计算变量

Question

我正在构建一个跑步计算器，它要求运行距离，然后是时间。我设置了一个变量来按时间划分距离，并希望将其打印到屏幕上：

puts "Pace Calculator"

puts "What is the distance in KM?"
distance = gets

puts "What is the time in minutes?"
time = gets

#this is where the error occurs, how do I do a calculation in a variable?
pace = "#{distance}/#{time}"

puts "Your pace is #{pace}" 

但它似乎没有正常工作。如何设置变量进行计算？

Answer 1

您应该将您遇到错误的行更改为：

pace = distance.to_f / time.to_f

您目前正在尝试在字符串中执行此操作，这似乎没有多大意义。 to_f将字符串（从输入）转换为浮点数。

Answer 2

你可以做这样的事情

puts "Pace Calculator"

puts "What is the distance in KM?"
distance = gets

puts "What is the time in minutes?"
time = gets


#this is where the error occurs, how do I do a calculation in a variable?
puts "#{distance}/#{time}"

pace = distance.to_f / time.to_f

puts "Your pace is #{pace}"