Car Racing Game Using C++ Coding Language

The dos.h is a C language header file. This library includes routines for handling interrupts, making sound, handling dates and times, etc. It is exclusive to Borland and functions with compilers like Turbo C Compiler.

It is simpler for the user to use the built-in functionality when the <windows.h> header file is used to access the Win32 API methods. If the built-in functions are utilized or included in the main file, Win32 executable is used in the source code. The library and the functions used in libraries like <stdio.h> or <stdlib.h> are specifically included in the header file. It uses various components that enable modification, extension, and replacement of the items in libraries in addition to the capabilities of macros. The string functions that enable the inclusion of C library functions in the Windows kernel utilize UNICODE.

Code for Car Racing Game in C++

#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;
}

output :

• The cursor is placed at the specified spot on the screen via the gotoxy() function. This indicates that the gotoxy() method can be used to move the pointer around the screen. The main purpose of it is to print text wherever the pointer is placed.
• COORD: is a framework for holding screens. X and Y are COORDinates. A handle to a standard device is returned by the GetStdHandle function (input, output, or error). A handle is an access point to a Windows kernel object provided via an index in the system table. I believe Std Output Handle() returns the STD OUTPUT HANDLE value to identify the active console buffer for standard output. The cursor location is set using SetControlCursorPosition (obviously).
• The Standard Input (STDIN), Standard Output (STDOUT), and Standard Error Handles (STDERR) may all be retrieved using the GetStdHandle() method. One argument, STD_INPUT_HANDLE,STD_OUTPUT_HANDLE, or STD_ERROR_HANDLE, is required by the GetStdHandle() function.
• The built-in srand() function is part of the C++ STL, which is a header file specified in cstdlib. Random number generators are initialised using the srand() function. The srand() function establishes the initial value for a stream of pseudo-random numbers. The rand() seed is set as if srand(1) had been called at programme startup if srand() is not invoked. The generator starts from a different beginning point if seed is set to any other value.

Thank You……