什么时候 do-while 循环比 while 循环更好? [英] When would a do-while loop be the better than a while-loop?

问题描述

这是一个非常主观的问题，所以我会更具体.有没有什么时候 do-while 循环会比普通的 while 循环更好的编码风格?

This is a highly subjective question, so I'll be more specific. Is there any time that a do-while loop would be a better style of coding than a normal while-loop?

例如

int count = 0;
do {
   System.out.println("Welcome to Java");
   count++;
} while (count < 10);`

在评估 do 语句后检查 while 条件似乎没有意义(也就是强制 do 语句至少运行一次).

It doesn't seem to make sense to me to check the while condition after evaluating the do-statement (aka forcing the do statement to run at least once).

对于像我上面的例子这样简单的事情，我会想象:

For something simple like my above example, I would imagine that:

int count = 0; 
while(count < 10) { 
   System.out.println("Welcome to Java"); count++;
}

通常会被认为是用更好的写作风格写的.

would be generally considered to have been written in a better writing style.

谁能为我提供一个工作示例，说明何时将 do-while 循环视为唯一/最佳选择?你的代码中有 do-while 循环吗?它扮演什么角色，为什么选择 do-while 循环?

Can anyone provide me a working example of when a do-while loop would be considered the only/best option? Do you have a do-while loop in your code? What role does it play and why did you opt for the do-while loop?

(我有一种预感，do-while 循环可能在游戏编码中有用.如果我错了，请纠正我，游戏开发者！)

(I've got an inkling feeling that the do-while loop may be of use in coding games. Correct me, game developers, if I am wrong!)

推荐答案

如果要从网络套接字读取数据直到找到字符序列，首先需要读取数据，然后检查数据是否有转义序列.

If you want to read data from a network socket until a character sequence is found, you first need to read the data and then check the data for the escape sequence.

do
{ 
   // read data
} while ( /* data is not escape sequence */ );

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