漂亮的音乐播放器 A Nice Music Player by Qt5 and C++
一个Qt开发的抽奖程序，可用于年会抽奖。附件中有win32的完整可执行包。
基于Qt的GUI库开发的地理信息模块，处理了180度经线的问题，提供：矩形、圆形、多边形、线段、折线、扇形、扇环类。提供了日出日落计算时间等方法。
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