Language: C++

//#include <bits/stdc++.h>
#include<iostream>
#include<cmath>
#include<cstdio>
#include<string>
#include<algorithm>
#include<vector>
#include<stack>
#include<queue>
#include<string>
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
using namespace std;
typedef long long ll;//int64
typedef unsigned long long ull;
int gcd(int a,int b){return b?gcd(b,a%b):a;}
int dx[4]={1,0,-1,0};
int dy[4]={0,1,0,-1};
//----------program from here----------



int main(){
  string s;
  cin >> s;
  int ibox[s.size()];
  for(int i=0;i<s.size();++i){//int型のs[i]を投げ込む
    ibox[i]=int(s[i]);
  }
  int Temp;
  for(int i=0;i<s.size();++i){
    if(s.find(s[i])){
      ;
    }else{
      Temp=-1;
    }
  }
  int locate;
  if(s.size()<26){
    for(int i=0;i<s.size();++i){
      Temp=max(ibox[i],ibox[i+1]);
      for(int x=0;x<s.size();++x){
        if(Temp==ibox[x]){
          locate=x;
          break;
        }
      }
      for(int x=locate+1;x<s.size();++x){
        ibox[x]=0;
      }
      ++ibox[locate];
    }
  }
  string astr{ibox,locate};
  cout << astr;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:54:26: error: no matching function for call to 'std::__cxx11::basic_string<char>::basic_string(<brace-enclosed initializer list>)'
   54 |   string astr{ibox,locate};
      |                          ^
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:2:
/usr/include/c++/14/bits/basic_string.h:711:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::initializer_list<_Tp>, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]' (near match)
  711 |       basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:711:7: note:   conversion of argument 1 would be ill-formed:
a.cc:54:15: error: invalid conversion from 'int*' to 'char' [-fpermissive]
   54 |   string astr{ibox,locate};
      |               ^~~~
      |               |
      |               int*
a.cc:54:20: warning: narrowing conversion of 'locate' from 'int' to 'char' [-Wnarrowing]
   54 |   string astr{ibox,locate};
      |                    ^~~~~~
a.cc:54:20: warning: narrowing conversion of 'locate' from 'int' to 'char' [-Wnarrowing]
/usr/include/c++/14/bits/basic_string.h:800:9: note: candidate: 'template<class _Tp, class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Tp&, const _Alloc&) [with <template-parameter-2-2> = _Tp; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  800 |         basic_string(const _Tp& __t, const _Alloc& __a = _Alloc())
      |         ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:800:9: note:   template argument deduction/substitution failed:
a.cc:54:26: note:   variable-sized array type 'int [<anonymous>]' is not a valid template argument
   54 |   string astr{ibox,locate};
      |                          ^
/usr/include/c++/14/bits/basic_string.h:788:9: note: candidate: 'template<class _Tp, class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Tp&, size_type, size_type, const _Alloc&) [with <template-parameter-2-2> = _Tp; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  788 |         basic_string(const _Tp& __t, size_type __pos, size_type __n,
      |         ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:788:9: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/basic_string.h:765:9: note: candidate: 'template<class _InputIterator, class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(_InputIterator, _InputIterator, const _Alloc&) [with <template-parameter-2-2> = _InputIterator; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  765 |         basic_string(_InputIterator __beg, _InputIterator __end,
      |         ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:765:9: note:   template argument deduction/substitution failed:
a.cc:54:26: note:   deduced conflicting types for parameter '_InputIterator' ('int*' and 'int')
   54 |   string astr{ibox,locate};
      |                          ^
/usr/include/c++/14/bits/basic_string.h:669:7: note: candidate: 'template<class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(size_type, _CharT, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  669 |       basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc())
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:669:7: note:   template argument deduction/substitution failed:
a.cc:54:15: note:   cannot convert 'ibox' (type 'int [<anonymous>]') to type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   54 |   string astr{ibox,locate};
      |               ^~~~
/usr/include/c++/14/bits/basic_string.h:646:7: note: candidate: 'template<class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  646 |       basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:646:7: note:   template argument deduction/substitution failed:
a.cc:54:15: note:   cannot convert 'ibox' (type 'int [<anonymous>]') to type 'const char*'
   54 |   string astr{ibox,locate};
      |               ^~~~
/usr/include/c++/14/bits/basic_string.h:721:7: 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<char>; _Alloc = std::allocator<char>]'
  721 |       basic_string(basic_string&& __str, const _Alloc& __a)
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:721:35: note:   no known conversion for argument 1 from 'int [<anonymous>]' to 'std::__cxx11::basic_string<char>&&'
  721 |       basic_string(basic_string&& __str, const _Alloc& __a)
      |                    ~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:716:7: 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<char>; _Alloc = std::allocator<char>]'
  716 |       basic_string(const basic_string& __str, const _Alloc& __a)
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:716:40: note:   no known conversion for argument 1 from 'int [<anonymous>]' to 'const std::__cxx11::basic_string<char>&'
  716 |       basic_string(const basic_string& __str, const _Alloc& __a)
      |                    ~~~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:682:7: 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<char>; _Alloc = std::allocator<char>]'
  682 |       basic_string(basic_string&& __str) noexcept
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:682:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/basic_string.h:624:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
  624 |       basic_string(const _CharT* __s, size_type __n,
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:624:34: note:   no known conversion for argument 1 from 'int [<anonymous>]' to 'const char*'
  624 |       basic_string(const _CharT* __s, size_type __n,
      |                    ~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/basic_string.h:604:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, size_type, size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
  604 |       basic_string(const basic_string& __str, size_type __pos,
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:604:7: note:   candidate expects 4 arguments, 2 provided
/usr/include/c++/14/bits/basic_string.h:586:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, size_type, size_type) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
  586 |       basic_string(const basic_string& __str, size_type __pos,
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:586:7: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/basic_string.h:569:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
  569 |       basic_string(const basic_string& __str, size_type __pos,
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:569:40: note:   no known conversion for argument 1 from 'int [<anonymous>]' to 'const std::__cxx11::basic_string<char>&'
  569 |       basic_string(const basic_string& __str, size_type __pos,
      |                    ~~~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:552:7: 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<char>; _Alloc = std::allocator<char>]'
  552 |       basic_string(const basic_string& __str)
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:552:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/basic_string.h:540:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  540 |       basic_string(const _Alloc& __a) _GLIBCXX_NOEXCEPT
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:540:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/basic_string.h:527:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string() [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  527 |       basic_string()
      |       ^~~~~~~~~~~~
/usr/include/c++/14/bits/basic_string.h:527:7: note:   candidate expects 0 arguments, 2 provided
/usr/include/c+