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View Compilation Error

0_0_16805336_21834.cpp: In function 'int main()':
0_0_16805336_21834.cpp:47:24: error: no matching function for call to 'qsort(int [1000100], int, int)'
         qsort(num,0,n-1);
                        ^
0_0_16805336_21834.cpp:47:24: note: candidates are:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/cstdlib:72:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ext/string_conversions.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:2850,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_16805336_21834.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/stdlib.h:353:16: note: void qsort(void*, size_t, size_t, int (*)(const void*, const void*))
   void __cdecl qsort(void *_Base,size_t _NumOfElements,size_t _SizeOfElements,int (__cdecl *_PtFuncCompare)(const void *,const void *));
                ^
GCC4.9.2/x86_64-w64-mingw32/include/stdlib.h:353:16: note:   candidate expects 4 arguments, 3 provided
0_0_16805336_21834.cpp:11:6: note: void qsort(int, int)
 void qsort(int l,int r){
      ^
0_0_16805336_21834.cpp:11:6: note:   candidate expects 2 arguments, 3 provided


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