c++ - 使用模板时为 "error LNK2019: unresolved external symbol"

Question

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Answer 1

模板应该在标题中实现。

方法.h

template<typename type>
void Method(Model<type>* sys){ /*Your code here*/ };

另请参阅:https://stackoverflow.com/a/495056/868546

来自 Mark Ransom :

In the .cpp file, the compiler can't guess what the template parameter will be when you use the function in other files, so it doesn't generate any actual code. The linker notices the lack of code and complains.

The usual way is to define the entire function body in the header, much as an inline function, so the compiler can emit the code when it sees the function being used with the template parameter filled in.