Main.cc:5:10: error: ‘N’ was not declared in this scope
string s[N] ;
^
Main.cc: In function ‘int main()’:
Main.cc:10:5: error: ‘s’ was not declared in this scope
s[1] = "A" ;
^
Main.cc:12:45: error: no matching function for call to ‘std::__cxx11::basic_string::basic_string(int)’
s[i] = s[i - 1] + string('A' + i - 1) + s[i - 1];
^
In file included from /usr/include/c++/7/string:52:0,
from /usr/include/c++/7/bits/locale_classes.h:40,
from /usr/include/c++/7/bits/ios_base.h:41,
from /usr/include/c++/7/ios:42,
from /usr/include/c++/7/istream:38,
from /usr/include/c++/7/sstream:38,
from /usr/include/c++/7/complex:45,
from /usr/include/c++/7/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
from Main.cc:1:
/usr/include/c++/7/bits/basic_string.h:604:9: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(_InputIterator, _InputIterator, const _Alloc&)
basic_string(_InputIterator __beg, _InputIterator __end,
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:604:9: note: template argument deduction/substitution failed:
Main.cc:12:45: note: candidate expects 3 arguments, 1 provided
s[i] = s[i - 1] + string('A' + i - 1) + s[i - 1];
^
In file included from /usr/include/c++/7/string:52:0,
from /usr/include/c++/7/bits/locale_classes.h:40,
from /usr/include/c++/7/bits/ios_base.h:41,
from /usr/include/c++/7/ios:42,
from /usr/include/c++/7/istream:38,
from /usr/include/c++/7/sstream:38,
from /usr/include/c++/7/complex:45,
from /usr/include/c++/7/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
from Main.cc:1:
/usr/include/c++/7/bits/basic_string.h:566:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
basic_string(basic_string&& __str, const _Alloc& __a)
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:566:7: note: candidate expects 2 arguments, 1 provided
/usr/include/c++/7/bits/basic_string.h:562:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
basic_string(const basic_string& __str, const _Alloc& __a)
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:562:7: note: candidate expects 2 arguments, 1 provided
/usr/include/c++/7/bits/basic_string.h:558:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::initializer_list<_Tp>, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:558:7: note: no known conversion for argument 1 from ‘int’ to ‘std::initializer_list’
/usr/include/c++/7/bits/basic_string.h:531:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
basic_string(basic_string&& __str) noexcept
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:531:7: note: no known conversion for argument 1 from ‘int’ to ‘std::__cxx11::basic_string&&’
/usr/include/c++/7/bits/basic_string.h:519:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, _CharT, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc())
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:519:7: note: candidate expects 3 arguments, 1 provided
/usr/include/c++/7/bits/basic_string.h:509:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:509:7: note: conversion of argument 1 would be ill-formed:
Main.cc:12:42: error: invalid conversion from ‘int’ to ‘const char*’ [-fpermissive]
s[i] = s[i - 1] + string('A' + i - 1) + s[i - 1];
~~~~~~~~^~~
In file included from /usr/include/c++/7/string:52:0,
from /usr/include/c++/7/bits/locale_classes.h:40,
from /usr/include/c++/7/bits/ios_base.h:41,
from /usr/include/c++/7/ios:42,
from /usr/include/c++/7/istream:38,
from /usr/include/c++/7/sstream:38,
from /usr/include/c++/7/complex:45,
from /usr/include/c++/7/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
from Main.cc:1:
/usr/include/c++/7/bits/basic_string.h:499:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
basic_string(const _CharT* __s, size_type __n,
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:499:7: note: candidate expects 3 arguments, 1 provided
/usr/include/c++/7/bits/basic_string.h:481:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
basic_string(const basic_string& __str, size_type __pos,
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:481:7: note: candidate expects 4 arguments, 1 provided
/usr/include/c++/7/bits/basic_string.h:465:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
basic_string(const basic_string& __str, size_type __pos,
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:465:7: note: candidate expects 3 arguments, 1 provided
/usr/include/c++/7/bits/basic_string.h:450:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
basic_string(const basic_string& __str, size_type __pos,
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:450:7: note: candidate expects 3 arguments, 1 provided
/usr/include/c++/7/bits/basic_string.h:437:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
basic_string(const basic_string& __str)
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:437:7: note: no known conversion for argument 1 from ‘int’ to ‘const std::__cxx11::basic_string&’
/usr/include/c++/7/bits/basic_string.h:429:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
basic_string(const _Alloc& __a) _GLIBCXX_NOEXCEPT
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:429:7: note: no known conversion for argument 1 from ‘int’ to ‘const std::allocator&’
/usr/include/c++/7/bits/basic_string.h:420:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string() [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
basic_string()
^~~~~~~~~~~~
/usr/include/c++/7/bits/basic_string.h:420:7: note: candidate expects 0 arguments, 1 provided