0_0_9598973_31894.cpp: In function `int main()':
0_0_9598973_31894.cpp:48: error: `tan2' undeclared (first use this function)
0_0_9598973_31894.cpp:48: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9598973_31894.cpp:66: error: redeclaration of `double r'
0_0_9598973_31894.cpp:52: error: `double r' previously declared here
0_0_9598973_31894.cpp:67: error: `rx' undeclared (first use this function)
0_0_9598973_31894.cpp:67: error: `mid' undeclared (first use this function)
0_0_9598973_31894.cpp:82: error: redeclaration of `double r'
0_0_9598973_31894.cpp:52: error: `double r' previously declared here
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