例3_2 .....\chap3_2.cpp .....\chap3_2.dsp .....\chap3_2.dsw .....\chap3_2.ncb .....\chap3_2.opt .....\chap3_2.plg .....\Debug .....\.....\chap3_2.obj .....\.....\chap3_2.pdb .....\.....\vc60.pdb