例3_5 .....\chap3_5.cpp .....\chap3_5.dsp .....\chap3_5.dsw .....\chap3_5.ncb .....\chap3_5.opt .....\chap3_5.plg .....\Debug .....\.....\chap3_5.obj .....\.....\chap3_5.pdb .....\.....\vc60.pdb