Eroare de compilare: main.cpp:17:5: error: 'int index' redeclared as different kind of entity 17 | int index; | ^~~~~ In file included from /usr/include/string.h:432, from /usr/include/c++/10/cstring:42, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:48, from main.cpp:1: /usr/include/strings.h:61:1: note: previous declaration 'const char* index(const char*, int)' 61 | index (const char *__s, int __c) __THROW | ^~~~~ main.cpp: In function 'bool evaluate(std::string)': main.cpp:25:22: error: no match for 'operator[]' (operand types are 'std::string' {aka 'std::__cxx11::basic_string<char>'} and '<unresolved overloaded function type>') 25 | while (expression[index] == '|') | ^ In file included from /usr/include/c++/10/string:55, from /usr/include/c++/10/bits/locale_classes.h:40, from /usr/include/c++/10/bits/ios_base.h:41, from /usr/include/c++/10/ios:42, from /usr/include/c++/10/istream:38, from /usr/include/c++/10/sstream:38, from /usr/include/c++/10/complex:45, from /usr/include/c++/10/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54, from main.cpp:1: /usr/include/c++/10/bits/basic_string.h:1017:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::const_reference std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator[](std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::const_reference = const char&; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]' 1017 | operator[] (size_type __pos) const _GLIBCXX_NOEXCEPT | ^~~~~~~~ /usr/include/c++/10/bits/basic_string.h:1017:29: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} 1017 | operator[] (size_type __pos) const _GLIBCXX_NOEXCEPT | ~~~~~~~~~~^~~~~ /usr/include/c++/10/bits/basic_string.h:1034:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::reference std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator[](std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::reference = char&; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]' 1034 | operator[](size_type __pos) | ^~~~~~~~ /usr/include/c++/10/bits/basic_string.h:1034:28: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} 1034 | operator[](size_type __pos) | ~~~~~~~~~~^~~~~ main.cpp:27:14: error: no post-increment operator for type 27 | index++; | ^~ main.cpp: In function 'bool elementXOR(std::string)': main.cpp:36:22: error: no match for 'operator[]' (operand types are 'std::string' {aka 'std::__cxx11::basic_string<char>'} and '<unresolved overloaded function type>') 36 | while (expression[index] == '^') | ^ In file included from /usr/include/c++/10/string:55, from /usr/include/c++/10/bits/locale_classes.h:40, from /usr/include/c++/10/bits/ios_base.h:41, from /usr/include/c++/10/ios:42, from /usr/include/c++/10/istream:38, from /usr/include/c++/10/sstream:38, from /usr/include/c++/10/complex:45, Non zero exit status: 1