写最好的代码

最好的代码是什么样的代码?有人说是最短的,有人说是效率最高的.你问我?还是用事实来说话好一点.

事实一:Bjarne Stroustrup(Creator and implementor of C++ Language)先生的语录:

Remember, a primary aim of writing code is to make its meaning clear to the next person reading it – and that
person just might be yourself a few years hence.

事实二:sgi stl代码:

下面是关于partition这个函数的实现:


template <class BidirectionalIterator, class Predicate>


BidirectionalIterator partition(BidirectionalIterator first,




BidirectionalIterator last, Predicate pred) ...{




while (true) ...{


while (true)


if (first == last)


return first;


else if (pred(*first))


++first;


else


break;


--last;


while (true)


if (first == last)


return first;


else if (!pred(*last))


--last;


else


break;


iter_swap(first, last);


++first;


}


}

以下是我写的一个版本:




int partition(int* arr, int len) ...{


int front, back;


front = 0;


back = len - 1;


int pivot = arr[(int)(double(rand()) / RAND_MAX)*5];




while ( front < back ) ...{


while ( arr[front] < pivot )


++ front;


while ( arr[back] > pivot )


-- back;


if ( arr[front] != arr[back] )


swap ( arr[front], arr[back] );




else ...{


++ front;


-- back;


}


}




return back;


}

你觉得那个好了?可能你会毫不思索的说“sgi stl is best!”,我不知道你是不是权威的压迫下说出这样的话,如果没有,那我的恭喜你的鉴赏力.

我在这里不断的警告我自己,能让人看懂的代码才是最好的代码.这才是我们写代码的目的.其他都是形式主义的玩弄者.