golang-exercises/golangr/file-reader/main.go

package main

import (
	"bufio"
	"fmt"
	"math/rand"
	"os"
	//"strconv"
)

var names = []string{}
var err error
var guess string

func main() {
	if len(os.Args) < 2 || len(os.Args) > 2 {
		fmt.Println("Usage: ./file-reader names.txt")
		os.Exit(1)
	}

	filePath := os.Args[1]
	randWord := getWord(filePath)

	fmt.Printf("The chosen name is %v\n", randWord)
	fmt.Scan(&guess)

	if guess == randWord {
		fmt.Printf("You win!\n")
	} else {
		fmt.Printf("You lose!\n")
	}

}

func catchErr(err error) {
	if err != nil {
		fmt.Println(err)
		os.Exit(2)
	}
}

func getWord(path string) (word string) {

	file, err := os.Open(path)
	if err != nil {
		fmt.Println(err)
		os.Exit(2)
	}
	defer file.Close()

	scanner := bufio.NewScanner(file)

	for scanner.Scan() {
		names = append(names, scanner.Text())
	}

	randName := names[rand.Intn(len(names)-0)]
	return randName
}