A total of two classes, one is to describe the three-dimensional point type, and the other is to describe the method of calculating the distance and angle by latitude and longitude

测试距离及方位\1.cpp
..............\1.dsp
..............\1.dsw
..............\1.ncb
..............\1.opt
..............\1.plg
..............\CJWD.h
..............\CJWD.h.bak
..............\Debug
测试距离及方位

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