c++结构的构造函数

Question

有下面两个C++结构：

struct Vertex3D{
    GLfloat x;
    GLfloat y;
    GLfloat z;
    Vertex3D(GLfloat a, GLfloat b, GLfloat c){
        x = a;
        y = b;
        z = c;
    }
};
struct Triangle3D{
    Vertex3D v1;
    Vertex3D v2;
    Vertex3D v3;
    Triangle3D(Vertex3D vt1, Vertex3D vt2, Vertex3D vt3){
    };
};

Vertex3D的构造函数正常，Triangle3D的构造出现警告：“Constructor for 'Triangle3D'' must explicitly initialise member 'v2' which does not have default constructor”

但是我已经为Vertex3D类型结构创建了一构造函数，为什么还会出现这类错误呢？应该怎么解决？谢谢

Answer 1

你再Vertex3D里再加个空参数空内容的构造函数进去试试