objective c-c++結構的構造函數

c++結構的構造函數

有下面兩個C++結構：

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的構造函數正常，Triangle3D的構造出現警告：“Constructor for 'Triangle3D'' must explicitly initialise member 'v2' which does not have default constructor”

但是我已經為Vertex3D類型結構創建了一構造函數，為什麼還會出現這類錯誤呢？應該怎麼解決？謝謝

最佳回答：

你再Vertex3D裡再加個空參數空內容的構造函數進去試試