marți, 20 aprilie 2021

functii javascript ecuatie de gradul 1 si afisare data

08:22 catactro1 No comments

Salutare!

Incerc sa rezolv prin intermediul unei functii javascript o ecuatie de gradul 1

<html>
<head>
<script type="text/javascript">
function rezolvare()
{
// convertire coeficienti
var A = parseFloat(document.getElementById('A').value);
document.getElementById('A').value=A;
var B = parseFloat(document.getElementById('B').value);
document.getElementById('B').value=B;
var C = parseFloat(document.getElemntById('C').value);
document.getElementById('C').value=C;

var X = C - B / A;
document.getElementById('X').value = X;

}

</script>
</head>
<body>
<input type="text" id="A"/> X + <input type="text" id="B"/> = <input type="text" id="C"/>
<br/><br/>
<button onclick="rezolvare()">Rezolvare</button> X = <input type="text" id="X" readonly="readonly"/>
</body>
</html>

In primul rand ar trebui sa stii sa rezolvi o ecuatie de gradul I inainte sa faci un script.
Formula aia nu rezolva in veci ecuatia.
In al doilea, asta nu am inteles-o:

<html>
<head>
   <script type="text/javascript">
      function rezolvare()
      {
         // convertire coeficienti
         var A = parseFloat(document.getElementById('A').value);
         var B = parseFloat(document.getElementById('B').value);
         var C = parseFloat(document.getElementById('C').value);

         var X = (C - B) / A;

         document.getElementById('X').value = X;
      }
   </script>
</head>
<body>
   <input type="text" id="A"/> X + <input type="text" id="B"/> = <input type="text" id="C"/>
   <br/><br/>
   <button onclick="rezolvare()">Rezolvare</button> X = <input type="text" id="X" readonly="readonly"/>
</body>
</html>

====================================================================================

<html>
<head>
   <title>Data</title>
   <script type="text/javascript">

      function vftimp(i){
         if(i<10){
         i = "0"+i;
         }
         return i

      }

      function timp(){

         var luni = new Array("Ianuarie" , "Februarie", "Martie" , "Aprilie", "Mai", "Iunie", "Iulie", "August", "Septembrie" , "Octombrie" , "Noiembrie" , "Decembrie");
         var zile = new Array("Duminica", "Luni", "Marti", "Miercuri" , "Joi" , "Vineri" , "Sambata");
         var anual = new Date();

         var y = anual.getFullYear();
         var m = anual.getMonth();
         var d = anual.getDate();
         var z = anual.getDay();
         var h = anual.getHours();
         var mi = anual.getMinutes();
         var s = anual.getSeconds();


         // punem acel 0 in fata lunilor sau zilelor < 10
         m = luni[m];
         d = vftimp(d);
         h = vftimp(h);
         mi = vftimp(mi);
         s = vftimp(s);
         z = zile[z];

         document.getElementById('div1').innerHTML = z + ", " + d + " " + m + " " + y + ", " + h + " : "+ mi + " : " + s ;

      }

   </script>
</head>

<body onload="setInterval('timp()', 500);">
   <div id="div1"></div>
</body>

</html>

http://www.phpromania.net/forum/viewtopic.php?t=23351

https://github.com/google/mathsteps/issues/243