括号周围的返回值 [英] Parenthesis surrounding return values

问题描述

常常在ANSI C code，我可以看到括号sorrounding一个返回值。

Quite often in ANSI C code I can see parenthesis sorrounding a single return value.

像这样： -

int foo(int x) {
  if (x)
    return (-1);
  else
    return (0);
}

为什么要使用（）围绕在这些情况下返回值？有任何想法吗？我看不出有什么理由。

Why use () around the return value in those cases? Any ideas? I can see no reason for that.

推荐答案

有真的不是一个原因......它只是旧约定。

There really isn't a reason...it's just old convention.

为了节省空间，程序员经常会做最后的数学在返回行，而不是它自己的线路和括号确保大多是在那里更容易地看到，它是返回，这样一条语句：

To save space, programmers would often do the final math in the return line instead of on it's own line and the parens ensure are mostly there to make it easier to see that it is a single statement that is returned, like this:

return (x+i*2);

而不是

int y = x+i*2;
return y;

括号变成了习惯，把它卡住了。

The parenthesis became a habit and it stuck.

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