C + + class template notes

Today, I write a list class template, and then I write the same class as usual, the header file. h and. CPP are written separately, and then the compiler always prompts the class function is all unresolved external commands, followed by looking for information, originally because:
Template definitions are special.
Anything handled by template<...> means that the compiler does not allocate storage space for it at the time, and it waits until it is told by a template instance. At one point in the compiler and connector, there is a mechanism to remove multiple definitions of the specified template. So for ease of use, almost always place all template declarations and definitions in the header file.

C + + class template notes