Data commit

Task/Two-bullet-roulette/Go/two-bullet-roulette.go

@@ -0,0 +1,90 @@
+package main
+
+import (
+    "fmt"
+    "math/rand"
+    "strings"
+    "time"
+)
+
+var cylinder = [6]bool{}
+
+func rshift() {
+    t := cylinder[5]
+    for i := 4; i >= 0; i-- {
+        cylinder[i+1] = cylinder[i]
+    }
+    cylinder[0] = t
+}
+
+func unload() {
+    for i := 0; i < 6; i++ {
+        cylinder[i] = false
+    }
+}
+
+func load() {
+    for cylinder[0] {
+        rshift()
+    }
+    cylinder[0] = true
+    rshift()
+}
+
+func spin() {
+    var lim = 1 + rand.Intn(6)
+    for i := 1; i < lim; i++ {
+        rshift()
+    }
+}
+
+func fire() bool {
+    shot := cylinder[0]
+    rshift()
+    return shot
+}
+
+func method(s string) int {
+    unload()
+    for _, c := range s {
+        switch c {
+        case 'L':
+            load()
+        case 'S':
+            spin()
+        case 'F':
+            if fire() {
+                return 1
+            }
+        }
+    }
+    return 0
+}
+
+func mstring(s string) string {
+    var l []string
+    for _, c := range s {
+        switch c {
+        case 'L':
+            l = append(l, "load")
+        case 'S':
+            l = append(l, "spin")
+        case 'F':
+            l = append(l, "fire")
+        }
+    }
+    return strings.Join(l, ", ")
+}
+
+func main() {
+    rand.Seed(time.Now().UnixNano())
+    tests := 100000
+    for _, m := range []string{"LSLSFSF", "LSLSFF", "LLSFSF", "LLSFF"} {
+        sum := 0
+        for t := 1; t <= tests; t++ {
+            sum += method(m)
+        }
+        pc := float64(sum) * 100 / float64(tests)
+        fmt.Printf("%-40s produces %6.3f%% deaths.\n", mstring(m), pc)
+    }
+}