Help needed in Snake Game

[Ahmad Shoaib]

I am having problem in Snake game , my snake is moving rightwards only , it doesn't moves in any direction , I am confused what is wrong with my code . Please help me I will be grateful.

# include <iostream>
# include <cstdlib>
# include <string>
# include <Windows.h>
# include <ctime>
# include <cstdio>
# include <conio.h>

//# define UP 8;
//# define DOWN 2;
//# define Left 4;
//# define Left 6;

using namespace std;

void gotoxy(int x, int y )
{
   COORD Cord;
   Cord.X = x;
   Cord.Y = y;
   SetConsoleCursorPosition( GetStdHandle( STD_OUTPUT_HANDLE ),Cord );
}
struct SnakeStruct
{
	char SnakeArr[20][78];
	int Length;
	int Head_dir;
	int Head_x;
	int Head_y;
	int Tail_x;
	int Tail_y;
	int Tail_dir;
	int Food_x;
	int Food_y;
	int Score;
};


//void Display_Snake(char Snak[][79], Snake * Sarr);
void Print (SnakeStruct * Snake);
void Boundary_Initializer(SnakeStruct * Snake);
void Snake_Initializer(SnakeStruct * Snake);
void Snake_Movement(SnakeStruct * Snake);
void User_Press(SnakeStruct * Snake);

void main ()
{
		cout<<"\n\n\n\n\n\n\n";
	system("color 0C");
    cout<<"\t\t _______  __    _  _______  ___   _  _______   "<<endl;
	Sleep(200);
	system("color 0A");
    cout<<"\t\t|       ||  |  | ||   _   ||   | | ||       |  "<<endl;
	Sleep(200);
	system("color 0B");
    cout<<"\t\t|  _____||   |_| ||  |_|  ||   |_| ||    ___|  "<<endl;
	Sleep(200);
	system("color 0C");
    cout<<"\t\t| |_____ |       ||       ||      _||   |___   "<<endl;
    Sleep(200);
	system("color 0D");
	cout<<"\t\t|_____  ||  _    ||       ||     |_ |    ___| "<<endl;;
    Sleep(200);
	system("color 0E");
	cout<<"\t\t _____| || | |   ||   _   ||    _  ||   |___  "<<endl;
    Sleep(200);
	system("color 0A");
	cout<<"\t\t|_______||_|  |__||__| |__||___| |_||_______|  "<<endl<<endl;
	Sleep(200);
	system("color 0E");
	cout<<"                     .";
	for (int i=0;i<17;i++)
	{
		Sleep(100);
		cout<<" .";
	}
	Sleep(600);
	cout<<endl<<endl<<"                                !!!! START !!!!                                     "<<endl;
	Sleep(2500);
	system("CLS");
	SnakeStruct * Snake = new SnakeStruct;
	Snake_Initializer(Snake);//Initialize all the peremeters of Snake
	Boundary_Initializer(Snake);// Will Draw the boudary
	Print(Snake);
	while (1)
	{
		User_Press(Snake);
		Snake_Movement(Snake);
		//Display_Snake ( Snak , Sarr );
		Print(Snake);
		//Sleep(500);
		//Collision_Detect(Snakes);
	}
}
void Boundary_Initializer(SnakeStruct * Snake)
{
	gotoxy(0,0);
	cout<<"*******************************************************************************"<<endl;
	cout<<"********************* SNAKES GAME *********************** Highest Score : "<<endl;
	cout<<"*******************************************************************************"<<endl;
	cout<<"           Press 8 for UP , 2 for DOWN , 6 for RIGHT and 4 for Left           "<<endl;
	
	for(int i=0;i<20;i++)
	{
		Snake->SnakeArr[i][0] = '#';
		Snake->SnakeArr[i][77] = '#';
		Snake->SnakeArr[i][1] = '#';
		Snake->SnakeArr[i][76] = '#';
	}
	for(int i=0;i<78;i++)
	{
		Snake->SnakeArr[0][i] = '#';
		Snake->SnakeArr[19][i] = '#';
		Snake->SnakeArr[1][i] = '#';
		Snake->SnakeArr[18][i] = '#';
	}
		Snake->SnakeArr[4][5] = '#';
		Snake->SnakeArr[5][5] = '#';
		Snake->SnakeArr[6][5] = '#';
		Snake->SnakeArr[7][5] = '#';
		
		Snake->SnakeArr[4][5] = '#';
		Snake->SnakeArr[4][6] = '#';
		Snake->SnakeArr[4][7] = '#';
		Snake->SnakeArr[4][8] = '#';

