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Thread: a simple game

  1. #1
    Join Date
    Nov 2013
    Posts
    44

    a simple game

    i have been trying to make a simple game.i have managed to code the way i want the game to be played.i think every one know what this game is asap you see the codes.but problem is i cant find how to declare winner .the way i want to do it is not working.please help
    HTML Code:
    <!doctype html>
    <html>
    <head>
    <meta charset="utf-8">
    <title>Untitled Document</title>
    <style>
    #shape{
    	border:1px solid black;
    	width:200px;
    	height:200px;
    }
    td{
    	border:1px solid black;
    }
    </style>
    
    </head>
    
    <body>
    <table id="shape">
    <tr >
    <td onClick="add(this.id,0,0);" id="td1"></td>
    <td onClick="add(this.id,0,1);" id="td2"></td>
    <td onClick="add(this.id,0,2);" id="td3" 3</td>
    </tr>
    <tr >
    <td onClick="add(this.id,1,0);" id="td4" ></td>
    <td onClick="add(this.id,1,1);" id="td5"></td>
    <td onClick="add(this.id,1,2);" id="td6"></td>
    </tr>
    <tr >
    <td onClick="add(this.id,2,0);" id="td7" ></td>
    <td onClick="add(this.id,2,1);" id="td8"></td>
    <td onClick="add(this.id,2,2);" id="td9"></td>
    </tr>
    </table>
    <script>
    
    var arr =new Array(3)
    for (i=0; i <3; i++){
    arr[i]=new Array(3)
    }
    </script>
    <script>
    var i=0;
    function add(el,r,c){
    	var m=document.getElementById(el);
    	i++;
    	if(i%2==1){
    		m.innerHTML="o";
    		arr[r][c]=m.innerHTML;
    		
    	}
    	if((arr[0][0]==arr[0][1]==arr[0][2]=="o") || (arr[0][0]==arr[1][0]==arr[2][0]=="o")){
    		alert("player 1 wins");
    		}
    	if(i%2==0){
    		m.innerHTML="x";
    		arr[r][c]=m.innerHTML;
    	}
    	
    }
    
    </script>
    </body>
    </html>

  2. #2
    Join Date
    Dec 2005
    Location
    TX
    Posts
    7,943

    Lightbulb

    A simple google search with 'javascript tic tac toe code'
    will render this solution: http://www.javascriptkit.com/script/...2/tactoe.shtml

    There are many other ways to skin this cat.

    Here is a modification to your code using only a single array.
    You can add the 'draw' logic easy enough.
    Code:
    <!doctype html>
    <html>
    <head>
    <meta charset="utf-8">
    <title>Tic-Tac-Toe Game</title>
    
    <style>
     th { border:1px solid black; height:75px; width:75px; font-size:2.5em; }
    </style>
    
    </head>
    
    <body>
    <table id="shape" border="1">
    <tr>
    <th onClick="setXO(0,0);" id="t0"></th>
    <th onClick="setXO(0,1);" id="t1"></th>
    <th onClick="setXO(0,2);" id="t2"></th>
    </tr>
    <tr>
    <th onClick="setXO(1,0);" id="t3"></th>
    <th onClick="setXO(1,1);" id="t4"></th>
    <th onClick="setXO(1,2);" id="t5"></th>
    </tr>
    <tr>
    <th onClick="setXO(2,0);" id="t6"></th>
    <th onClick="setXO(2,1);" id="t7"></th>
    <th onClick="setXO(2,2);" id="t8"></th>
    </tr>
    </table>
    <script>
    
    var arr = ['','','', '','','', '','',''];
    var player=0;
    
    function setXO(r,c){
      var el;
      player++;
      var p = r*3+c; 
      if (player % 2 == 1) { arr[p] = 'O'; } else { arr[p] = 'X'; }
      for (var p=0; p<9; p++) {
        el = 't'+p;  document.getElementById(el).innerHTML = arr[p];
      }
      if (checkWinner('O')) { alert('O wins'); };
      if (checkWinner('X')) { alert('X wins'); };
    }
    function checkWinner(XO) {
      var flag = false;
    // across
      if ( (arr[0] == XO) && (arr[0] == arr[1]) && (arr[1] == arr[2]) ) { flag = true; }
      if ( (arr[3] == XO) && (arr[3] == arr[4]) && (arr[4] == arr[5]) ) { flag = true; }
      if ( (arr[6] == XO) && (arr[6] == arr[7]) && (arr[7] == arr[8]) ) { flag = true; }
    // down
      if ( (arr[0] == XO) && (arr[0] == arr[3]) && (arr[3] == arr[6]) ) { flag = true; }
      if ( (arr[1] == XO) && (arr[1] == arr[4]) && (arr[4] == arr[7]) ) { flag = true; }
      if ( (arr[2] == XO) && (arr[2] == arr[5]) && (arr[5] == arr[8]) ) { flag = true; }
    // diagonal  
      if ( (arr[0] == XO) && (arr[0] == arr[4]) && (arr[4] == arr[8]) ) { flag = true; }
      if ( (arr[2] == XO) && (arr[2] == arr[4]) && (arr[4] == arr[6]) ) { flag = true; }
      return flag;
    }
    </script>
    </body>
    </html>
    Last edited by JMRKER; 12-06-2013 at 11:03 AM.

  3. #3
    Join Date
    Dec 2005
    Location
    TX
    Posts
    7,943
    Some additional considerations for your game:

    1. Stop user from clicking on already selected cell.

    2. Tell user when game is over is they continue to click cells.

    3. Stop game when a winner has been found.

    4. Restart game without browser 'refresh'.

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