undefined reference
常见例句
- Similar to an undefined external error, except that the reference is via metadata.
与未定义的外部错误类似，不同的是引用是通过元数据。 - They hold only one piece of data: a string, a number, the undefined value, a reference to another variable.
它只保存一段数据：一个字符串、一个数字、未定义的值以及对另一个变… - Note that had we declared the reference i without the const qualifier, the function f() could have modified its argument, thereby causing undefined behavior.
注意我们没有将i声明为静态类型，但是函数f仍有可能修改它的这个参数，这将引起异常。 - Undefined reference, what was the solution last time?
未定义的引用，上次我们是怎么解决的呢？
哈佛公开课 - 计算机科学课程节选 返回 undefined reference