		Snake->SnakeArr[15][67] = '#';
		Snake->SnakeArr[15][68] = '#';
		Snake->SnakeArr[15][69] = '#';
		Snake->SnakeArr[15][70] = '#';

		Snake->SnakeArr[15][71] = '#';
		Snake->SnakeArr[14][71] = '#';
		Snake->SnakeArr[13][71] = '#';
		Snake->SnakeArr[12][71] = '#';
	
}
void Snake_Initializer(SnakeStruct * Snake)
{
	Snake -> Length = 8;
	Snake -> Head_x = 9;
	Snake -> Head_y = 10;
	Snake -> Tail_x = 9;
	Snake -> Tail_y = 2;
	Snake -> Head_dir =  77;
	Snake -> Score = 0;
	for(int i=0;i<20;i++)
	{
		for (int j=0;j<78;j++)
		{
			Snake ->SnakeArr[i][j] = ' ';
		}
	}
	for(int i = Snake -> Head_y ; i > Snake -> Tail_y ; i--)
	{
		Snake->SnakeArr[Snake ->Tail_x][i] = '@';
	}
}
void Snake_Movement(SnakeStruct * Snake)
{
	int i;
	for(i = Snake -> Head_y ; i > Snake -> Tail_y ; i--)
	{
		Snake->SnakeArr[Snake ->Tail_x][i+1] = Snake->SnakeArr[Snake ->Tail_x][i];
	}
	Snake->SnakeArr[Snake ->Tail_x][i] =' ';
	if (Snake->Head_dir == 72)//Snake will move UP
	{
		Snake -> Head_x--;
	}
	if (Snake ->Head_dir == 80)//Snake will move Down
	{
		Snake ->Head_x++;
	}
	if (Snake ->Head_dir == 75)//Snake will move Left
	{
		Snake ->Tail_y--;
		Snake ->Head_y--;
	}
	if (Snake ->Head_dir == 77)//Snake will move RIGHT
	{
		Snake ->Tail_y++;
		Snake ->Head_y++;
	}
}
void Print(SnakeStruct * Snake)
{
	gotoxy(0,4);
	for(int i=0;i<20;i++)
	{
		cout<<" ";
		for(int j=0;j<78;j++)
		{
			cout<<Snake -> SnakeArr[i][j];
		}
		cout<<endl;
	}
}
void User_Press( SnakeStruct* Snake)
{ 
	int dir;
	if (kbhit())
	{
		dir = getch();
		if ((dir == 72)&&(Snake -> Head_dir!=72)&&(Snake->Head_dir!=80))//Snake will move UP
		{
			Snake->Head_dir = dir;
		}
		else if ((dir == 77)&&(Snake -> Head_dir!=77)&&(Snake->Head_dir!=75))//Snake will move RIGHT
		{
			Snake->Head_dir = dir;
		}
		else if ((dir == 80)&&(Snake -> Head_dir!=80)&&(Snake->Head_dir!=72))//Snake will move Down
		{
			Snake->Head_dir = dir;
		}
		else if ((dir == 75)&&(Snake -> Head_dir!=75)&&(Snake->Head_dir!=77))//Snake will move Left
		{
			Snake->Head_dir = dir;
		}
		if ((dir == 80)||(dir == 72)&&(Snake -> Head_dir == 72))
			cout<<"\a";
		else if ((dir == 75)||(dir == 77)&&(Snake -> Head_dir == 77))
			cout<<"\a";
		else if ((dir == 72)||(dir == 80)&&(Snake -> Head_dir == 80))
			cout<<"\a";
		else if  ((dir == 77)||(dir == 75)&&(Snake -> Head_dir == 75))
			cout<<"\a";

	if (Snake->Head_dir == 72)//Snake will move UP
	{
		Snake -> Head_x--;
	}
	if (Snake ->Head_dir == 80)//Snake will move Down
	{
		Snake ->Head_x++;
	}
	if (Snake ->Head_dir == 75)//Snake will move Left
	{
		Snake ->Tail_y--;
		Snake ->Head_y--;
	}
	if (Snake ->Head_dir == 77)//Snake will move RIGHT
	{
		Snake ->Tail_y++;
		Snake ->Head_y++;
	}
			//else if (dir == 27)// Snake game will exit
			//exit(-1);
	}
	
}

Regards
Ahmad Shoaib

[Ben Brown]

I believe the problem may be derived from the fact that COORD (on line 18) is never defined, whether it be a struct, class, or whatever. Since it is NEVER defined/created/initialized, you CANNOT create and object for it, and thus errors will occur.

[ui uiho]

Sleep(2500);
system("CLS");

there are betters ways to do this that avoid system functions.