Added go for Bagels

00_Alternate_Languages/05_Bagels/go/main.go

@@ -0,0 +1,166 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"math/rand"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const MAXGUESSES int = 20
+
+func printWelcome() {
+	fmt.Println("\n                Bagels")
+	fmt.Println("Creative Computing  Morristown, New Jersey")
+	fmt.Println()
+}
+func printRules() {
+	fmt.Println()
+	fmt.Println("I am thinking of a three-digit number.  Try to guess")
+	fmt.Println("my number and I will give you clues as follows:")
+	fmt.Println("   PICO   - One digit correct but in the wrong position")
+	fmt.Println("   FERMI  - One digit correct and in the right position")
+	fmt.Println("   BAGELS - No digits correct")
+}
+
+func getNumber() []string {
+	numbers := []string{"0", "1", "2", "3", "4", "5", "6", "7", "8", "9"}
+	rand.Shuffle(len(numbers), func(i, j int) { numbers[i], numbers[j] = numbers[j], numbers[i] })
+
+	return numbers[:3]
+}
+
+func getValidGuess(guessNumber int) string {
+	var guess string
+	scanner := bufio.NewScanner(os.Stdin)
+	valid := false
+	for !valid {
+		fmt.Printf("Guess # %d?\n", guessNumber)
+		scanner.Scan()
+		guess = strings.TrimSpace(scanner.Text())
+
+		// guess must be 3 characters
+		if len(guess) == 3 {
+			// and should be numeric
+			_, err := strconv.Atoi(guess)
+			if err != nil {
+				fmt.Println("What?")
+			} else {
+				// and the numbers should be unique
+				if (guess[0:1] != guess[1:2]) && (guess[0:1] != guess[2:3]) && (guess[1:2] != guess[2:3]) {
+					valid = true
+				} else {
+					fmt.Println("Oh, I forgot to tell you that the number I have in mind")
+					fmt.Println("has no two digits the same.")
+				}
+			}
+		} else {
+			fmt.Println("Try guessing a three-digit number.")
+		}
+	}
+
+	return guess
+}
+
+func buildResultString(num []string, guess string) string {
+	result := ""
+
+	// correct digits in wrong place
+	for i := 0; i < 2; i++ {
+		if num[i] == guess[i+1:i+2] {
+			result += "PICO "
+		}
+		if num[i+1] == guess[i:i+1] {
+			result += "PICO "
+		}
+	}
+	if num[0] == guess[2:3] {
+		result += "PICO "
+	}
+	if num[2] == guess[0:1] {
+		result += "PICO "
+	}
+
+	// correct digits in right place
+	for i := 0; i < 3; i++ {
+		if num[i] == guess[i:i+1] {
+			result += "FERMI "
+		}
+	}
+
+	// nothing right?
+	if result == "" {
+		result = "BAGELS"
+	}
+
+	return result
+}
+
+func main() {
+	rand.Seed(time.Now().UnixNano())
+	scanner := bufio.NewScanner(os.Stdin)
+
+	printWelcome()
+
+	fmt.Println("Would you like the rules (Yes or No)? ")
+	scanner.Scan()
+	response := scanner.Text()
+	if len(response) > 0 {
+		if strings.ToUpper(response[0:1]) != "N" {
+			printRules()
+		}
+	} else {
+		printRules()
+	}
+
+	gamesWon := 0
+	stillRunning := true
+
+	for stillRunning {
+		num := getNumber()
+		numStr := strings.Join(num, "")
+		guesses := 1
+
+		fmt.Println("\nO.K.  I have a number in mind.")
+		guessing := true
+		for guessing {
+			guess := getValidGuess(guesses)
+
+			if guess == numStr {
+				fmt.Println("You got it!!")
+				gamesWon++
+				guessing = false
+			} else {
+				fmt.Println(buildResultString(num, guess))
+				guesses++
+				if guesses > MAXGUESSES {
+					fmt.Println("Oh well")
+					fmt.Printf("That's %d guesses. My number was %s\n", MAXGUESSES, numStr)
+					guessing = false
+				}
+			}
+		}
+
+		validRespone := false
+		for !validRespone {
+			fmt.Println("Play again (Yes or No)?")
+			scanner.Scan()
+			response := scanner.Text()
+			if len(response) > 0 {
+				validRespone = true
+				if strings.ToUpper(response[0:1]) != "Y" {
+					stillRunning = false
+				}
+			}
+		}
+	}
+
+	if gamesWon > 0 {
+		fmt.Printf("\nA %d point Bagels buff!!\n", gamesWon)
+	}
+
+	fmt.Println("Hope you had fun.  Bye")
+}