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Classes With Static Data Members Are Getting Linker Errors ("undefined").? |
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Answer» This code is BUILT into Turbo C++ 1.0 but not in version 3.0. In the 1.0 compiler, static members without definitions were given a default value of 0. This default definition will no longer be made in the compiler. The programmer must now give an explicit definition for each static member. Here is a quick example: class A { static int i; }; A linker ERROR saying that A::i is not defined will RESULT UNLESS the SOURCE also contains a line such as: int A::i = 1; This code is built into Turbo C++ 1.0 but not in version 3.0. In the 1.0 compiler, static members without definitions were given a default value of 0. This default definition will no longer be made in the compiler. The programmer must now give an explicit definition for each static member. Here is a quick example: class A { static int i; }; A linker error saying that A::i is not defined will result unless the source also contains a line such as: int A::i = 1; |
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