Eroare de compilare: user.cpp:9:14: error: ‘double y1’ redeclared as different kind of symbol double x1,x2,y1,y2,t,ok,pix,piy,auxd; ^ 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/iostream:38, 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 intersectie()’: user.cpp:23:30: error: cannot convert ‘double (*)(double)throw ()’ to ‘double’ in initialization double ax1=x1,ax2=x2,ay1=y1,ay2=y2,at1=t; ^ user.cpp:24:26: error: invalid operands of types ‘double(double)throw ()’ and ‘double’ to binary ‘operator*’ int mmx=x1*x2,mmy=y1*y2,aux; ^ user.cpp:28:23: error: no matching function for call to ‘fabs(double (&)(double)throw ())’ mmy/=cmmdc(fabs(y1),fabs(y2)); ^ user.cpp:28:23: note: candidates are: 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/iostream:38, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:183:1: note: double fabs(double) __MATHCALLX (fabs,, (_Mdouble_ __x), (__const__)); ^ /usr/include/i386-linux-gnu/bits/mathcalls.h:183:1: note: no known conversion for argument 1 from ‘double(double)throw ()’ to ‘double’ In file included from user.cpp:3:0: /usr/include/c++/4.8/cmath:272:5: note: template<class _Tp> constexpr typename __gnu_cxx::__enable_if<std::__is_integer<_Tp>::__value, double>::__type std::fabs(_Tp) fabs(_Tp __x) ^ /usr/include/c++/4.8/cmath:272:5: note: template argument deduction/substitution failed: /usr/include/c++/4.8/cmath: In substitution of ‘template<class _Tp> constexpr typename __gnu_cxx::__enable_if<std::__is_integer<_Tp>::__value, double>::__type std::fabs(_Tp) [with _Tp = double (*)(double)throw ()]’: user.cpp:28:23: required from here /usr/include/c++/4.8/cmath:272:5: error: no type named ‘__type’ in ‘struct __gnu_cxx::__enable_if<false, double>’ /usr/include/c++/4.8/cmath:264:3: note: constexpr long double std::fabs(long double) fabs(long double __x) ^ /usr/include/c++/4.8/cmath:264:3: note: no known conversion for argument 1 from ‘double(double)throw ()’ to ‘long double’ /usr/include/c++/4.8/cmath:260:3: note: constexpr float std::fabs(float) fabs(float __x) ^ /usr/include/c++/4.8/cmath:260:3: note: no known conversion for argument 1 from ‘double(double)throw ()’ to ‘float’ user.cpp:30:12: error: invalid operands of types ‘double(double)throw ()’ and ‘double’ to binary ‘operator==’ if(y1==y2 && y1==0 && x1!=x2) ok=0; ^