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  1. #include <iostream>
  2. #include <windows.h>
  3. using namespace std;
  4. int main()
  5. {
  6.     int n, m, x, y;
  7.     bool L_pressed = false, R_pressed = false;
  8.     bool U_pressed = false, D_pressed = false;
  9.     cout << "Please input your map size (n, m): ";
  10.     cin >> n >> m;
  11.     cout << "Please input robot place (x, y): ";
  12.     cin >> x >> y;
  13.     while (true) {
  14.         // A boolean to record there's any key be pressed.
  15.         bool changed = false;
  16.  
  17.         // Left Key
  18.         int L_key = GetKeyState(VK_LEFT);
  19.         // if L_key >= 0 (More specifically, 0 or 1), means 
  20.         // L_key now is not being pressed. Let L_pressed be false.
  21.         // else, let L_pressed be true, and also set changed to be true.
  22.         if (L_key >= 0)
  23.             L_pressed = false;
  24.         else if (!L_pressed) {
  25.             changed = true, L_pressed = true;
  26.             // if the robot's position can still go left, we let it go.
  27.             if (y != 0)
  28.                 y--;
  29.         }
  30.  
  31.         // RIGHT Key
  32.         int R_key = GetKeyState(VK_RIGHT);
  33.         if (R_key >= 0)
  34.             R_pressed = false;
  35.         else if (!R_pressed) {
  36.             changed = true, R_pressed = true;
  37.             if (y != m-1)
  38.                 y++;
  39.         }
  40.         // UP Key
  41.         int U_key = GetKeyState(VK_UP);
  42.         if (U_key >= 0)
  43.             U_pressed = false;
  44.         else if (!U_pressed) {
  45.             changed = true, U_pressed = true;
  46.             if (x != 0)
  47.                 x--;
  48.         }
  49.         // DOWN Key
  50.         int D_key = GetKeyState(VK_DOWN);
  51.         if (D_key >= 0)
  52.             D_pressed = false;
  53.         else if (!D_pressed) {
  54.             changed = true, D_pressed = true;
  55.             if (x != n-1) {
  56.                 x++;
  57.             }
  58.         }
  59.         // If there's any key be pressed, print the map. 
  60.         if (changed) {
  61.             /*
  62.             // Use "====" to seperate two printed map.
  63.             for (int j = 0; j < m; j++) {
  64.                 cout << "=";
  65.             }
  66.             cout << endl;
  67.             */
  68.             // Use cls command to clean the input.
  69.             system("cls");
  70.             for (int i = 0; i < n; i++) {
  71.                 for (int j = 0; j < m; j++) {
  72.                     if (i == x && j == y)
  73.                         cout << '@';
  74.                     else
  75.                         cout << '.';
  76.                 }
  77.                 cout << endl;
  78.             }
  79.         }
  80.     }
  81.     return 0;
  82. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp:2:10: fatal error: windows.h: No such file or directory
 #include <windows.h>
          ^~~~~~~~~~~
compilation terminated.
stdout
copy 
Standard output is empty
https://ideone.com/r7ce0O
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
public

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