Selasa, 29 Juni 2010

dikjstra

<html>
<head>
<title>Dijkstra Algorithms</title>
</head>
<body>
<script language = "javascript">
<!--
var nilaiacuan = 10000;
var takterdefinisi = -1;
var namaverteks = new Array("A","B","C","D","E","F");
var matriks = new Array(6);

function bobot(a,b)
{
return matriks[a][b];
}

function dijkstra(jumlahverteks,awal,d)
{
var posisi = new Array(jumlahverteks);
var i;
var kunjungan = new Array(jumlahverteks);
var sebelum = new Array(jumlahverteks);
for(i=0;i<jumlahverteks;i++)
{
posisi[i] = nilaiacuan;
sebelum[i] = takterdefinisi;
kunjungan[i] = false;
}
posisi[awal]=0;
var verteks;
for(verteks=0;verteks<jumlahverteks;verteks++)
{
var jarakterpendek = nilaiacuan,
berhenti = -1;
for(i=0;i<jumlahverteks;i++)
{
if(!kunjungan[i])
{
if(posisi[i] <= jarakterpendek)
{
jarakterpendek = posisi[i];
berhenti = i;
}
}
}
kunjungan[berhenti] = true;
for(i=0;i<jumlahverteks;i++)
{
if(!kunjungan[i])
{
var w = bobot(berhenti,i);
if(posisi[berhenti]+w < posisi[i])
{
posisi[i] = posisi[berhenti] + w;
sebelum[i] = berhenti;
}
}
}
}
i=d;
if(posisi[i] < nilaiacuan)
{
var lintasan = namaverteks[i];
var verteks = i;
while(verteks>0)
{
verteks = sebelum[verteks];
if(verteks>=0)
lintasan = namaverteks[verteks] + '->' + lintasan;
}
alert("Jarak : "+posisi[i]+' ('+lintasan+')'+'<br>');
}
else
{
alert("Tidak ada jalur");
}
}

function init()
{
var x = nilaiacuan;
document.write('<pre>');
document.write('<br>');
document.write(matriks[0] = new Array(0,2,3,x,x,x));
document.write('<br>');
document.write(matriks[1] = new Array(2,0,3,6,x,x));
document.write('<br>');
document.write(matriks[2] = new Array(3,3,0,3,5,x));
document.write('<br>');
document.write(matriks[3] = new Array(x,6,3,0,1,3));
document.write('<br>');
document.write(matriks[4] = new Array(x,x,5,1,0,1));
document.write('<br>');
document.write(matriks[5] = new Array(x,x,x,3,1,0));
document.write('<br>');
document.write('</pre>');

var awal='<pre>';
document.write(awal+'A--2-B--6--D--3-F'+'<br>');
document.write(' \\ | / | / '+'<br>');
document.write(' 3 3 3 1 1 '+'<br>');
document.write(' \\ | / | / '+'<br>');
document.write(' \\|/ |/'+'<br>');
document.write(' C--5--E'+'<br>');
document.write('</pre>');
}

init();
var dari=0;
var ke=5;
dijkstra(matriks.length,dari,ke);

//-->
</script>
</body>
</html>

Hasilnya :

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Kamis, 25 Februari 2010

Latihan Struktur Data

Latihan 1 :
<HTML>
<HEAD>
<TITLE>Type Bilangan</TITLE>
</HEAD>
<BODY>
<SCRIPT LANGUAGE = "JavaScript">
<!--

var a = 15;
b = 14;

tambah = a + b;
kali = a * b;

document.write("Penambahan (" +a+ " + " +b+ ") = " + tambah);
document.write("<BR>");
document.write("Perkalian (" +a+ " x " +b+ ") = " + kali);
document.write("<BR>");

//-->
</SCRIPT>
</BODY>
</HTML>


Latihan 2 :
<HTML>
<HEAD>
<TITLE>Konversi Antar Sistem Bilangan</TITLE>
</HEAD>
<BODY>
<SCRIPT LANGUAGE = "JavaScript">
<!--

var bil = new Number(25);
document.write("Bilangan Desimal: " +bil + "<BR>");
document.write("<HR>");

document.write("Biner : " + bil.toString(2) + "<BR>");
document.write("Oktal : " + bil.toString(8) + "<BR>");
document.write("Heksa : " + bil.toString(16) +"<BR>");

//-->
</SCRIPT>
</BODY>
</HTML>


Latihan 3 :
<HTML>
<HEAD>
<TITLE>Membuat Fungsi Matematika Dengan JAvaScript</TITLE>
</HEAD>
<BODY>
<SCRIPT LANGUAGE = "JavaScript">
<!--

function jumlah(x, y) {
var hasil = x + y;

return(hasil);
}

var a = parseInt(prompt("Ketikan Bilangan A = \n Ingat Jangan String"));
var b = parseInt(prompt("Ketikan Bilangan B = \n Ingat Jangan String"));
var z = jumlah(a,b);

document.write(z);
document.write("<BR>");
document.write("<hr>");
document.write("Tipe Data nya adalah = " + typeof(z));

//-->
</SCRIPT>
</BODY>
</HTML>




Latihan 4 :
<html>

<head>

<title>Persamaan kuadrat</title>

</head>

<body>

<script language="JavaScript">

<!--

function determinant(a,b,c)

{

var d = (b*b)-(4*a*c);

return(d);

}



var a=parseFloat(prompt("Menghitung akar persamaan kuadrat masukan nilai A =\n"));

var b=parseFloat(prompt("Menghitung akar persamaan kuadrat masukan nilai B =\n"));

var c=parseFloat(prompt("Menghitung akat persamaan kuadrat masukan nilai C =\n"));



var det=determinant(a,b,c);

document.write("Nilai Determinannya = " +det+"<BR>");

document.write("<BR>");

document.write("<HR>");



if (det>0)

{

var x1 = (-b - Math.sqrt(det))/(2*a);

var x2 = (-b + Math.sqrt(det))/(2*a);



document.write("Nilai x1 = " +x1+ "<BR>");

document.write("Nilai x2 = " +x2+ "<BR>");

document.write("<BR>");

document.write("<HR>");

document.write("Akar-akarnya beda");

alert("Nilai akar-akarnya ada dan berbeda");

} else



if (det==0)

{

var x1 = (-b - Math.sqrt(det))/(2*a);

var x2 = (-b + Math.sqrt(det))/(2*a);



document.write("Nilai x1 = " +x1+ "<BR>");

document.write("Nilai x2 = " +x2+ "<BR>");

document.write("<BR>");

document.write("<HR>");

document.write("Akar-akarnya kembar");

alert("Nilai akar-akarnya sama");

} else

if (det<0)



{

document.write("Akar-akarnya tidak real");

alert("Nilai akar-akarnya tidak terdefinisi");

}



//-->

</script>

</body>

</html>






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