CHESSGAM.CPP

#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <iostream.h>
#include <conio.h>
#include <ctype.h>
#include <dos.h>

int board[8][8],turn=0,count1=0,count2=0;
int gameover();
char strFileName[15];
void printboard();
void wrongStart();
void initialize();
void cleartext();
void check();


int pawn(int x,int y,int x1,int y1);
int horse(int x,int y,int x1,int y1);
int rook(int x,int y,int x1,int y1);
int bishop(int x,int y,int x1,int y1);
int queen(int x,int y,int x1,int y1);
int king(int x,int y,int x1,int y1);

void main()
{

	int gdriver = DETECT;
	int gmode;
	initgraph(&gdriver,&gmode,"e:\\borlandc\\bgi");


	for(float i=0; i<=6;i=i+0.1)
	{
		setcolor(12);
		settextstyle(4,HORIZ_DIR,i);
		outtextxy(50,120,"WELCOME TO THE CHESS");
		delay(30);
		cleardevice();
	}
	outtextxy(50,120,"WELCOME TO THE CHESS");
	settextstyle(1,HORIZ_DIR,3);
	getch();
	cleardevice();


	setcolor(CYAN);
	outtextxy(50,220,"Designed by:");
	setcolor(6);
	outtextxy(50,250,"keshav bhala");


	outtextxy(350,250,"L1F01BSCS0144");
	getch();
	cleardevice();
	cleardevice();

	settextstyle(1,HORIZ_DIR,2);
	setcolor(12);
	outtextxy(50,10,"During the game Press:\n");
	outtextxy(50,10,"______________________\n");


	setcolor(6);
	settextstyle(1,HORIZ_DIR,1.5);
	outtextxy(50,60,"F2 to save file\n");
	outtextxy(50,80,"F3 to load file\n");
	outtextxy(50,100,"ESC to exit game\n");
	outtextxy(50,120,"U to undo selection\n");
	outtextxy(50,200,"\nPress any key to play ");
	getch();
	cleardevice();


	cleartext();
	initialize();
	char ch;
	int x=-1,y=-1,x1=-1,y1=-1;
	setcolor(9);
	outtextxy(10,400,"Player 1");
	for(;;)
	{
	       int game;
		 game=gameover();
		   if(game==0)
		   {
			 break;
		   }
			FILE *fp;
			ch=getch();
			if(ch==0){
			 ch=getch();
			if(ch=='<'){




			  for(;;)
			  {

cout<<"\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\
\b\b\bEnter File name to save \n";
				cin>>strFileName;
				fp=fopen(strFileName,"r+");
				if(fp!=NULL)
				{
					cout<<"File already exist\n";
				}
				else
				{
					   fp=fopen(strFileName,"w+");
					   if(fp==NULL)
					   {
					   cout<<"Invalid File Name\n";
					   }
					   else
						break;
				}
			  }
				fprintf(fp,"%d\n",turn);
				for(int i=0;i<8;i++)
				{
			for(int j=0;j<8;j++)
					  {
					fprintf(fp,"%d\n",board[i][j]);
					  }
				}
				fclose(fp);
				cleartext();
				x=-1;
					y=-1;
					x1=-1;
					y1=-1;
					continue;
				}

			if(ch=='=')
			{



				for(;;)
				{

cout<<"\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\
\b\b\b\b\bEnter File name to Load \n";
				  cin>>strFileName;
				  fp=fopen(strFileName,"r+");
				   if(fp==NULL)
				   {
					 cout<<"File does not exist\n";
				   }
				   else
				   {
					break;
				   }
				}
				 fscanf(fp,"%d",&turn);
				   for(int i=0;i<8;i++){
				     for(int j=0;j<8;j++){
				     fscanf(fp,"%d",&board[i][j]);
						}
					}
				fclose(fp);
				printboard();
				cleartext();
					x=-1;
					y=-1;
					x1=-1;
					y1=-1;
				setcolor(0);
				outtextxy(10,400,"Player Û");
				if(turn!=0){
					check();
					setcolor(2);
					outtextxy(10,400,"Player 2");
					}
				else{
					check();
					setcolor(9);
					outtextxy(10,400,"Player 1");
					}
				  continue;
				  }
			}

