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View Compilation Error

0_0_23379081_7439.cpp: In function 'int main()':
0_0_23379081_7439.cpp:430:56: error: invalid conversion from 'int (*)(akce**, akce**)' to 'int (*)(const void*, const void*)' [-fpermissive]
     qsort (akce, nAkci, sizeof (struct akce *), akceCmp);
                                                        ^
In file included from 0_0_23379081_7439.cpp:2:0:
GCC4.9.2/x86_64-w64-mingw32/include/stdlib.h:353:16: note: initializing argument 4 of '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 *));
                ^
0_0_23379081_7439.cpp:431:61: error: invalid conversion from 'int (*)(policka**, policka**)' to 'int (*)(const void*, const void*)' [-fpermissive]
     qsort (policky, N, sizeof (struct policka *), polickaCmp);
                                                             ^
In file included from 0_0_23379081_7439.cpp:2:0:
GCC4.9.2/x86_64-w64-mingw32/include/stdlib.h:353:16: note: initializing argument 4 of '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 *));
                ^


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