char tictactoe::gettable(int tr)
{
	return table[tr];
}
/*ean mporei na eisagei sumvolo*/
int tictactoe::gettf()
{
	return tf;
}
/*mas deixnei ean kapoios kerdise*/
int tictactoe::whowin()
{
	
	/*orizontia*/
	if((table[0]=='x' && table[1]=='x' && table[2]=='x') || (table[0]=='o' && table[1]=='o' && table[2]=='o') )
	{
		return 0;
	}
	if((table[3]=='x' && table[4]=='x' && table[5]=='x') || (table[3]=='o' && table[4]=='o' && table[5]=='o') )
	{
		return 0;
	}
	if((table[6]=='x' && table[7]=='x' && table[8]=='x') || (table[6]=='o' && table[7]=='o' && table[8]=='o') )
	{
		return 0;
	}
	
	/*katheta*/
	if((table[0]=='x' && table[3]=='x' && table[6]=='x') || (table[0]=='o' && table[3]=='o' && table[6]=='o') )
	{
		return 0;
	}
	if((table[1]=='x' && table[4]=='x' && table[7]=='x') || (table[1]=='o' && table[4]=='o' && table[7]=='o') )
	{
		return 0;
	}
	if((table[2]=='x' && table[5]=='x' && table[8]=='x') || (table[2]=='o' && table[5]=='o' && table[8]=='o') )
	{
		return 0;
	}
	
	/*diagwnia*/
	if((table[0]=='x' && table[4]=='x' && table[8]=='x') || (table[0]=='o' && table[4]=='o' && table[8]=='o') )
	{
		return 0;
	}
	if((table[2]=='x' && table[4]=='x' && table[6]=='x') || (table[2]=='o' && table[4]=='o' && table[6]=='o') )
	{
		return 0;
	}
}
/*gurizei to sumvolo*/
char tictactoe::geteis()
{
	return eis;
}
/*kanones*/
int tictactoe::rules()
{
	int p;
system("cls");
cout
<<"You can play 1vs1 or 1vsPc\n"
<<"Every box symbolizes a number\n"
<<"The first position is  1 and the last one is 9 \n\n";
cout<<"Give 1 to return in menu \n";
cout<<"Give 0 to exit \n";
cin>>p;
while(p>1 || p<0)
{
		cout
		<< "Not a Valid Choice\n"
		<< "Choose again:\n";
		cout<<"Give 1 to return in menu\n";
		cout<<"Give 0 exit\n";
		cin>>p;
		}
		return p;			  
}
int tictactoe::pcmove()
{
	int random;
	srand (time(NULL));
	random=(rand() % 9)+1;

	return random;
}
/*deixnei pios pezei*/
int tictactoe::getpcor1()
{
	return ne;
}
/*poios 3ekinaei*/
void tictactoe::setpcor1(int lol)
{
	ne=lol;
}
/*poios pezh*/
void tictactoe::turnpcor1()
{
	if(ne==1)
		ne=2;
	else
		ne=1;
}

int main()
	{
		
	int ch1,mv,cm=0,rewin=1,ot=0;;
	char vancancy=' ';
	tictactoe t; 
	do{
	ot=0;
	t.menu(); 
	
	
	cout<<"Give a choice: ";
	cin>>ch1;
	if(ch1!=0){
	while(ch1<1 || ch1>3){
		cout<<"Give right choice: ";
		cin>>ch1;
		if(ch1==0)
			break;
	}
	}
	/*gia thn prwth epilogh*/
	if(ch1==1){
		t.setempty(vancancy);	
		t.seteis('x');
		t.cr(ch1);
		do{
		do{
		cout<<"Give again choice: ";
		cin>>mv;
		if(mv==0)
			break;
		t.control(mv,vancancy);
		if(t.gettf()==0 && (mv>0 && mv<10)){
			cout<<"Give again the right choice\n";
		}
		}while(t.gettf()==0 && (mv>0 || mv<10 ));
		if(mv==0){
			cout<<"Arrivederci";
			break;
		}
		t.nexteis();
		t.cr(ch1);
		rewin=t.whowin();
		cm=cm+1;
	}while(cm<9 && rewin!=0);
		if(rewin==0){
			t.nexteis();
			cout<<"And the winner is: "<<t.geteis();
		}
		if(cm==9 && rewin!=0){
			cout<<"Draw";
		}

	}
	

	
	/*Gia thn 2h epilogh*/
	if(ch1==2){
		t.setpcor1(1);
		t.setempty(vancancy);
		t.seteis('x');
		t.cr(ch1);
		do{
		if(t.getpcor1()==1 && rewin!=0){
		do{
		cout<<"Give again choice: ";
		cin>>mv;
		if(mv==0)
			break;
		t.control(mv,vancancy);
		if(t.gettf()==0 && (mv>0 && mv<10)){
			cout<<"Give again the right choice\n";
		}
		}while(t.gettf()==0 && (mv>0 || mv<10 ));
		if(mv==0){
			cout<<"Arrivederci dal pc";
			break;
		}
		t.nexteis();
		t.cr(ch1);
		rewin=t.whowin();
		cm=cm+1;
		if(cm<9)
		t.turnpcor1();
		}
		
		if(t.getpcor1()==2 && rewin!=0){
		do{
		mv=t.pcmove();
		t.control(mv,vancancy);
		}while(t.gettf()==0);
		t.nexteis();
		t.cr(ch1);
		rewin=t.whowin();
		cm=cm+1;
		if(cm<9)
		t.turnpcor1();
		}
		}while(cm<9 && rewin!=0);
		
		if(rewin==0){
			t.nexteis();
			cout<<"And the winner is: "<<t.geteis();
		}
		if(cm==9 && rewin!=0){
			cout<<"Draw";
		}

	}
	/*gia thn 3h epilogh*/
	if(ch1==3)
	{
		ot=t.rules();
	}
	}while(ot!=0);
	return 0;
}