Eroare de compilare: user.cpp:11:23: error: ‘int y1’ redeclared as different kind of symbol int a[300][300],x1,x2,y1,y2,n,m; ^ In file included from /usr/include/features.h:357:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/os_defines.h:39, from /usr/include/i386-linux-gnu/c++/4.8/bits/c++config.h:420, from /usr/include/c++/4.8/cstdio:41, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:243:1: error: previous declaration of ‘double y1(double)’ __MATHCALL (y1,, (_Mdouble_)); ^ user.cpp: In function ‘void _read()’: user.cpp:37:34: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘double (*)(double)throw ()’ [-Wformat=] scanf("%d%d%d%d",&x1,&y1,&x2,&y2); ^ user.cpp:39:10: error: invalid types ‘int [300][double(double)throw ()]’ for array subscript a[x1][y1]=1; ^ user.cpp: In function ‘void _bf()’: user.cpp:46:25: error: no matching function for call to ‘std::queue<std::pair<int, int> >::push(std::pair<int, double (*)(double)throw ()>)’ Q.push(make_pair(x1,y1)); ^ user.cpp:46:25: note: candidates are: In file included from /usr/include/c++/4.8/queue:64:0, from user.cpp:2: /usr/include/c++/4.8/bits/stl_queue.h:212:7: note: void std::queue<_Tp, _Sequence>::push(const value_type&) [with _Tp = std::pair<int, int>; _Sequence = std::deque<std::pair<int, int>, std::allocator<std::pair<int, int> > >; std::queue<_Tp, _Sequence>::value_type = std::pair<int, int>] push(const value_type& __x) ^ /usr/include/c++/4.8/bits/stl_queue.h:212:7: note: no known conversion for argument 1 from ‘std::pair<int, double (*)(double)throw ()>’ to ‘const value_type& {aka const std::pair<int, int>&}’ /usr/include/c++/4.8/bits/stl_queue.h:217:7: note: void std::queue<_Tp, _Sequence>::push(std::queue<_Tp, _Sequence>::value_type&&) [with _Tp = std::pair<int, int>; _Sequence = std::deque<std::pair<int, int>, std::allocator<std::pair<int, int> > >; std::queue<_Tp, _Sequence>::value_type = std::pair<int, int>] push(value_type&& __x) ^ /usr/include/c++/4.8/bits/stl_queue.h:217:7: note: no known conversion for argument 1 from ‘std::pair<int, double (*)(double)throw ()>’ to ‘std::queue<std::pair<int, int> >::value_type&& {aka std::pair<int, int>&&}’ user.cpp: In function ‘int main()’: user.cpp:21:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alee.in","r",stdin); ^ user.cpp:22:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alee.out","w",stdout); ^ user.cpp: In function ‘void _read()’: user.cpp:34:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:36:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y),a[x][y]=-1; ^ user.cpp:37:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&x1,&y1,&x2,&y2); ^