From 0076a65a95281a7d25c7f25c2671fd19d83dc3ea Mon Sep 17 00:00:00 2001
From: Sklan <Sklan@users.noreply.github.com>
Date: Tue, 30 Oct 2018 08:14:43 +0530
Subject: [PATCH 1/3] Create thomas.kt

---
 .../thomas_algorithm/code/kotlin/thomas.kt    | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 contents/thomas_algorithm/code/kotlin/thomas.kt

diff --git a/contents/thomas_algorithm/code/kotlin/thomas.kt b/contents/thomas_algorithm/code/kotlin/thomas.kt
new file mode 100644
index 000000000..e1ca741c2
--- /dev/null
+++ b/contents/thomas_algorithm/code/kotlin/thomas.kt
@@ -0,0 +1,34 @@
+private fun thomas(a: DoubleArray, b: DoubleArray, c: DoubleArray, d: DoubleArray): DoubleArray {
+    val cPrime = c.clone()
+    val x = d.clone()
+    val size = a.size
+    cPrime[0] /= b[0]
+    x[0] /= b[0]
+    for (i in 1 until size) {
+        val scale = 1.0 / (b[i] - cPrime[i - 1] * a[i])
+        cPrime[i] *= scale
+        x[i] = (x[i] - a[i] * x[i - 1]) * scale
+    }
+    for (i in (size - 2) downTo 0) {
+        x[i] -= cPrime[i] * x[i + 1]
+    }
+    return x
+}
+
+fun main(args: Array<String>) {
+    val a = doubleArrayOf(0.0, 2.0, 3.0)
+    val b = doubleArrayOf(1.0, 3.0, 6.0)
+    val c = doubleArrayOf(4.0, 5.0, 0.0)
+    val x = doubleArrayOf(7.0, 5.0, 3.0)
+    val solution = thomas(a, b, c, x)
+
+    System.out.format("The system,\n")
+    System.out.format("[%.1f, %.1f, %.1f][x] = [%.1f]\n", b[0], c[0], 0f, x[0])
+    System.out.format("[%.1f, %.1f, %.1f][y] = [%.1f]\n", a[1], b[1], c[1], x[1])
+    System.out.format("[%.1f, %.1f, %.1f][z] = [%.1f]\n", 0f, a[2], b[2], x[2])
+    System.out.format("has the solution:\n")
+
+    for (i in solution.indices) {
+        System.out.format("[% .5f]\n", solution[i])
+    }
+}

From b5d81091828757326668c343a878f99e6d809c54 Mon Sep 17 00:00:00 2001
From: Sklan <Sklan@users.noreply.github.com>
Date: Tue, 30 Oct 2018 08:16:46 +0530
Subject: [PATCH 2/3] Update thomas_algorithm.md

---
 contents/thomas_algorithm/thomas_algorithm.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/contents/thomas_algorithm/thomas_algorithm.md b/contents/thomas_algorithm/thomas_algorithm.md
index e7ed2c8ef..b1102336d 100644
--- a/contents/thomas_algorithm/thomas_algorithm.md
+++ b/contents/thomas_algorithm/thomas_algorithm.md
@@ -125,6 +125,8 @@ You will find this algorithm implemented [in this project](https://scratch.mit.e
 [import, lang:"lua"](code/lua/thomas.lua)
 {% sample lang="crystal" %}
 [import, lang:"crystal"](code/crystal/thomas.cr)
+{% sample lang="kotlin" %}
+[import, lang:"kotlin"](code/kotlin/thomas.kt)
 {% endmethod %}
 
 <script>

From 7eec8e88c45d626c9f7d545cab7f3a7c1ce54a9e Mon Sep 17 00:00:00 2001
From: Sklan <Sklan@users.noreply.github.com>
Date: Thu, 1 Nov 2018 10:22:50 +0530
Subject: [PATCH 3/3] Making requested changes

---
 contents/thomas_algorithm/code/kotlin/thomas.kt | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/contents/thomas_algorithm/code/kotlin/thomas.kt b/contents/thomas_algorithm/code/kotlin/thomas.kt
index e1ca741c2..51dbafdea 100644
--- a/contents/thomas_algorithm/code/kotlin/thomas.kt
+++ b/contents/thomas_algorithm/code/kotlin/thomas.kt
@@ -22,13 +22,12 @@ fun main(args: Array<String>) {
     val x = doubleArrayOf(7.0, 5.0, 3.0)
     val solution = thomas(a, b, c, x)
 
-    System.out.format("The system,\n")
-    System.out.format("[%.1f, %.1f, %.1f][x] = [%.1f]\n", b[0], c[0], 0f, x[0])
-    System.out.format("[%.1f, %.1f, %.1f][y] = [%.1f]\n", a[1], b[1], c[1], x[1])
-    System.out.format("[%.1f, %.1f, %.1f][z] = [%.1f]\n", 0f, a[2], b[2], x[2])
-    System.out.format("has the solution:\n")
-
+    println("System:")
+    println("[%.1f, %.1f, %.1f][x] = [%.1f]".format(b[0], c[0], 0f, x[0]))
+    println("[%.1f, %.1f, %.1f][y] = [%.1f]".format(a[1], b[1], c[1], x[1]))
+    println("[%.1f, %.1f, %.1f][z] = [%.1f]\n".format(0f, a[2], b[2], x[2]))
+    println("Solution:")
     for (i in solution.indices) {
-        System.out.format("[% .5f]\n", solution[i])
+        println("[% .5f]".format(solution[i]))
     }
 }