		if(ch==27){
			break;
			}
		else if(ch=='u'||ch=='U'){
		x=-1;
		x1=-1;
		y1=-1;
		y=-1;
		cleartext();
		continue;
		}
		if(x==-1){
			ch=toupper(ch);
			if(ch>=65 && ch<=72){
				cout<<ch;
				x=ch-65;
				}
			}
		else if(y==-1)
		{
			if(ch>='1' && ch<='8')
			{
				cout<<ch;
				y=ch-'1';
				if(board[y][x]==0){
					wrongStart();
					x=-1;
					y=-1;
					}
				else
				{
					if(turn==0)
					{
						if(board[y][x]<0)

						{
							wrongStart();
							x=-1;
							y=-1;
						}
					}
					else if(turn!=0)
					{
						if(board[y][x]>0)
						{
							wrongStart();
							x=-1;
							y=-1;
						}
					}
				}
			}
			if(x!=-1 && y!=-1)
				cout<<"\nenter final position  ¯ ";
		}
		else if(x1==-1)
		{

			ch=toupper(ch);
			if(ch>=65 && ch<=72)
			{
				cout<<ch;
				x1=ch-65;
			}
		}
		else if(y1==-1)
		{
			if(ch>='1' && ch<='8')
			{
				cout<<ch;
				y1=ch-'1';
			}
		int b=0,killed=0;



     if(abs(board[y][x])>=9 &&
abs(board[y][x])<=16){
				b = pawn(x,y,x1,y1);
				}



		      else if(abs(board[y][x])==2 ||
abs(board[y][x])==7){	   //if piece selscted has value 2 and 7
				b = horse(x,y,x1,y1);
				}//end horse

////queen///

		      else if(abs(board[y][x])==4){	////if piece selected has value 4
				b = queen(x,y,x1,y1);
				}//end queen
///king///

		      else if(abs(board[y][x])==5){	//if piece selected has value 5
				b = king(x,y,x1,y1);
			 }//end king

///rook///

		      else if(abs(board[y][x])==1 ||
abs(board[y][x])==8){	   //if piece selected has value 1 and 8
				b = rook(x,y,x1,y1);
				}//end rook

///bishop///

		      else if(abs(board[y][x])==3 ||
abs(board[y][x])==6){	   //if piece selected has value 3 and 6
				b = bishop(x,y,x1,y1);
				}//end bishop

			if(b==2){
	  if(abs(board[y][x])>=9 && abs(board[y][x])<=16){
			     char pp;

cout<<"\n\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\
\bwhich piece Q,R,H,B";
			      pp=getch();
			      if(turn==0){
			       if(pp=='r')
				board[y1][x1]=1;
			       else if(pp=='h')
				board[y1][x1]=2;
			       else if(pp=='b')
				board[y1][x1]=3;
			       else if(pp=='q')
				board[y1][x1]=4;
			       }
			      else{
			       if(pp=='r')
				board[y1][x1]=-1;
			       else if(pp=='h')
				board[y1][x1]=-2;
			       else if(pp=='r')
				board[y1][x1]=-3;
			       else if(pp=='q')
				board[y1][x1]=-4;
				}

