Data commit

Task/21-game/Go/21-game.go

@@ -0,0 +1,100 @@
+package main
+
+import (
+    "bufio"
+    "fmt"
+    "log"
+    "math/rand"
+    "os"
+    "strconv"
+    "time"
+)
+
+var scanner = bufio.NewScanner(os.Stdin)
+
+var (
+    total = 0
+    quit  = false
+)
+
+func itob(i int) bool {
+    if i == 0 {
+        return false
+    }
+    return true
+}
+
+func getChoice() {
+    for {
+        fmt.Print("Your choice 1 to 3 : ")
+        scanner.Scan()
+        if scerr := scanner.Err(); scerr != nil {
+            log.Fatalln(scerr, "when choosing number")
+        }
+        text := scanner.Text()
+        if text == "q" || text == "Q" {
+            quit = true
+            return
+        }
+        input, err := strconv.Atoi(text)
+        if err != nil {
+            fmt.Println("Invalid number, try again")
+            continue
+        }
+        newTotal := total + input
+        switch {
+        case input < 1 || input > 3:
+            fmt.Println("Out of range, try again")
+        case newTotal > 21:
+            fmt.Println("Too big, try again")
+        default:
+            total = newTotal
+            fmt.Println("Running total is now", total)
+            return
+        }
+    }
+}
+
+func main() {
+    rand.Seed(time.Now().UnixNano())
+    computer := itob(rand.Intn(2))
+    fmt.Println("Enter q to quit at any time\n")
+    if computer {
+        fmt.Println("The computer will choose first")
+    } else {
+        fmt.Println("You will choose first")
+    }
+    fmt.Println("\nRunning total is now 0\n")
+    var choice int
+    for round := 1; ; round++ {
+        fmt.Printf("ROUND %d:\n\n", round)
+        for i := 0; i < 2; i++ {
+            if computer {
+                if total < 18 {
+                    choice = 1 + rand.Intn(3)
+                } else {
+                    choice = 21 - total
+                }
+                total += choice
+                fmt.Println("The computer chooses", choice)
+                fmt.Println("Running total is now", total)
+                if total == 21 {
+                    fmt.Println("\nSo, commiserations, the computer has won!")
+                    return
+                }
+            } else {
+                getChoice()
+                if quit {
+                    fmt.Println("OK, quitting the game")
+                    return
+                }
+                if total == 21 {
+                    fmt.Println("\nSo, congratulations, you've won!")
+                    return
+                }
+            }
+            fmt.Println()
+            computer = !computer
+        }
+    }
+}