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View Compilation Error

0_0_6896559_31957.cpp: In function `double closestpair(int, int)':
0_0_6896559_31957.cpp:65: error: `mid' undeclared (first use this function)
0_0_6896559_31957.cpp:65: error: (Each undeclared identifier is reported only once for each function it appears in.)
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_iterator_base_types.h: At global scope:
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_iterator_base_types.h: In instantiation of `std::iterator_traits<int>':
0_0_6896559_31957.cpp:83:   instantiated from here
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_iterator_base_types.h:129: error: `int' is not a class, struct, or union type
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_iterator_base_types.h:130: error: `int' is not a class, struct, or union type
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_iterator_base_types.h:131: error: `int' is not a class, struct, or union type
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_iterator_base_types.h:132: error: `int' is not a class, struct, or union type
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_iterator_base_types.h:133: error: `int' is not a class, struct, or union type


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