			       board[y][x]=0;
			       killed =1;
				}
			  else if(abs(board[y][x])==5){
			     if(board[y][x]==5){
			       if(count1==1);
				 wrongStart();}
			     else if(board[y][x]==-5){
			       if(count1==1);
				 wrongStart();}
			     else{
			       board[y][x+1]=board[y1][x1];
			       board[y][x+2]=board[y][x];
			       board[y1][x1]=0;
			       board[y][x]=0;
			       killed=1;
				}
				}
			      printboard();
			     }
			else if(b==1)
			{
				if(turn==0)
				{
					if(board[y1][x1]<0)
					{
						board[y1][x1]=board[y][x];
						board[y][x] = 0;
						killed=1;
					}
				}
				if(turn!=0)
				{
					if(board[y1][x1]>0)
					{
						board[y1][x1]=board[y][x];
						board[y][x] = 0;
						killed=1;
					}
				}
				if(board[y1][x1]==0)
				{
					int temp=board[y][x];
					board[y][x]=board[y1][x1];
					board[y1][x1]=temp;
					killed=1;
				}
				printboard();
			}
			x=-1;
			y=-1;
			x1=-1;
			y1=-1;
		      setcolor(0);
		      outtextxy(30,340,"Check");
			if(killed==0){
				wrongStart();
				continue;
				}
			cleartext();
			setcolor(0);
			outtextxy(10,400,"Player Û");
			if(turn==0){
				check();
				turn=1;
				setcolor(2);
				outtextxy(10,400,"Player 2");
				}
			else{
				check();
				turn=0;
				setcolor(9);
				outtextxy(10,400,"Player 1");
				}
			}
		}
}

void printboard(){
	for(int i=0;i<8;i++){
		for(int j=0;j<8;j++){
			if((i+j)%2==0)
				setcolor(WHITE);
			else
				setcolor(BLACK);

			outtextxy(270+(j*45),105+(i*45),"ÛÛ");


			if(board[i][j]<0)
				setcolor(GREEN);
			else if(board[i][j]>0)
				setcolor(9);

			if(abs(board[i][j])>=9 && abs(board[i][j])<=16){
			  outtextxy(270+(j*45),105+(i*45),"P");}

			else if(abs(board[i][j])==1 || abs(board[i][j])==8){
			  outtextxy(270+(j*45),105+(i*45),"R");}

			else if(abs(board[i][j])==2 || abs(board[i][j])==7){
			  outtextxy(270+(j*45),105+(i*45),"H");
			  }
			else if(abs(board[i][j])==3 || abs(board[i][j])==6){
			  outtextxy(270+(j*45),105+(i*45),"B");
			  }
			else if(abs(board[i][j])==4){
			  outtextxy(270+(j*45),105+(i*45),"Q");
			  }
			else if(abs(board[i][j])==5){
			  outtextxy(270+(j*45),105+(i*45),"K");
			  }
			}
		}
	}
void wrongStart()
{
	cout<<"\nWrong Input\nPress any key to continue...";
	char ch=getch();
	if(ch==0){
		getch();
		}
	for(int i=1;i<=30;i++)
		for(int j=1;j<=4;j++)
		{
			gotoxy(i,j);
			cout<<" ";
		}
	gotoxy(1,1);
	cout<<"enter initial position ¯ ";
}
void cleartext(){
	for(int i=1;i<=27;i++)
		for(int j=1;j<=8;j++){
			gotoxy(i,j);
			cout<<" ";
			}
	gotoxy(1,1);
	cout<<"enter initial position ¯ ";
}



void initialize(){
	  setcolor(WHITE);
	  rectangle(250,90,610,450);

	  // Board Printing
	  for (int i=250;i<560;i+=90)
		for (int j=90;j<450;j+=90)
		 {
		 bar(i,j,i+45,j+45);
		 bar(i+45,j+45,i+90,j+90);
		 }

	   //Asigning the Values in the empty spaces
	   for(i=2;i<=5;i++)
		for(int j=0;j<=7;j++)
		 board[i][j] = 0;

		for(int j=0;j<=7;j++)
		{
		 board[0][j] = j+1;
		 board[1][j] = j+9;
		 board[7][j] = 0-(j+1);
		 board[6][j] = 0-(j+9);
		 }
	printboard();

	setcolor(YELLOW);

	  outtextxy(265,55,"A");
	  outtextxy(310,55,"B");
	  outtextxy(355,55,"C");
	  outtextxy(400,55,"D");
	  outtextxy(445,55,"E");
	  outtextxy(490,55,"F");
	  outtextxy(535,55,"G");
	  outtextxy(580,55,"H");

	  outtextxy(220,105,"1");
	  outtextxy(220,150,"2");
	  outtextxy(220,195,"3");
	  outtextxy(220,240,"4");
	  outtextxy(220,285,"5");
	  outtextxy(220,330,"6");
	  outtextxy(220,375,"7");
	  outtextxy(220,420,"8");
}


