Cargame.cpp

#include<iostream>
#include<conio.h>
#include<dos.h>
#include<windows.h>
#include<time.h>

#define SCREEN_WIDTH 100
#define SCREEN_HEIGHT 30
#define WIN_WIDTH 100  //this one moves the score menu to wards right of the screen

using namespace std;

HANDLE console = GetStdHandle(STD_OUTPUT_HANDLE); //The GetStdHandle() function takes a single parameter that can be one of three values, STD_INPUT_HANDLE, STD_OUTPUT_HANDLE, and STD_ERROR_HANDLE.
//The GetStdHandle() function gives us a mechanism for retrieving the standard input, STDIN, the Standard Output, STDOUT, and the standard error handles, STDERR
COORD CursorPosition;
// Create a COORD structure and fill in its members.
    // This specifies the new position of the cursor that we will set.

int enemyY[3];
int enemyX[3];
int enemyFlag[3];
char car[4][4] = {  ' ','#','#',' ',
					'#','#','#','#',
					' ','#','#',' ',
					'#','#','#','#' };

int carPos = WIN_WIDTH/2;
int score = 0;

void gotoxy(int x, int y){
	CursorPosition.X = x;
	CursorPosition.Y = y;
	SetConsoleCursorPosition(console, CursorPosition);
}
void setcursor(bool visible, DWORD size) {
	if(size == 0)
		size = 20;

	CONSOLE_CURSOR_INFO lpCursor;
	lpCursor.bVisible = visible;
	lpCursor.dwSize = size;
	SetConsoleCursorInfo(console,&lpCursor);
}
void drawBorder(){
	for(int i=0; i<SCREEN_HEIGHT; i++){
		for(int j=0; j<17; j++){
			gotoxy(0+j,i); cout<<" ";
			gotoxy(WIN_WIDTH-j,i); cout<<" ";
		}
	}
	for(int i=0; i<SCREEN_HEIGHT; i++){
		gotoxy(SCREEN_WIDTH,i); cout<<" ";
	}
}
void genEnemy(int ind){
	enemyX[ind] = 17 + rand()%(33); //17 //33
}
void drawEnemy(int ind){
	if( enemyFlag[ind] == true ){
		gotoxy(enemyX[ind], enemyY[ind]);   cout<<"****";
		gotoxy(enemyX[ind], enemyY[ind]+1); cout<<" ** ";
		gotoxy(enemyX[ind], enemyY[ind]+2); cout<<"****";
		gotoxy(enemyX[ind], enemyY[ind]+3); cout<<" ** ";
	}
}
void eraseEnemy(int ind){
	if( enemyFlag[ind] == true ){
		gotoxy(enemyX[ind], enemyY[ind]);   cout<<"    ";
		gotoxy(enemyX[ind], enemyY[ind]+1); cout<<"    ";
		gotoxy(enemyX[ind], enemyY[ind]+2); cout<<"    ";
		gotoxy(enemyX[ind], enemyY[ind]+3); cout<<"    ";
	}
}
void resetEnemy(int ind){
	eraseEnemy(ind);
	enemyY[ind] = 1;
	genEnemy(ind);
}

void drawCar(){
	for(int i=0; i<4; i++){
		for(int j=0; j<4; j++){
			gotoxy(j+carPos, i+22); cout<<car[i][j];
		}
	}
}
void eraseCar(){
	for(int i=0; i<4; i++){
		for(int j=0; j<4; j++){
			gotoxy(j+carPos, i+22); cout<<" ";
		}
	}
}

int collision(){
	if( enemyY[0]+4 >= 23 ){
		if( enemyX[0] + 4 - carPos >= 0 && enemyX[0] + 4 - carPos < 9  ){
			return 1;
		}
	}
	return 0;
}
void gameover(){
	system("cls");
	cout<<endl;
	cout<<"\t\t--------------------------"<<endl;
	cout<<"\t\t-------- Game Over -------"<<endl;
	cout<<"\t\t--------------------------"<<endl<<endl;
	cout<<"\t\tPress any key to go back to menu.";
	getch();
}
void updateScore(){
	gotoxy(WIN_WIDTH + 7, 5);cout<<"Score: "<<score<<endl;
}

