使用三元运算符初始化参考变量？ [英] Using ternary operator to initialize a reference variable?

问题描述

将所有可维护性和读取问题搁置一旁，这些代码行是否会生成未定义的行为？

Putting all the maintainability and reading issues aside, can these lines of code generate undefined behavior?

float  a = 0, b = 0;
float& x = some_condition()? a : b;
x = 5;
cout << a << ", " << b;

推荐答案

不，它不会在此代码中创建未定义的行为。您将根据条件将a或b的值更改为5。

No, it's just fine. It would not create undefined behavior in this code. You will just change value of a or b to 5, according to condition.

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