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Input issue

toomanystars (151)
Hi guys,

Working on a little stub program for a console rpg. However, I am new to the #include <Windows.h> header and it's causing me some issues. Here's the code...

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

using namespace std;


char world[20][20]={'0','0','0','0','0','0','0','0',' ','0','0','0','0','0','0','0','0','0',' ','0',
					'0',' ',' ',' ','0','0','0',' ',' ',' ','0','0','0',' ','0','0','0','0',' ','0',
					'0',' ',' ','0','0','0','0',' ','0',' ',' ','0','0',' ',' ','0','0','0',' ','0',
					'0',' ',' ','0','0','0','0',' ','0','0',' ','0','0',' ',' ','0','0','0',' ','0',
					'0',' ',' ','0','0','0','0',' ','0','0',' ','0',' ',' ',' ',' ','0','0',' ','0',
					'0','0',' ',' ',' ','0',' ',' ','0','0',' ',' ',' ',' ',' ',' ','0','0',' ','0',
					'0','0',' ',' ',' ','0',' ','0','0','0','0','0',' ',' ',' ',' ','0','0',' ','0',
					'0','0',' ',' ',' ',' ',' ',' ',' ','0','0','0',' ',' ',' ',' ',' ','0',' ','0',
					'0','0','0','0','0','0','0','0',' ','0','0',' ',' ',' ','0',' ',' ','0',' ','0',
					'0','0','0','0','0','0','0','0',' ','0','0',' ',' ','0','0','0',' ','0',' ','0',
					'0','0','0','0','0','0','0','0',' ',' ',' ',' ',' ','0','0','0',' ',' ',' ','0',
					'0',' ',' ',' ','0','0','0',' ',' ','0',' ',' ',' ','0','0','0','0',' ',' ','0',
					'0',' ','0','0','0','0','0',' ','0','0',' ',' ',' ',' ','0','0','0',' ',' ','0',
					'0',' ','0','0','0','0','0',' ','0','0','0',' ',' ',' ','0','0','0','0',' ','0',
					'0',' ',' ','0','0','0','0',' ','0','0','0','0',' ','0','0','0',' ',' ',' ','0',
					'0','0',' ',' ',' ','0',' ',' ','0','0','0','0',' ','0','0','0',' ','0',' ','0',
					'0','0',' ',' ',' ','0',' ','0','0','0','0','0',' ','0','0','0',' ','0',' ','0',
					'0','0',' ',' ',' ',' ',' ',' ',' ','0','0','0',' ','0','0','0',' ','0',' ','0',
					'0','0','0','0','0','0','0','0',' ','0','0','0',' ',' ',' ',' ',' ','0',' ','0',
					'0','0','0','0','0','0','0','0',' ','0','0','0','0','0','0','0','0','0',' ','0',

					};


void print_world(char w[20][20],const int number, int& the_x, int& the_y);
void clear_screen();
bool check_collision(char w[][20], int the_size, int the_x, int the_y);

int main(){

	char dummy;
	int x=1, y=1;
	bool collision;

	string direction;
	do{
			
		clear_screen();

		if(GetAsyncKeyState(VK_RIGHT)){
			x++;
			collision=check_collision(world,20,x,y);
			if(collision)
				x--;
			direction="west";

		}
		if(GetAsyncKeyState(VK_LEFT)){
			x--;
			collision=check_collision(world,20,x,y);
			if(collision)
				x++;
			direction="east";
		}
		if(GetAsyncKeyState(VK_UP)){
			y--;
			collision=check_collision(world,20,x,y);
			if(collision)
				y++;

			direction="north";
		}
		if(GetAsyncKeyState(VK_DOWN)){
			y++;
			collision=check_collision(world,20,x,y);
			if(collision)
				y--;
			direction="south";
		}


		print_world(world,20,x,y);
		
		cout<<direction<<endl;//problem here

		

		

		Sleep(100);


	}while(true);

	cin>>dummy;


	return 0;
}

void print_world(char w[20][20],const int number, int& the_x, int& the_y){

	for(int i=0;i<number;i++){

		for(int j=0;j<number;j++){
			
		
			if(the_x==j && the_y==i)
				cout<<'x';

			else if(w[i][j]=='0')
				cout<<static_cast<char>(178);

			else 
				cout<<world[i][j];	

		}
		
		cout<<endl;
	
	}
}
bool check_collision(char w[][20], int the_size, int the_x, int the_y){

	for(int i=0;i<the_size;i++){
	
		for(int j=0;j<the_size;j++){
			
			if(w[the_y][the_x]=='0')
				return true;
			else
				return false;
		}
	
	}
}
void clear_screen(){//need windows header file for this

	HANDLE handle_out;
	COORD position;

	handle_out=GetStdHandle(STD_OUTPUT_HANDLE);//std output handle is the monitor

	position.X=0;
	position.Y=0;

	SetConsoleCursorPosition(handle_out,position);//sets cursor in the specified position
}



The issue is simple (albeit not for me). When I enter a number key, it displays a direction at the bottom of the screen. However, next loop, the old direction is not destroyed, rather written over. Does anyone know how to solve this problem?

Thanks,

Mike
whitenite1 (1785)
@toomanystars

Changed it up just a bit. If no collision is detected with the direction you're trying to go, THEN it's allowed and x or y is adjusted. Otherwise, direction will equal " WALL ". setcursor() just turns off the blinking cursor on the screen. Hope this was helpful..

