Eroare de compilare: main.cpp:60:11: error: 'int j1' redeclared as different kind of symbol int i1,i2,j1,j2,var; ^~ 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/iosfwd:38, from /usr/include/c++/6/ios:38, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/x86_64-linux-gnu/bits/mathcalls.h:248:1: note: previous declaration 'double j1(double)' __MATHCALL (j1,, (_Mdouble_)); ^ main.cpp: In function 'int main()': main.cpp:72:14: error: no match for 'operator>>' (operand types are 'std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}' and 'double(double) throw ()') f>>i1>>j1>>i2>>j2>>var; ~~~~~^~~~ In file included from /usr/include/c++/6/fstream:38:0, from main.cpp:1: /usr/include/c++/6/istream:120:7: note: candidate: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__istream_type& (*)(std::basic_istream<_CharT, _Traits>::__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] <near match> operator>>(__istream_type& (*__pf)(__istream_type&)) ^~~~~~~~ /usr/include/c++/6/istream:120:7: note: conversion of argument 1 would be ill-formed: main.cpp:72:16: error: invalid conversion from 'double (*)(double) throw ()' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&) {aka std::basic_istream<char>& (*)(std::basic_istream<char>&)}' [-fpermissive] f>>i1>>j1>>i2>>j2>>var; ^~ In file included from /usr/include/c++/6/fstream:38:0, from main.cpp:1: /usr/include/c++/6/istream:124:7: note: candidate: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__ios_type& (*)(std::basic_istream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>; std::basic_istream<_CharT, _Traits>::__ios_type = std::basic_ios<char>] <near match> operator>>(__ios_type& (*__pf)(__ios_type&)) ^~~~~~~~ /usr/include/c++/6/istream:124:7: note: conversion of argument 1 would be ill-formed: main.cpp:72:16: error: invalid conversion from 'double (*)(double) throw ()' to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&) {aka std::basic_ios<char>& (*)(std::basic_ios<char>&)}' [-fpermissive] f>>i1>>j1>>i2>>j2>>var; ^~ In file included from /usr/include/c++/6/fstream:38:0, from main.cpp:1: /usr/include/c++/6/istream:131:7: note: candidate: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] <near match> operator>>(ios_base& (*__pf)(ios_base&)) ^~~~~~~~ /usr/include/c++/6/istream:131:7: note: conversion of argument 1 would be ill-formed: main.cpp:72:16: error: invalid conversion from 'double (*)(double) throw ()' to 'std::ios_base& (*)(std::ios_base&)' [-fpermissive] f>>i1>>j1>>i2>>j2>>var; ^~ In file included from /usr/include/c++/6/fstream:38:0, from main.cpp:1: /usr/include/c++/6/istream:168:7: note: candidate: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] <near match> operator>>(bool& __n) ^~~~~~~~ Non zero exit status: 1