极值问题\JCPLX.C ........\JCPLX0.C ........\JCPLX0.DAT ........\JJSIM.C ........\JJSIM0.C ........\JJSIM0.DAT ........\JLPLQ.C ........\JLPLQ0.C ........\JLPLQ0.DAT ........\JMAX1.C ........\JMAX10.C ........\JMAX10.DAT ........\JMAXN.C ........\JMAXN0.C ........\JMAXN0.DAT 极值问题