2019-01-06から1日間の記事一覧
int? nullable; int nonNullable; とりあえずこんな感じの変数を使います 代入 nonNullable = 10; nullable = nonNullable; nullable = 20; nonNullable = nullable; //←コンパイルエラー nonNullable = (int)nullable; nullable = null; nonNullable = (int…
int? nullable; int nonNullable; とりあえずこんな感じの変数を使います 代入 nonNullable = 10; nullable = nonNullable; nullable = 20; nonNullable = nullable; //←コンパイルエラー nonNullable = (int)nullable; nullable = null; nonNullable = (int…