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ShowCase: Tic-Tac-Toe

zachp (3)
Hello everyone!
I just wanted to share my Tic-Tac-Toe plugin I just made.
I'm new to C++, and it's a lot of fun.
If you see some things that need to be improved, go ahead and tell me.
Also, this is fully working! :)

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  // TIC-TAC-TOE - made by: ZVP
#include <iostream>
using namespace std;

int main() {
	char Square1('1');
	char Square2('2');
	char Square3('3');
	char Square4('4');
	char Square5('5');
	char Square6('6');
	char Square7('7');
	char Square8('8');
	char Square9('9');
	int Playerturn(1);
	bool Gameover(true);

	
	do {
		cout<<Square1<<"|"<<Square2<<"|"<<Square3<<endl;
		cout<<"-+-+-"<<endl;
		cout<<Square4<<"|"<<Square5<<"|"<<Square6<<endl;
		cout<<"-+-+-"<<endl;
		cout<<Square7<<"|"<<Square8<<"|"<<Square9<<endl;

		char Playermark;
		if(Playerturn == 1){
			Playermark = 'X';
		} else {
			Playermark = 'O';
		}

		cout<<"It is currently player "<<Playerturn<<"'s turn."<<endl;
		bool Validmove;
		

		do {
		Validmove = true;
		char input;
		cin>>input;

		if(input == '1' && Square1 == '1'){
			Square1 = Playermark;
		} else if(input == '2' && Square2 == '2'){
			Square2 = Playermark;
		} else if(input == '3' && Square3 == '3'){
			Square3 = Playermark;
		} else if(input == '4' && Square4 == '4'){
			Square4 = Playermark;
		} else if(input == '5' && Square5 == '5'){
			Square5 = Playermark;
		} else if(input == '6' && Square6 == '6'){
			Square6 = Playermark;
		} else if(input == '7' && Square7 == '7'){
			Square7 = Playermark;
		} else if(input == '8' && Square8 == '8'){
			Square8 = Playermark;
		} else if(input == '9' && Square9 == '9'){
			Square9 = Playermark;
		} else {
			cout<<"Invalid Entry"<<endl;
			Validmove = false;
		}
		} while(!Validmove);

		Gameover = false;
		bool Wingame = true;

		if(Square1 != '1'){
			if(Square1 == Square2 &&  Square1 == Square3 && Square2 == Square3){
				Gameover = true;
				Wingame = true;
			} else if(Square1 == Square4 && Square1 == Square7 && Square4 == Square7){
				Gameover = true;
				Wingame = true;
			}
		} if (Square9 != '9'){
			if(Square9 == Square3 && Square6 == Square9 && Square3 == Square6){
				Gameover = true;
				Wingame = true;
			} if(Square9 == Square8 && Square9 == Square7 && Square8 == Square7){
				Gameover = true;
				Wingame = true;
			}
		} if (Square5 != '5'){
			if(Square5 == Square1 && Square5 == Square9 && Square9 == Square1){
				Gameover = true;
				Wingame = true;
			} else if(Square5 == Square3 && Square5 == Square7 && Square7 == Square3){
				Gameover = true;
				Wingame = true;
			} else if(Square5 == Square4 && Square5 == Square6 && Square6 == Square4){
				Gameover = true;
				Wingame = true;
			} else if(Square5 == Square2 && Square5 == Square8 && Square8 == Square2){
				Gameover = true;
				Wingame = true;
			}
		}
		if(Square1 != '1' && Square2 != '2' && Square3 != '3' && Square4 != '4' &&  Square5 != '5'
			&& Square6 != '6' && Square7 != '7' && Square8 != '8' && Square9 != '9' && !Gameover){
				Gameover = true;
				Wingame = false;
		}

		
		if(Gameover){
			if(Wingame){
				cout<<"Player: "<<Playerturn<<" has won!"<<endl;
				
			}
			cout<<Square1<<"|"<<Square2<<"|"<<Square3<<endl;
			cout<<"-+-+-"<<endl;
			cout<<Square4<<"|"<<Square5<<"|"<<Square6<<endl;
			cout<<"-+-+-"<<endl;
			cout<<Square7<<"|"<<Square8<<"|"<<Square9<<endl;

			char yn;
			cout<<"Play again y/n?"<<endl;
			cin>>yn;
			if(yn = 'y'){
				Gameover = false;
				Square1 = '1';
				Square2 = '2';
				Square3 = '3';
				Square4 = '4';
				Square5 = '5';
				Square6 = '6';
				Square7 = '7';
				Square8 = '8';
				Square9 = '9';
			} 
			Playerturn = 1;
		} else {
			if(Playerturn == 1){
				Playerturn = 2;
			} else {
				Playerturn = 1;
			}
		 }
			

		
	} while(!Gameover);
}
backslashx00 (40)
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