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// Console RPG.cpp : main project file.
#include <iostream>
#include <Windows.h>
#include <cstdlib>
#include <ctime>
#include <conio.h>
#include <string>

using namespace std;

#define UP 72
#define LEFT 75
#define RIGHT 77
#define DOWN 80

char world[20][20]={
	{'0','0','0','0','0','0','0','0',' ','0','0','0','0','0','0','0','0','0',' ','0'},
	{'0',' ',' ',' ','0','0','0',' ',' ',' ','0','0','0',' ','0','0','0','0',' ','0'},
	{'0',' ',' ','0','0','0','0',' ','0',' ',' ','0','0',' ',' ','0','0','0',' ','0'},
	{'0',' ',' ','0','0','0','0',' ','0','0',' ','0','0',' ',' ','0','0','0',' ','0'},
	{'0',' ',' ','0','0','0','0',' ','0','0',' ','0',' ',' ',' ',' ','0','0',' ','0'},
	{'0','0',' ',' ',' ','0',' ',' ','0','0',' ',' ',' ',' ',' ',' ','0','0',' ','0'},
	{'0','0',' ',' ',' ','0',' ','0','0','0','0','0',' ',' ',' ',' ','0','0',' ','0'},
	{'0','0',' ',' ',' ',' ',' ',' ',' ','0','0','0',' ',' ',' ',' ',' ','0',' ','0'},
	{'0','0','0','0','0','0','0','0',' ','0','0',' ',' ',' ','0',' ',' ','0',' ','0'},
	{'0','0','0','0','0','0','0','0',' ','0','0',' ',' ','0','0','0',' ','0',' ','0'},
	{'0','0','0','0','0','0','0','0',' ',' ',' ',' ',' ','0','0','0',' ',' ',' ','0'},
	{'0',' ',' ',' ','0','0','0',' ',' ','0',' ',' ',' ','0','0','0','0',' ',' ','0'},
	{'0',' ','0','0','0','0','0',' ','0','0',' ',' ',' ',' ','0','0','0',' ',' ','0'},
	{'0',' ','0','0','0','0','0',' ','0','0','0',' ',' ',' ','0','0','0','0',' ','0'},
	{'0',' ',' ','0','0','0','0',' ','0','0','0','0',' ','0','0','0',' ',' ',' ','0'},
	{'0','0',' ',' ',' ','0',' ',' ','0','0','0','0',' ','0','0','0',' ','0',' ','0'},
	{'0','0',' ',' ',' ','0',' ','0','0','0','0','0',' ','0','0','0',' ','0',' ','0'},
	{'0','0',' ',' ',' ',' ',' ',' ',' ','0','0','0',' ','0','0','0',' ','0',' ','0'},
	{'0','0','0','0','0','0','0','0',' ','0','0','0',' ',' ',' ',' ',' ','0',' ','0'},
	{'0','0','0','0','0','0','0','0',' ','0','0','0','0','0','0','0','0','0',' ','0'}
};

void print_world(char w[20][20],const int number, int& the_x, int& the_y);
void clear_screen();
bool check_collision(char w[][20], int the_size, int dir1, int dir2, int the_x, int the_y);
// dir1 -1 for up, 1 for down, otherwise 0
// dir2 -1 for left, 1 for right, otherwise 0
// If adding or subtracting the numbers, does nor cause a collision, then x or y is added or subtracted

void setcursor(bool, DWORD);

int main()
{
	
	setcursor(0, 0);
	char dummy = ' ';
	int x=1, y=1;
	bool collision;
	print_world(world,20,x,y);
	string direction;
	for (;;)
	{
		clear_screen();
		int ch = _getch();
		direction = "     ";
		switch(ch)
		{
		case RIGHT:
			{
				collision=check_collision(world,20,0,1,x,y);
				if(!collision)
				{
					x++;
					direction="East";
				}
				break;
			}
		case LEFT:
			{
				collision=check_collision(world,20,0,-1,x,y);
				if(!collision)
				{
					x--;
					direction="West";
				}
				break;
			}
		case UP:
			{
				collision=check_collision(world,20,-1,0,x,y);
				if(!collision)
				{
					y--;
					direction="North";
				}
				break;
			}
		case DOWN:
			{
				collision=check_collision(world,20,1,0,x,y);
				if(!collision)
				{
					y++;
					direction="South";
				}
				break;
			}
		}

		print_world(world,20,x,y);
		if(collision)
			direction = "WALL ";

		cout << direction << endl;

		Sleep(100);

	};

	cin>>dummy;
	return 0;
}

void print_world(char w[][20],const int number, int& the_x, int& the_y)
{
	for(int i=0;i<number;i++)
	{
		for(int j=0;j<number;j++)
		{
			if(the_x==j && the_y==i)
				cout<<'x';

			else if (w[i][j]=='0')
				cout << '\xB2';

			else 
				cout<<world[i][j];	

		}

		cout<<endl;

	}
}

bool check_collision(char w[][20], int the_size, int dir1, int dir2,int the_x, int the_y)
{
	if(w[the_y+dir1][the_x+dir2]=='0')
		return true;
	else
		return false;
}

void clear_screen()
{
	HANDLE handle_out;
	COORD position;

	handle_out=GetStdHandle(STD_OUTPUT_HANDLE);//std output handle is the monitor

	position.X=0;
	position.Y=0;

	SetConsoleCursorPosition(handle_out,position);//sets cursor in the specified position
}

void setcursor(bool visible, DWORD size)
{
	HANDLE console = GetStdHandle(STD_OUTPUT_HANDLE);
	if(size == 0)
	{
		size = 20;	// default cursor size Changing to numbers from 1 to 20, decreases cursor width
	}
	CONSOLE_CURSOR_INFO lpCursor;	
	lpCursor.bVisible = visible;
	lpCursor.dwSize = size;
	SetConsoleCursorInfo(console,&lpCursor);
}
Last edited on
toomanystars (151)
Thanks whitenite1, it works splendidly after I initialize "collision". Sorry for the belated reply!


Mike
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