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Kalkulačka-determináty
Normální položka
Zobrazeno: 6419

Popis: Velmi rychle spočítá determináty.
Funkčnost: IE 5.5 a vyššie, Mozzila Firefox, Opera
Hodnocení: ****
Následující kód si vložte mezi tagy <BODY> a </BODY>

<script language="javascript" src="js0005.js"></script>

<form name="form1" style="background-color:#000000; color:#0000FF; width: 295px; height: 250px;">
        <br>
          <input type="text" value="1" style=" width: 30px; text-align:right" name="fx1" maxlength="3">X +  
        <input type="text" value="1" style=" width: 30px; text-align:right" name="fy1" maxlength="3">Y +  
        <input type="text" value="1" style=" width: 30px; text-align:right" name="fz1" maxlength="3">Z =  
        <input type="text" value="0" style=" width: 30px; text-align:right" name="fv1" maxlength="3"><br>

          <input type="text" value="1" style=" width: 30px; text-align:right" name="fx2" maxlength="3">X +  
        <input type="text" value="1" style=" width: 30px; text-align:right" name="fy2" maxlength="3">Y +  
        <input type="text" value="1" style=" width: 30px; text-align:right" name="fz2" maxlength="3">Z =  
        <input type="text" value="0" style=" width: 30px; text-align:right" name="fv2" maxlength="3"><br>

          <input type="text" value="1" style=" width: 30px; text-align:right" name="fx3" maxlength="3">X +  
        <input type="text" value="1" style=" width: 30px; text-align:right" name="fy3" maxlength="3">Y +  
        <input type="text" value="1" style=" width: 30px; text-align:right" name="fz3" maxlength="3">Z =  
        <input type="text" value="0" style=" width: 30px; text-align:right" name="fv3" maxlength="3"><br> <br>
        
          X = <input type="text" readonly="true" name="resx" value="0" style=" width: 150px; text-align:left"><br>
          Y = <input type="text" readonly="true" name="resy" value="0" style=" width: 150px; text-align:left"><br>
          Z = <input type="text" readonly="true" name="resz" value="0" style=" width: 150px; text-align:left"><br>
        <br>
        
          <input type="button" value="Vypocitaj!" onClick="test()">
</form>

Následující kód si zkopírujte do textového souboru, kterému dejte příponu .js. A pojmenujte jej jako "js0005.js" (bez uvozovek). Soubor umístěte do stejného adresáře jako WWW.

// JavaScript Document
// Autor: Wiki
// Tested: IE 6
<!--

function test()
        {
                var x1 = document.all.form1.fx1.value;
                var x2 = document.all.form1.fx2.value;
                var x3 = document.all.form1.fx3.value;
                
                var y1 = document.all.form1.fy1.value;
                var y2 = document.all.form1.fy2.value;
                var y3 = document.all.form1.fy3.value;
                
                var z1 = document.all.form1.fz1.value;
                var z2 = document.all.form1.fz2.value;
                var z3 = document.all.form1.fz3.value;
                
                var v1 = document.all.form1.fv1.value;
                var v2 = document.all.form1.fv2.value;
                var v3 = document.all.form1.fv3.value;
                
                if(v1.length<1){v1 = 0; document.all.form1.fv1.value = v1;}
                if(v2.length<1){v2 = 0; document.all.form1.fv2.value = v2;}
                if(v3.length<1){v3 = 0; document.all.form1.fv3.value = v3;}
                
                if(x1 == 0|| x2 == 0|| x3 == 0|| y1 == 0|| y2 == 0|| y3 == 0|| z1 == 0|| z1 == 0|| z2 == 0|| z3 == 0) {alert("Vsetky hodnoty x,y,z musia byt zadate a rozne od nuly");}
                else 
                        {
                                var kh = x1*y2*z3;        //Je tu pouzite velke mnozstvo premennych - len kvoli prehladnosti a spravnosti vzorcov
                                var k1 = x2*y3*z1;
                                var k2 = y1*z2*x3;
                                var zaph = x3*y2*z1;
                                var zap1 = x2*y1*z3;
                                var zap2 = y3*z2*x1;
                                var DS = kh+k1+k2-zaph-zap1-zap2;
                                
                                var kh = v1*y2*z3;
                                var k1 = v2*y3*z1;
                                var k2 = y1*z2*v3;
                                var zaph = v3*y2*z1;
                                var zap1 = v2*y1*z3;
                                var zap2 = y3*z2*v1;
                                var DX = kh+k1+k2-zaph-zap1-zap2;
                                
                                var kh = x1*v2*z3;
                                var k1 = x2*v3*z1;
                                var k2 = v1*z2*x3;
                                var zaph = x3*v2*z1;
                                var zap1 = x2*v1*z3;
                                var zap2 = v3*z2*x1;
                                var DY = kh+k1+k2-zaph-zap1-zap2;
                                
                                var kh = x1*y2*v3;
                                var k1 = x2*y3*v1;
                                var k2 = y1*v2*x3;
                                var zaph = x3*y2*v1;
                                var zap1 = x2*y1*v3;
                                var zap2 = y3*v2*x1;
                                var DZ = kh+k1+k2-zaph-zap1-zap2;
                                
                                if(DS==0)
                                        {
                                                if(DX == 0 && DY == 0 && DZ == 0)
                                                        {
                                                                alert("Rovnica ma nekonecne vela rieseni!");
                                                                document.all.form1.resx.value = "Existuje";
                                                                document.all.form1.resy.value = "nekonecne vela";
                                                                document.all.form1.resz.value = "rieseni!";
                                                        }
                                                else
                                                        {
                                                                alert("Rovnica nema riesenie!");
                                                                document.all.form1.resx.value = "Rovnica";
                                                                document.all.form1.resy.value = "nema";
                                                                document.all.form1.resz.value = "riesenie!";
                                                        }
                                        }
                                else
                                        {
                                                var X = DX/DS;
                                                var Y = DY/DS;
                                                var Z = DZ/DS;
                                                
                                                document.all.form1.resx.value = X;
                                                document.all.form1.resy.value = Y;
                                                document.all.form1.resz.value = Z;
                                        }
                        }
        }
        
-->