用mfc实现的站场图绘制，包含了信号机、道岔和轨道电路等线路元素。-Mfc achieve station field mapping that contains the elements of the signal, turnouts and track circuit line.

蒙特卡洛法求圆周率,在linux下用 g++ pi.cpp -o pi-lm 编译。-Monte Carlo method for pi, under linux with g++ pi.cpp-o pi-lm compiled.