Eroare de compilare: main.cpp:77:15: error: 'int y1' redeclared as different kind of symbol int X,Y,x1,x2,y1,y2; ^~ In file included from /usr/include/features.h:367:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/os_defines.h:39, from /usr/include/x86_64-linux-gnu/c++/6/bits/c++config.h:507, from /usr/include/c++/6/iostream:38, from main.cpp:1: /usr/include/x86_64-linux-gnu/bits/mathcalls.h:251:1: note: previous declaration 'double y1(double)' __MATHCALL (y1,, (_Mdouble_)); ^ main.cpp: In function 'long double dist()': main.cpp:92:26: error: cannot convert 'double (*)(double) throw ()' to 'long double' for argument '2' to 'long double sq(long double, long double)' nr=sq(x2,x1)+sq(y2,y1); ^ main.cpp: In function 'int main()': main.cpp:99:10: error: no match for 'operator>>' (operand types are 'InParser' and 'double(double) throw ()') f>>x1>>y1>>x2>>y2; ~~~~~^~~~ main.cpp:38:12: note: candidate: InParser& InParser::operator>>(int&) <near match> InParser& operator >> (int &n) { ^~~~~~~~ main.cpp:38:12: note: conversion of argument 1 would be ill-formed: main.cpp:99:12: error: invalid conversion from 'double (*)(double) throw ()' to 'int' [-fpermissive] f>>x1>>y1>>x2>>y2; ^~ main.cpp:99:12: error: cannot bind rvalue '(int)y1' to 'int&' main.cpp:55:12: note: candidate: InParser& InParser::operator>>(long long int&) <near match> InParser& operator >> (long long &n) { ^~~~~~~~ main.cpp:55:12: note: conversion of argument 1 would be ill-formed: main.cpp:99:12: error: invalid conversion from 'double (*)(double) throw ()' to 'long long int' [-fpermissive] f>>x1>>y1>>x2>>y2; ^~ main.cpp:99:12: error: cannot bind rvalue '(long long int)y1' to 'long long int&' In file included from /usr/include/c++/6/string:53:0, from /usr/include/c++/6/bits/locale_classes.h:40, from /usr/include/c++/6/bits/ios_base.h:41, from /usr/include/c++/6/ios:42, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:1: /usr/include/c++/6/bits/basic_string.tcc:1437:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) operator>>(basic_istream<_CharT, _Traits>& __in, ^~~~~~~~ /usr/include/c++/6/bits/basic_string.tcc:1437:5: note: template argument deduction/substitution failed: main.cpp:99:12: note: 'InParser' is not derived from 'std::basic_istream<_CharT, _Traits>' f>>x1>>y1>>x2>>y2; ^~ In file included from /usr/include/c++/6/istream:934:0, Non zero exit status: 1