////HORSE//////

int horse(int x,int y,int x1,int y1)
{
	int a=0;
	if((y1==y+2 && x1==x+1)||(y1==y+2 && x1==x-1)||(y1==y+1 &&
x1==x+2)||(y1==y+1 && x1==x-2)||(y1==y-1 && x1==x+2)||(y1==y-1 &&
x1==x-2)||(y1==y-2 && x1==x+1)||(y1==y-2 && x1==x-1)){
		a = 1;
		}
	return a;
}

/////KING////

int king(int x,int y,int x1,int y1)
{
     int a = 0;
     if((y1==y+1 && x1==x)||(y1==y-1 && x1==x)||(y1==y+1 &&
x1==x+1)||(y1==y+1 && x1==x-1)||(y1==y-1 && x1==x+1)||(y1==y-1 &&
x1==x-1)||(y1==y && x1==x+1)||(y1==y && x1==x-1)){
	a = 1;
}
/////CASTLING//////

     else
if(board[y][x+1]==0&&board[y][x+2]==0&&(abs(board[y1][x1])
==abs(board[y][x+3])==1||abs(board[y1][x1])==
abs(board[y][x+3])==8)){

      return 2;
     }
		if(a==1)
		{
			 if(board[y][x]==5)
			 count1=1;
			 if(board[y][x]==-5)
			 count2=1;
		}
		return a;
}

//////BISHOP/////

int bishop(int x,int y,int x1,int y1)
{
		int a=1,i;
		if(abs(x1-x)!=abs(y1-y))
		{
			a=0;
		}

		if((x<x1)&&(y<y1))
		{
			for(i=1;(i+x)<x1;i++)
			{
				 if(board[y+i][x+i]!=0)
				 a=0;
			}
		}

       else if((x>x1)&&(y>y1)){
	for(i=1;(x-i)>x1;i++){
	 if(board[y-i][x-i]!=0)
	    a=0;
	 }
	}
	else if((x>x1)&&(y<y1)){
	 for(i=1;(x-i)>x1;i++){
	  if(board[y+i][x-i]!=0)
	    a=0;
	 }
	}
	else if((x<x1)&&(y>y1)){
	for(i=1;(y-i)>y1;i++){
	 if(board[y-i][x+i]!=0)
	    a=0;
	 }
	}
	return a;
	}


////////QUEEN///////
int queen(int x,int y,int x1,int y1){
   if(x==x1||y==y1){
  //if queen moves in + direction
	 return rook(x,y,x1,y1);
   }
   else if(abs(x1-x)==abs(y-y1)){
  //if queen moves in diagnol direction
	 return bishop(x,y,x1,y1);
   }
   else
	 return 0;
}


///ROOK////
int rook(int x,int y,int x1,int y1){
	int a=1;
	if(y1==y)
	{
		for(int i=x+1;i<x1;i++)
		{
			if(board[y1][i]!=0)
			{
				a = 0;
				break;
			}
		}
		for(i=x-1;i>x1;i--)
		{
			if(board[y1][i]!=0)
			{
				a = 0;
				break;
			}
		}
	}
	else if(x1==x)
	{
		for(int i=y+1;i<y1;i++)
		{
			if(board[i][x1]!=0)
			{
				a = 0;
				break;
			}
		}
		for(i=y-1;i>y1;i--)
		{
			if(board[i][x1]!=0)
			{
				a = 0;
				break;
			}
		}
	}
	else
	{
		a=0;
	}
	return a;
	}


