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引用模板类时，出现下面错误

error LNK2019: unresolved external symbol “public: __thiscall CImageSegment<short>::CImageSegment<short>(void)” (??0?$CImageSegment@F@@QAE@XZ) referenced in function “public: void __thiscall CSegmentImgTestDlg::OnBnClickedButtonSeg(void)” (?OnBnClickedButtonSeg@CSegmentImgTestDlg@@QAEXXZ)

1>K:\myProgram\testFile\SegmentImgTest\Debug\SegmentImgTest.exe : fatal error LNK1120: 1 unresolved externals。