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View Compilation Error

0_0_4025588_28485.cpp: In function `bool isvalid(int)':
0_0_4025588_28485.cpp:22: error: call of overloaded `abs(int)' is ambiguous
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/cmath:89: note: candidates are: double std::abs(double)
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/cmath:93: note:                 float std::abs(float)
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/cmath:97: note:                 long double std::abs(long double)
0_0_4025588_28485.cpp:22: error: call of overloaded `abs(int)' is ambiguous
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/cmath:89: note: candidates are: double std::abs(double)
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/cmath:93: note:                 float std::abs(float)
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/cmath:97: note:                 long double std::abs(long double)


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