#include <iostream.h>
#include <conio.h>              //Clear Screen... clrscr()
#include <dos.h>                //for delay()

char kybd;                      //to store a keystroke pressed
char GameOver;		        //is 'y' or 'n', means ended or not
int shipx, shipy;               //position of ship
int shiplife;                   //if shiplife is 0, game over
int jetx, jety;                 //position of jet
int jetlife;                    //if jetlife is 0, game over too
void get_input()
{
	kybd=getch();	
}
//Ship Exlosion
void ship_explode()
{
	sound(1000);
	gotoxy(shipx, shipy);
	cout<<".";
	delay (1000);
        gotoxy(shipx, shipy);
	cout<<"(.)";
	delay (1000);
        gotoxy(shipx, shipy);
	cout<<"((.))";
	delay (1000);
	nosound();
	if (shiplife==0) GameOver='y';
}
                         
//Jet Explode
void jet_explode()
{
	sound(1000);
	gotoxy(jetx, jety);
	cout<<".";
	nosound();
	jetlife--;
	if (shiplife==0) GameOver='y';
}
// Ship Fire
void ship_fire()
{
	int y;
	for(y=shipy-1; y>1; y--)
	{
		gotoxy(shipx,y);
		cout<<"  |";
		delay(10);
	}
	if (shipx==jetx+2) jet_explode();
	if (shipx==jetx+1) jet_explode();
	if (shipx==jetx-1) jet_explode();
	if (shipx==jetx-2) jet_explode();

}

//Jet Fire
void jet_fire()
{
	int y;
	for(y=jety; y<23; y++)
	{
		gotoxy(jetx,y);
		cout<<"   |";
		delay(10);
	}
       if (jetx==shipx+2) ship_explode();
       if (jetx==shipx+1) ship_explode();
       if (jetx==shipx-1) ship_explode();
       if (jetx==shipx-2) ship_explode();

}


//Process
void do_process()
{
        //Ship Control

	if (kybd=='j')  shipx--;           //Ship move left
	else if (kybd=='l') shipx++;       //Ship move right
	else if (kybd=='i') shipy--;       //Ship move up
	else if (kybd=='k') shipy++;       //Ship move down
	else if (kybd=='o') ship_fire();     //Ship Fire

	//Jet Control

	if (kybd=='a') jetx--;             //Jet move left
	else if (kybd=='d') jetx++;        //Jet move right
	else if (kybd=='w') jety--;        //Jet move up
	else if (kybd=='s') jety++;        //Jet move down
	else if(kybd=='z') jet_fire();     //Jet Fire

	//Quit Program
	if (kybd=='q') GameOver='y';       //Program Quit

	//Limit Ship
	if (shipx<1) shipx=1;
	if (shipx>75) shipx=75;            //Minus 5 Chars cuz Ship 5 Chars
	if (shipy<1) shipy=1;
	if (shipy>25) shipy=25;

	//Limit Jet
	if (jetx<1) jetx=1;
	if (jetx>75) jetx=75;               //Minus 7 Chars cuz Jet 7 Chars
	if (jety<1) jety=1;
        if (jety>25) jety=25;

}
void give_output()
{
	clrscr();

	//Ship Life
	if(shiplife>0)
	{
		gotoxy(shipx, shipy);
		cout<<"_[^]_";
	}

        //Jet Life
	if(jetlife>0)
	{
		gotoxy(jetx,jety);
		cout<<"=[^]=";
	}
}
void main()
{
	clrscr();

	shipx=40;
	shipy=23;
	shiplife=1;

	jetx=20;
	jety=2;
	jetlife=1;

	GameOver='n';          //Game is not over yet at the beginning..
	while (GameOver!='y')
	{
		get_input();
		do_process();
		give_output();
	}
	//Message For Loser
	cout<<" GAME OVER!"<<endl;
	delay(1000);
}