如何声明一个引用并稍后初始化

问题描述

我是C ++的新手，这里是我的情况。我有一个引用 MyOjbect ，但确切的对象取决于一个条件。所以我想做这样的事情：

I am very new to C++ and here's my situation. I have a reference to MyOjbect, but the the exact object depends on a condition. So I want to do something like this:

MyObject& ref;
if([condition])
  ref = MyObject([something])
else
  ref = MyObject([something else]);

现在我不能这样做，因为编译器不允许我声明但不初始化引用。我可以做些什么来实现我的目标？

I cannot do this right now because the compiler does not allow me to declare but not initialize a reference. What can I do to achieve my goal here?

推荐答案

你需要initliaze。但是如果你想有条件地初始化它，你可以这样做：

You need to initliaze it. But if you would like to conditionally initialize it, you can do something like this:

MyObject& ref = (condition) ? MyObject([something]) : MyObject([something else]);

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