Data commit

Task/Knapsack-problem-Continuous/Kotlin/knapsack-problem-continuous.kotlin

@@ -0,0 +1,47 @@
+// version 1.1.2
+
+data class Item(val name: String, val weight: Double, val value: Double)
+
+val items = mutableListOf(
+    Item("beef", 3.8, 36.0),
+    Item("pork", 5.4, 43.0),
+    Item("ham", 3.6, 90.0),
+    Item("greaves", 2.4, 45.0),
+    Item("flitch", 4.0, 30.0),
+    Item("brawn", 2.5, 56.0),
+    Item("welt", 3.7, 67.0),
+    Item("salami", 3.0, 95.0),
+    Item("sausage", 5.9, 98.0)
+)
+
+const val MAX_WEIGHT = 15.0
+
+fun main(args: Array<String>) {
+    // sort items by value per unit weight in descending order
+    items.sortByDescending { it.value / it.weight }
+    println("Item Chosen   Weight  Value  Percentage")
+    println("-----------   ------ ------  ----------")
+    var w = MAX_WEIGHT
+    var itemCount = 0
+    var sumValue = 0.0
+    for (item in items) {
+        itemCount++
+        if (item.weight <= w) {
+           sumValue += item.value
+           print("${item.name.padEnd(11)}     ${"%3.1f".format(item.weight)}   ${"%5.2f".format(item.value)}")
+           println("    100.00")
+        }
+        else {
+           val value  = Math.round((w / item.weight * item.value * 100.0)) / 100.0
+           val percentage = Math.round((w / item.weight * 10000.0)) / 100.0
+           sumValue += value
+           print("${item.name.padEnd(11)}     ${"%3.1f".format(w)}   ${"%5.2f".format(value)}")
+           println("     $percentage")
+           break
+        }
+        w -= item.weight
+        if (w == 0.0) break
+    }
+    println("-----------   ------ ------")
+    println("${itemCount} items        15.0  ${"%6.2f".format(sumValue)}")
+}