循环半控制 [英] loop and a half controlled

问题描述

我们什么时候使用循环半?另外，是否应该有人简要说明如何编写其代码?

When do we use loop and a half? Also, should someone briefly elaborate how to write its code?

推荐答案

您使用循环半来避免从循环外部到内部重复代码.示例:

You use loop-and-a-half to avoid repeating code from outside the loop to the inside. Example:

read a;
while a != b do
  stuff;
  read a;
end

变成

while true do
  read a
  if a == b then break
  stuff;
end

现在我只能在一个地方阅读.

Now I only have the read in one place.

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