void instructions(){

	system("cls");
	cout<<"Instructions";
	cout<<"\n----------------";
	cout<<"\n Avoid Cars by moving left or right. ";
	cout<<"\n\n Press 'a' to move left";
	cout<<"\n Press 'd' to move right";
	cout<<"\n Press 'escape' to exit";
	cout<<"\n\nPress any key to go back to menu";
	getch();
}

void play(){
	carPos = -1 + WIN_WIDTH/2;
	score = 0;
	enemyFlag[0] = 1;
	enemyFlag[1] = 0;
	enemyY[0] = enemyY[1] = 1;

	system("cls");
	drawBorder();
	updateScore();
	genEnemy(0);
	genEnemy(1);

	gotoxy(WIN_WIDTH + 7, 2);cout<<"Car Game";
	gotoxy(WIN_WIDTH + 6, 4);cout<<"----------";
	gotoxy(WIN_WIDTH + 6, 6);cout<<"----------";
	gotoxy(WIN_WIDTH + 7, 12);cout<<"Control ";
	gotoxy(WIN_WIDTH + 7, 13);cout<<"-------- ";
	gotoxy(WIN_WIDTH + 2, 14);cout<<" A Key - Left";
	gotoxy(WIN_WIDTH + 2, 15);cout<<" D Key - Right";

	gotoxy(18, 5);cout<<"Press any key to start";
	getch();
	gotoxy(18, 5);cout<<"                      ";

	while(1){
		if(kbhit()){
			char ch = getch();
			if( ch=='a' || ch=='A' ){
				if( carPos > 18 )
					carPos -= 4;
			}
			if( ch=='d' || ch=='D' ){
				if( carPos < 50 )
					carPos += 4;
			}
			if(ch==27){
				break;
			}
		}

		drawCar();
		drawEnemy(0);
		drawEnemy(1);
		if( collision() == 1  ){
			gameover();
			return;
		}
		Sleep(50);
		eraseCar();
		eraseEnemy(0);
		eraseEnemy(1);

		if( enemyY[0] == 10 )
			if( enemyFlag[1] == 0 )
				enemyFlag[1] = 1;

		if( enemyFlag[0] == 1 )
			enemyY[0] += 1;

		if( enemyFlag[1] == 1 )
			enemyY[1] += 1;

		if( enemyY[0] > SCREEN_HEIGHT-4 ){
			resetEnemy(0);
			score++;
			updateScore();
		}
		if( enemyY[1] > SCREEN_HEIGHT-4 ){
			resetEnemy(1);
			score++;
			updateScore();
		}
	}
}

int main()
{
	setcursor(0,0); // It does cursor indication

	srand( (unsigned)time(NULL));
	//srand(time(NULL));
//makes use of the computer's internal clock to control the choice of the seed.  Since time is continually changing, the seed is forever changing.  Remember, if the seed number remains the same, the sequence of numbers will be repeated for each run of the program.

	do{
		system("cls");
		//in brackets first one moves left or right
		//in brackets second one moves up and down
		gotoxy(50,5); cout<<" -------------------------- ";
		gotoxy(50,6); cout<<" |        Car Game        | ";
		gotoxy(50,7); cout<<" --------------------------";
		gotoxy(50,9); cout<<"1. Start Game";
		gotoxy(50,10); cout<<"2. Instructions";
		gotoxy(50,11); cout<<"3. Quit";
		gotoxy(50,13); cout<<"Select option: ";
		char op = getche();

		if( op=='1') play();
		else if( op=='2') instructions();
		else if( op=='3') exit(0);

	}while(1);

	return 0;
}