Eroare de compilare: user.cpp:102:9: error: ‘int y1’ redeclared as different kind of symbol int x1, y1, x2, y2; ^~ In file included from /usr/include/features.h:367:0, from /usr/include/x86_64-linux-gnu/c++/6/32/bits/os_defines.h:39, from /usr/include/x86_64-linux-gnu/c++/6/32/bits/c++config.h:507, from /usr/include/c++/6/iosfwd:38, from /usr/include/c++/6/ios:38, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from user.cpp:1: /usr/include/bits/mathcalls.h:251:1: note: previous declaration ‘double y1(double)’ __MATHCALL (y1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:139:19: error: assignment of function ‘double y1(double)’ y1 = Read(); ^ user.cpp:139:19: error: cannot convert ‘int’ to ‘double(double) throw ()’ in assignment user.cpp:145:40: warning: pointer to a function used in arithmetic [-Wpointer-arith] subtract[j] = root[j][y1 - 1]; ^ user.cpp:145:41: error: invalid types ‘Node* [1101][double (*)(double) throw ()]’ for array subscript subtract[j] = root[j][y1 - 1]; ^ user.cpp: In function ‘char Advance()’: user.cpp:25:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, SIZE, stdin); ^ user.cpp: In function ‘Node* Update(Node*, int, int, int)’: user.cpp:67:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:128:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("engineer.in", "r", stdin); ^ user.cpp:129:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("engineer.out", "w", stdout); ^