やったこと
char 型のデータを string 型に変換してみます。
確認環境
$ g++ --version
g++ (Homebrew GCC 9.2.0) 9.2.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
調査
test.cpp
#include <bits/stdc++.h>
using namespace std;
int main() {
string s1 = "xyz";
cout << typeid(s1[1]).name() << endl;
string s2 = {s1[1]};
cout << typeid(s2).name() << endl;
cout << s2 << endl;
}
出力結果
c
NSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE
y