没有匹配函数来调用&“ constructor&” [英] no matching function to call for "constructor"

问题描述

我正在尝试创建类型为 Vertex 的数组，然后初始化函数中的每个成员。 Vertex 类在构造函数中采用Vector3f：

I am trying to create an array of type Vertex and then initialize each member in a function. The Vertex class takes a Vector3f in the constructor:

Vertex::Vertex(const Vector3f& position) : position(position) { }

在头文件中，我声明像这样的数组：

In the header file I declare the array like this:

class Application
{
    //...
    private:
        Vertex data[3];
    //...
};

在源文件中的某个函数中，我尝试这样：

and in the source file, in a function I try this:

data[0] = Vertex(Vector3f(0, 0, 0));
data[1] = Vertex(Vector3f(0, 0, 0));
data[2] = Vertex(Vector3f(0, 0, 0));

但是当我尝试编译时出现此错误：

But when I try to compile I get this error:

/home/mert/dev/C++/C++3D/src/Application.h: In constructor ‘Application::Application()’:
/home/mert/dev/C++/C++3D/src/Application.h:31:19: error: no matching function for call to ‘Vertex::Vertex()’
     Application() { }
                   ^

我尝试将数组声明为Vertex指针，然后执行 data = new Vertex [3]; ，但结果相同。我应该怎么做才能解决此问题？

I have tried declaring the array as a Vertex pointer and then doing data = new Vertex[3]; but the result was the same. What should I do to fix this?

推荐答案

Vertex类没有默认构造函数。
声明对象数组时，每个数组条目都是通过调用默认构造函数来构建的。
您可以通过添加默认构造函数或声明一个Vertex指针数组，然后在实例化该对象时调用正确的构造函数来解决此问题。

Vertex class has no default constructor. When you declare an array of objects, each array entry is built by calling the default constructor. You may fix this either by adding a default construcor or by declaring an array of Vertex pointers and then calling the correct constructor when instantiating the object.

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