【47】C++的动态数组（std::vector）

#include 
#include 

struct Vertex
{
     float x, y, z;
};

std::ostream& operator<<(std::ostream& stream, const Vertex& vertex)
{
    stream << vertex.x << "," << vertex.y << "," << vertex.z;
    return stream;
}

int main()
{
    std::vector vertices;
    vertices.push_back({1, 2, 3});
    vertices.push_back({4, 5, 6});
    
    
    for (int i = 0; i < vertice.size(); i++)
        std::cout << vertices[i] << std::endl; 
    
    
    for (const auto& v : vertices)  //使用& 避免重复复制
        std::cout << v << std::endl;
    
    
    vertices.erase(vertices.begin() + 1);
    
    
    for (const auto& v : vertices)
        std::cout << v << std::endl;
    
    //清空vector
    vertices.clear();
    return 0;
}