Question

我正在制作一个可以计算加，减，乘和除的计算器：

puts "This is Calculator"
print "please enter the number 1"
a = gets.to_i
puts "please enter number 2"
b = gets.to_i
puts "please choose your operation"
c = gets

if c = add
  puts a+b
elsif c = sub
  puts a-b
elsif c = mul
  puts a*b
elsif c = div
  puts a/b
end

Answer 1

一些修复：

=用于分配，==用于比较
字符串需要使用beetwen引号
gets甚至会输入您输入的内容，因此在将其与add，sub，mul和div进行比较之前，我们先将其剔除

以这种方式似乎起作用：

puts "This is Calculator"
print "please enter the number 1"
a = gets.to_i
puts "please enter number 2"
b = gets.to_i
puts "please choose your operation"
c = gets.chomp

if c == "add"
  puts a+b
elsif c == "sub"
  puts a-b
elsif c == "mul"
  puts a*b
elsif c == "div"
  puts a/b
end

显然没有错误处理

Answer 2

puts "This is Calculator"
print "please enter the number 1 :- "
a = gets.to_i
puts "please enter number 2 :- "
b = gets.to_i
puts "please choose your operation (add / sub / mul / div) :- "
c = gets
if c == "add\n"
  puts a+b
elsif c == "sub\n"
  puts a-b
elsif c == "mul\n"
  puts a*b
elsif c == "div\n"
  puts a/b
end

这是您的解决方案，但您应该对其进行更多格式化，如果您想知道代码为何起作用，请发表评论。

我正在制作计算器，但无法正常工作

2 个答案: