hi can anyone help me in making this code work ..i will be very grateful to him/her

#include <iostream>
#include <stdio.h>
#include <conio.h>
#include <windows.h>
using namespace std;

#define BLACK 0
#define BLUE 1
#define GREEN 2
#define CYAN 3
#define RED 4
#define MAGENTA 5
#define BROWN 6
#define LIGHTGREY 7
#define DARKGREY 8
#define LIGHTBLUE 9
#define LIGHTGREEN 10
#define LIGHTCYAN 11
#define LIGHTRED 12
#define YELLOW 14
#define WHITE 15
#define BLINK 128

void printxy(int xpos, int ypos, int col, char ch)
 COORD scrn;
 scrn.X = xpos; scrn.Y = ypos;
 HANDLE  screen=GetStdHandle(STD_OUTPUT_HANDLE);
 DWORD useless;

 SMALL_RECT windowSize = {0, 0, 100, 100};
 SetConsoleWindowInfo(screen, TRUE, &windowSize);
//Printing code ends

// Macros
#define LEFT 1
#define RIGHT 2
#define UP 3
#define DOWN 4

int score;

struct snakeData
int length;
int headX;
int headY;
int headDir;
int tailX;
int tailY;
int tailDir;
int BendX[1000];
int BendY[1000];
int BendDir[1000];

}snake; //variable of snake structure

void userinput ()// This Function changes the direction of motion of snake according to input.
  static int i = 0;
  if ( i > 1000) i = 0; // Makes the bend array a circular queue
  static int j = 0;
  if ( j > 1000) j = 0;
  char input;
  if (_kbhit ())
    input = _getch ();
    //Change Respective Return value to our MACRO Direction Code Value 
     if (input == 80) input = DOWN;
     if (input == 72) input = UP;
     if (input == 75) input = LEFT;
     if (input == 77) input = RIGHT;

   //Change head direction based on logic
     if (input == LEFT && snake.headDir != RIGHT && snake.headDir != LEFT)
          snake.headDir = LEFT; 
          snake.BendX [i] = snake.headX;
          snake.BendY [i] = snake.headX;
          snake.BendDir [i] = LEFT;
     if (input == RIGHT && snake.headDir != LEFT && snake.headDir != RIGHT)
          snake.headDir = RIGHT;
          snake.BendX [i] = snake.headX;
          snake.BendY [i] = snake.headY;
          snake.BendDir [i] = RIGHT;
     if (input == UP && snake.headDir != DOWN && snake.headDir != UP)
          snake.headDir = UP;
          snake.BendX [i] = snake.headX;
          snake.BendY [i] = snake.headY;
          snake.BendDir [i] = UP;
    if (input == DOWN && snake.headDir != UP && snake.headDir != DOWN)
          snake.headDir = DOWN; 
          snake.BendX [i] = snake.headX;
          snake.BendY [i] = snake.headY;
          snake.BendDir [i] = DOWN;

   //Code to change the y direction at respective time
   if (snake.tailX == snake.BendX [j] && snake.tailY == snake.BendY [j])
        snake.tailDir = snake.BendDir [j];

void movesnake () //Moves The Snake Across the Screen
 //Move the Head
 if (snake.headDir == LEFT)
   snake.headX --; 
 if (snake.headDir == RIGHT) 
   snake.headX ++; 
 if (snake.headDir == UP) 
   snake.headY --;
 if (snake.headDir == DOWN) 
   snake.headY ++; 
 printxy(snake.headX, snake.headY,YELLOW,'@');
 //Move the Tail
  printxy(snake.tailY, snake.tailY,YELLOW,'@');
 if (snake.tailDir == LEFT)
    snake.tailX --; 
 if (snake.tailDir == RIGHT) 
   snake.tailX ++; 
 if (snake.tailDir == UP) 
    snake.tailY --;
 if (snake.tailDir == DOWN) 
    snake.tailY ++; 

void gameengine ()//Soul of our game.
 while (1) 

void initscreen(){

for (int i=snake.length;i>0;i--){


void initGame(){

int i;
snake.headX =20;
snake.headY =20;
snake.headDir = RIGHT;
snake.tailX = snake.headX - snake.length;
snake.tailY = snake.headY;
snake.tailDir = RIGHT;

for (int i = 0; i <1000;i++) // There is no bend initally
          snake.BendX[i] = 0;
           snake.BendY[i] = 0; 

int main()


gameengine ();
userinput ();
movesnake () ;

return 0;



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