如何声明一个类没有默认构造函数的对象数组?
问题描述：
如果一个类只有一个带参数的构造函数，如何声明一个数组?我知道在这种情况下推荐使用 vector .例如，如果我有一个班级
If a class has only one constructor with one parameter, how to declare an array? I know that vector is recommended in this case. For example, if I have a class
class Foo{
public:
Foo(int i) {}
}
如何声明一个包含 10000 个 Foo 对象的数组或向量?
How to declare an array or a vector which contains 10000 Foo objects?
答
对于数组，您必须在定义数组的位置为数组的每个元素提供一个初始值设定项.
For an array you would have to provide an initializer for each element of the array at the point where you define the array.
对于向量，您可以为向量的每个成员提供一个实例进行复制.
For a vector you can provide an instance to copy for each member of the vector.
例如
std::vector<Foo> thousand_foos(1000, Foo(42));