origin.cpp

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

#define SCREEN_WIDTH 90
#define SCREEN_HEIGHT 26
#define WIN_WIDTH 70

using namespace std;

HANDLE console = GetStdHandle(STD_OUTPUT_HANDLE);
COORD CursorPosition;

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);
}
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);
  srand( (unsigned)time(NULL));

  do{
    system("cls");
    gotoxy(10,5); cout<<" -------------------------- ";
    gotoxy(10,6); cout<<" |        Car Game        | ";
    gotoxy(10,7); cout<<" --------------------------";
    gotoxy(10,9); cout<<"1. Start Game";
    gotoxy(10,10); cout<<"2. Instructions";
    gotoxy(10,11); cout<<"3. Quit";
    gotoxy(10,13); 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;
}