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View Compilation Error

23799_0_12246.cpp: In member function `double Point::ppLen(Point)':
23799_0_12246.cpp:45: error: call of overloaded `abs(double)' is ambiguous
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/stdlib.h:365: note: candidates are: int abs(int)
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/cstdlib:153: note:                 long long int __gnu_cxx::abs(long long int)
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/cstdlib:123: note:                 long int std::abs(long int)
23799_0_12246.cpp:47: error: call of overloaded `abs(double)' is ambiguous
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/stdlib.h:365: note: candidates are: int abs(int)
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/cstdlib:153: note:                 long long int __gnu_cxx::abs(long long int)
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/cstdlib:123: note:                 long int std::abs(long int)
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