我们为什么使用<代码>新代码> 尽管结构在C#中具有价值类型,但还是初步形成结构的关键词?
What is the use of default keyword in C#? Is it introduced in C# 3.0 ?
我们为什么使用<代码>新代码> 尽管结构在C#中具有价值类型,但还是初步形成结构的关键词?
由于这是你所说的话的关键词:use/em>,以开始形成一种价值类型(通过一种习惯构造或简单地使记忆零化(代号为new(<>>
,>在价值类型上的使用),尽管即便没有必要,也存在一种优势。 添加“<>不同>的同一概念的关键词似乎有困难。 如果你认为是通用的:
public static T Create<T>() where T : new() // not terribly helpful, but....
{
return new T();
}
如果在参考型号和价值型号方面有不同的关键词,这将非常混淆,例如,var0 = 创造与设计;int>:
。 再说一遍,这个例子令人sil笑皆是,但这里有点。
当你使用新运营商制造一个构件时,便会制造,并打电话给适当的建筑商。
但有一个例外。 可以在不使用新运营商的情况下即刻进行施工。 在这种情况下,没有建筑商呼吁,这提高了分配的效率。 然而,这些田地仍将是没有签名的,只有在所有田地都开标之前,才能使用。
例如:
public struct CoOrds
{
public int x, y;
public CoOrds(int p1, int p2)
{
x = p1;
y = p2;
}
}
// Declare an
CoOrds coords1;
// Initialize:
coords1.x = 10;
coords1.y = 20;
What is the use of default keyword in C#? Is it introduced in C# 3.0 ?
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