Eroare de compilare: user.cpp:10:8: error: ‘double sin’ redeclared as different kind of symbol double sin, cos; ^ 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/iosfwd:38, from /usr/include/c++/4.8/ios:38, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:66:1: error: previous declaration of ‘double sin(double)’ __MATHCALL (sin,, (_Mdouble_ __x)); ^ user.cpp:10:13: error: ‘double cos’ redeclared as different kind of symbol double sin, cos; ^ 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/iosfwd:38, from /usr/include/c++/4.8/ios:38, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:64:1: error: previous declaration of ‘double cos(double)’ __MATHCALL (cos,, (_Mdouble_ __x)); ^ user.cpp: In function ‘int main()’: user.cpp:36:9: error: overloaded function with no contextual type information cos = 0.5; ^ user.cpp:37:9: error: overloaded function with no contextual type information sin = 0.866025; ^ user.cpp:45:50: error: invalid operands of types ‘double’ and ‘<unresolved overloaded function type>’ to binary ‘operator*’ pct.x = v[i].x + (v[j].x - v[i].x) * cos - (v[j].y - v[i].y) * sin; ^ user.cpp:45:76: error: invalid operands of types ‘double’ and ‘<unresolved overloaded function type>’ to binary ‘operator*’ pct.x = v[i].x + (v[j].x - v[i].x) * cos - (v[j].y - v[i].y) * sin; ^ user.cpp:46:50: error: invalid operands of types ‘double’ and ‘<unresolved overloaded function type>’ to binary ‘operator*’ pct.y = v[i].y + (v[j].x - v[i].x) * sin + (v[j].y - v[i].y) * cos; ^ user.cpp:46:76: error: invalid operands of types ‘double’ and ‘<unresolved overloaded function type>’ to binary ‘operator*’ pct.y = v[i].y + (v[j].x - v[i].x) * sin + (v[j].y - v[i].y) * cos; ^ user.cpp:50:50: error: invalid operands of types ‘double’ and ‘<unresolved overloaded function type>’ to binary ‘operator*’ pct.x = v[i].x + (v[j].x - v[i].x) * cos + (v[j].y - v[i].y) * sin; ^