I’m writing a little snake in C++ for this tutorial. Faced a problem like this that I need to use kbhit () and getch () to read user input. These capabilities are available in the conio.h library, which is not available on Linux. Also, I tried this , but it didn’t help, the program just stopped when nothing happened.

I would like to know how to implement this on Linux, or are there any alternatives to this library?

Code:

# include & lt; iostream & gt;
#include & lt; conio.h & gt;
using namespace std;
bool GameOver;
const int height = 20;
const int width = 20;
int x, y, fruit_x, fruit_y, score;
enum eDirection {STOP, RIGHT, LEFT, UP, DOWN};
eDirection dir;
void setup () {
  GameOver = false;
  dir = STOP;
  x = width / 2 - 1;
  y = height / 2 - 1;
  fruit_x = rand ()% width;
  fruit_y = rand ()% height;
  score = 0;
}
void draw () {
  system ("clear");
  for (int i = 0; i & lt; width; i ++)
  {
    cout & lt; & lt; "#";
  }
  cout & lt; & lt; endl;
  for (int i = 0; i & lt; height; i ++)
  {
    for (int j = 0; j & lt; width; j ++)
    {
      if (j == 0 || j == width - 1)
    {
      cout & lt; & lt; "#";
    }
    if (i == y & amp; & amp; j == x)
    {
      cout & lt; & lt; "0";
    }
    else if (i == fruit_y & amp; & amp; j == fruit_x)
    {
      cout & lt; & lt; "F";
    }
    else
    {
      cout & lt; & lt; "";
    }
  }
  cout & lt; & lt; endl;
  }
  for (int i = 0; i & lt; width; i ++)
  {
    cout & lt; & lt; "#";
  }
  cout & lt; & lt; endl;
}
void input () {
  if (_kbhit)
  {
    switch (getch ())
  {
    case 'a':
      dir = LEFT;
      break;
    case 'd':
      dir = RIGHT;
      break;
    case 'w':
      dir = UP;
      break;
    case 's':
      dir = DOWN;
      break;
    case 'x':
      GameOver = true;
      break;
    }
  }
}
void logic () {
  switch (dir)
  {
  case LEFT:
    x--;
    break;
  case RIGHT:
    x ++;
    break;
  case UP:
    y--;
    break;
  case DOWN:
    y ++;
    break;
  }
}
int main () {
  setup ();
  while (! GameOver)
  {
    draw ();
    input ();
    logic ();
  }
}

Answer 1

Got a response on English StackOverflow from javad m

Like zoelabbb said here ,

Step 1: Open a terminal and do the following:

sudo apt-get update & amp; & amp; upgrade
sudo apt-get install git
git clone https://github.com/zoelabbb/conio.h.git
cd conio.h

Step 2:

sudo cp conio.h / usr / include /

or (step 2)

In the GUI using the open-as-administrator package:

Copy file conio.h - & gt; !! copy the file, not the folder !!
Go to / usr / include /
Right click on / usr / include /
Select "Open as administrator"
Paste the file conio.h

Finally , after steps 1 and 2 , you can use #include & lt; conio.h & gt; in your code.