Question

我正在制作软件，但我现在不想发布它的源代码，因为我不想让人们偷我的辛勤工作。我不粗鲁或类似的东西。以下是我正在制作的节目的示例。

print "Username : "
name = gets.chomp


print "Password : "
pass = gets.chomp

if name =="user" and pass=="pa$$word"
print "Hello"

else print "Error, incorrect details"

现在这是ruby中最简单的登录表单，但是这里发生的不好的事情是，只要用户插入错误的信息，程序就会关闭，我想要发生的是我想让程序向用户询问正确的信息，直到插入了正确的信息。

您是Windows用户吗？知道如何在批处理文件中编程吗？例子

echo Hello world CLS

暂停

所以这是ruby的代码

a. print "Command : "
b. command = gets.chomp

c. if command == "Hello"

d. print "Hi, how are you?"

e. elsif command == "help"

f. print "Say hi to me, chat with me"

现在我想要的就像第一个问题一样

详细信息：用户输入＆＃34;嗨＆＃34;该程序刚关闭，但我想在这里让程序要求再次排队

Answer 1

使用while循环不断请求输入并检查用户的提交，直到输入有效结果。

username = nil

while username.nil?
  puts "What is your username?"
  entered_username = gets.chomp

  if entered_username == "Bob"
    username = entered_username
  end
end

puts "Thanks!"

在终端上运行时会产生：

What is your username?
sdf
What is your username?
dsfsd
What is your username?
sdfsd
What is your username?
sdfds
What is your username?
sdf
What is your username?
Bob
Thanks!

Answer 2

1

until (print "Username : "; gets.chomp == "user") and
      (print "Password : "; gets.chomp == "pa$$word")
  puts "Error, incorrect details"
end
puts "Hello"

2

loop do
  print "Command : "
  case gets.chomp
  when "Hello" then print "Hi, how are you?"; break
  when "help" then print "Say hi to me, chat with me"; break
  end
end

Answer 3

这是一个简单的方法:)如果有人遇到我遇到的问题，你所做的就是这个。 “while”循环

number = 1          # Value we will give for a string named "number" 
while number < 10   # The program will create a loop until the value 
                    # of the string named "number" will be greater than 10

    puts "hello"

                    # So what we need to do now is to end the loop otherwise
                    # it will continue on forever
                    # So how do we do it? 
                    # We will make the ruby run a script that will increase
                    # the string named "number"'s value every time we run the loop

    number = number + 1
end                 # Now what happens is every time we run the code all the program
                    # will do is print "hello" and add number 1 to the string "number". 
                    # It will continue to print out "hello" until the string is
                    # greater than 10

我需要红宝石的帮助

3 个答案: