c - 如何返回 true 或 false 的相反值？

Question

我在公司面试，被问到一个问题，问题有点奇怪，所以想请教专家。

问题假设我有返回 bool 类型的函数。让我们这样说:

public bool func(int param)
{
  bool retVal;

 // here is some algorithm which as a result either set the retVal to false or true, 
 // It doesn't matter what is algo, the only thing important is it either do 
 // retVal=false or retVal=true

 // The question is i have to write the algo here which in case 
 // if the previous algo gives us retVal=false then it should 
 // return true and if retVal=true then return false      

}

该算法应该是什么？

Answer 1

我认为你的代码会是这样的:

public bool func(int param)
{
   bool retVal;
   return !retVal;
}