tolower, toupper を使ってみる (C++)
C++
Published: 2019-12-10

やったこと

tolower, toupper を使ってみます。

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 = "abcdef";
    string s2 = "ABCDEF";
    s1[4] = toupper(s1[4]);
    s2[2] = tolower(s2[1]);

    cout << s1 << endl;
    cout << s2 << endl;
}

出力結果

abcdEf
ABbDEF

参考