如果没有该特定行，我的代码将无法工作。为什么？
My code does not work without that specific line. Why?
puts "Enter the first number"
num1 = Float(gets)
puts "Enter the second number"
num2 = Float(gets)
puts "Enter the operation"
op = gets
op = op.chomp # <--- THIS LINE!
case op
when "+" then puts num1 + num2
when "-" then puts num1 - num2
when "*" then puts num1 * num2
when "/" then puts num1 / num2
end
输入“+”操作时，您按了两个键，+和return。两者都产生一个字符，结果是 "+\n"。 （即 \n 是换行符）
chomp 删除换行符。
puts "Enter the first number"
num1 = Float(gets)
puts "Enter the second number"
num2 = Float(gets)
puts "Enter the operation"
op = gets
op = op.chomp # <--- THIS LINE!
case op
when "+" then puts num1 + num2
when "-" then puts num1 - num2
when "*" then puts num1 * num2
when "/" then puts num1 / num2
end
输入“+”操作时，您按了两个键，+和return。两者都产生一个字符，结果是 "+\n"。 （即 \n 是换行符）
chomp 删除换行符。