C/C : ld: error: duplicate symbol:

C/C : ld: error: duplicate symbol:
感觉是#include问题,在.hpp文件里声明函数,android studio new了一个.cpp文件,#include 了.hpp文件,写了function body,still problems.information:not include in project,sysc now,still problems.add .cpp in cmakelists.txt after other .cpps by hand,OK.nothing other than handwritting.

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