///PAWN/////
int pawn(int x,int y,int x1,int y1){
	int a=0;
	if(turn==0){
		if(y==1){
		  if(y1==(y+2) && x1==x){
		if(board[y1][x1]==0&&board[y+1][x]==0){
				a = 1;
			   }
			}
			}
		 if(y1==y+1 && x1==x){
			if(board[y1][x1]==0){
				a = 1;
				}
			 }
	   else if(y1==(y+1) && (x1==(x+1)||x1==(x-1))){
		   if(board[y1][x1]<0){
			 a = 1;
			 }
		  }
		}
	  else if(turn==1){
		if(y==6){
		   if( y1==(y-2) && x1==x){
			if(board[y1][x1]==0&&board[y-1][x]==0){
				a = 1;
			   }
			}
		      }
		  if( y1==(y-1) && x1==x){
			if(board[y1][x1]==0){
				a = 1;
				}
			 }
	   else if(y1==(y-1) && (x1==(x-1)||x1==(x+1))){
		   if(board[y1][x1]>0){
			 a = 1;
			 }
		  }
	 }
   if(a==1)
   {
     if(turn==0)
     {
	 if(y1==7)
	 return 2;
     }
     else
     {
	if(y1==0)
	return 2;
     }
    }
 return a;
}

////////Check////////


void check()
{
	  int t=0,i,j,x1,y1;
	   if(turn==0){
	     for(i=0;i<=7;i++)
	     {
		 for(j=0;j<=7;j++)
		 {
			if(board[i][j]==-5)
			{
				 y1=i; x1=j;
				  break;
			}
		  }
	     }
       for(j=0;j<=7;j++){
	for(i=0;i<=7;i++){
	 if (t==1){
	    setcolor(9);
	    rectangle(20,335,100,365);
	    outtextxy(30,340,"Check");
	    break;
	   }

	 if(board[j][i]>=9 && board[j][i]<=16)
		t = pawn(i,j,x1,y1);
	 else if(board[j][i]==2 || board[j][i]==7)
		t = horse(i,j,x1,y1);
	 else if(board[j][i]==4)
		t = queen(i,j,x1,y1);
	 else if(board[j][i]==1 || board[j][i]==8)
		t = rook(i,j,x1,y1);
	 else if(board[j][i]==3 || board[j][i]==6)
		t = bishop(i,j,x1,y1);

	}// for
       }//  for
     }//endif turn
    else {
     for(i=0;i<=7;i++){
      for(j=0;j<=7;j++){
       if(board[i][j]==5){
	 y1=i; x1=j;
	  break;
	      }
	  }
       }
       for(j=0;j<=7;j++){
	for(i=0;i<=7;i++){
	 if (t==1){
	    setcolor(GREEN);
	     rectangle(20,335,100,365);
	    outtextxy(30,340,"Check");
	    break;
	   }

	 if(board[j][i]>=(-9) && board[j][i]<=(-16))
		t = pawn(i,j,x1,y1);
	 else if(board[j][i]==(-2) || board[j][i]==(-7))
		t = horse(i,j,x1,y1);
	 else if(board[j][i]==(-4))
		t = queen(i,j,x1,y1);
	 else if(board[j][i]==(-1) || board[j][i]==(-8))
		t = rook(i,j,x1,y1);
	 else if(board[j][i]==(-3) || board[j][i]==(-6))
		t = bishop(i,j,x1,y1);

	}// for
       }//  for
 }// end else
}


//////GAME OVER/////
int gameover(){
	int i,j,a=0,b=0;

	for(i=0;i<=7;i++)
	{
		for(j=0;j<=7;j++)
		{
		       if(board[i][j]==5)
		       b=1;
		       if(board[i][j]==-5)
		       a=1;
		}
	}
	if(b==0)
	{
	       setcolor(12);
	       outtextxy(30,340,"Game Over");
	       setcolor(GREEN);
	       outtextxy(30,300,"Player 1 Loses");
	       getch();
	       return 0;
	}
	else if(a==0)
	{
		setcolor(9);
		outtextxy(30,340,"Game Over");
		outtextxy(30,300,"Player 2 Loses");
		getch();
		return 0;
	}
return 1;
}