Want to write a program that takes a number input from user and prints weather or not it is even

Answers

• Paddygree1988

  February 2016 edited February 2016

  Which kind of input do you want to track?? You can assing Mouse inputs oder Key inputs of the keyboard for example.

  And there are several Events that are called every time a input is taken by the user.

  For Example:

  int xPos = 0;
  int yPos = 0;
  
  void setup() {
     size( 600, 600 ); 
     background( 0 );
  
     frameRate( 60 );
  }
  
  
  void draw() { 
    background( 0 );
  
    fill( 255 );
    rect( xPos, yPos, 200, 200 );
  } 
  
  void keyPressed() { 
    switch( keyCode ) {
      case 37 : {
          if( xPos > 0 )
            xPos -= 5;
  
          break;
      }
      case 38 : {
        if( yPos > 0 )
          yPos -= 5;      
  
        break;
      }
      case 39 : {
        if( xPos + 200 < width )
          xPos += 5;  
  
        break;
      }
      case 40 : {
        if( yPos + 200 < height )
          yPos += 5;  
  
        break;
      }
    }
  }
  

  You can move the white rect by pressing the arrow keys.
• erkosone

  February 2016

  add this to your program:

  // lista de constantes para las teclas..
  // -------------------------------------
  final int _UP =     38;
  final int _DOWN =   40;
  final int _LEFT =   37;
  final int _RIGHT =  39;
  final int _SPACE =  32;
  final int _ESC =    27;
  final int _ENTER =  10;
  final int _F1 =     112;
  final int _F2 =     113;
  final int _F3 =     114;
  final int _F4 =     115;
  final int _F5 =     116;
  final int _F6 =     117;
  final int _F7 =     118;
  final int _F8 =     119;
  final int _F9 =     120;
  final int _F10 =    121;
  
  final int _PRINT =  154;
  final int _BLOQ =   145;
  final int _PAUSE =  19;
  
  final int _A =      65;
  final int _B =      66;
  final int _C =      67;
  final int _D =      68;
  final int _E =      69;
  final int _F =      70;
  final int _G =      71;
  final int _H =      72;
  final int _I =      73;
  final int _J =      74;
  final int _K =      75;
  final int _L =      76;
  final int _M =      77;
  final int _N =      78;
  final int _O =      79;
  final int _P =      80;
  final int _Q =      81;
  final int _R =      82;
  final int _S =      83;
  final int _T =      84;
  final int _U =      85;
  final int _V =      86;
  final int _W =      87;
  final int _X =      88;
  final int _Y =      89;
  final int _Z =      90;
  
  final int _a =      65 + 32;
  final int _b =      66 + 32;
  final int _c =      67 + 32;
  final int _d =      68 + 32;
  final int _e =      69 + 32;
  final int _f =      70 + 32;
  final int _g =      71 + 32;
  final int _h =      72 + 32;
  final int _i =      73 + 32;
  final int _j =      74 + 32;
  final int _k =      75 + 32;
  final int _l =      76 + 32;
  final int _m =      77 + 32;
  final int _n =      78 + 32;
  final int _o =      79 + 32;
  final int _p =      80 + 32;
  final int _q =      81 + 32;
  final int _r =      82 + 32;
  final int _s =      83 + 32;
  final int _t =      84 + 32;
  final int _u =      85 + 32;
  final int _v =      86 + 32;
  final int _w =      87 + 32;
  final int _x =      88 + 32;
  final int _y =      89 + 32;
  final int _z =      90 + 32;
  
  boolean[] keys = new boolean[256];
  //.............................................................................................................................................................
  void keyPressed() {
    if(key == CODED) {
      //println("KEY CODED PRESSED:  " + keyCode);
      keys[keyCode] = true;
    }
    if (key<256) {
      keys[key] = true; 
       //println(keyCode + "  " + key);
    }
  }
  //.............................................................................................................................................................
  void keyReleased() {
    // esta llamada controla la entrada de texto por teclado..
    // el codigo esta en el mod_keyboard...
    //keyboardCore();
    //.............
    if(key == CODED) {
      //println("KEY CODED RELEASED:  " + keyCode);
      keys[keyCode] = false;
    }
    if (key<256) {
      keys[key] = false;
    }
  }
  //.............................................................................................................................................................
  boolean key(int code) {
    return keys[code];
  }
  

  And now in your draw() main function add this:

  if(key(_ENTER)){
    exit();
  }
  
• erkosone

  February 2016

  This code is multikey capable ;)
• AmazingSuperDry

  February 2016

  All i wanted was if the user presses 4 x=4 sort of thing
• GoToLoop

  February 2016

  https://forum.Processing.org/two/discussion/comment/2555/#Comment_2555
• Chrisir

  February 2016 edited February 2016

  if (inputText != null && int(inputText) % 2 == 0) {
  
      println("even"); 
  
  }
  

  in a new function that you have to write named "checkInputText()"
• Chrisir

  February 2016 edited February 2016

  If you only want numbers 0..9 it's easy: you can say inputText = key;

  For numbers 10...9999 or so:

  inputText = inputText + key;
  
  if(key==RETURN || key==ENTER) {
  
      checkInputText();
  
  }