memset を使ってみる (C++)
C++
Published: 2019-10-03

やったこと

memset 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() {
    int aaa[10];

    cout << sizeof(aaa) << "\n";

    memset(aaa, 0, sizeof(aaa));

    for (int a : aaa) printf("%d\n", a);
}

出力結果

40
0
0
0
0
0
0
0
0
0
0

参考