c ++动态数组的初始值 [英] c++ initial value of dynamic array

问题描述

我需要动态创建一个整数数组。我发现使用静态数组时的语法

I need to dynamically create an array of integer. I've found that when using a static array the syntax

int a [5]={0};

正确将所有元素的值初始化为0。

initializes correctly the value of all elements to 0.

创建动态数组时是否有类似方法

Is there a way to do something similar when creating a dynamic array like

int* a = new int[size];

而不必遍历数组的所有元素？还是用for循环分配值仍然是最佳选择？
谢谢

without having to loop over all elements of the a array? or maybe assigning the value with a for loop is still the optimal way to go? Thanks

推荐答案

当然，只需将（）用于值初始化：

Sure, just use () for value-initialization:

 int* ptr = new int[size]();

（取自此答案是我之前密切相关的问题）

(taken from this answer to my earlier closely related question)

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