//#include
//#include
//#include
//安全声明：并未掌握，代码可能有错误，自行辨别
int main(void)
{
    GLFWwindow* window;

    /* Initialize the library */
    if (!glfwInit())
        return -1;
    /* Create a windowed mode window and its OpenGL context */
    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);

    if (!window)
    {
        glfwTerminate();
        return -1;
    }

    /* Make the window's context current */
    glfwMakeContextCurrent(window);

    if (glewInit != GLEW_OK)
        std::cout << "ERROR!" << std::endl;
    std::cout << glGetString(GL_VERSION) << std::endl;
    /* Loop until the user closes the window */
    
    float positions[6] = {
        -0.5f, -0.5f,
         0.0f,  0.5f,
         0.5f, -0.5f
    };

    unsigned int buffer;
    glGenBuffers(1, &buffer);//创建缓冲区
    glBindBuffer(GL_ARRAY_BUFFER, buffer);//绑定
    glBufferData(GL_ARRAY_BUFFER, 6 * sizeof(float),positions,GL_STATIC_DRAW);
    glEnableVertexAttribArray(0);

    glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 2, 0);
    glBindBuffer(GL_ARRAY_BUFFER,0);
    //0索引开始，两个点，数据类型为float，是否想要归一化，false,stride顶点之间的字节数2*4=8使用sizeof进行测量
    //由于没有类似纹理坐标的额外属性，直接填0(偏移量)，如果有，计算，并填写eg.加上0.5f，0.5f，2*4=8，填(const void*)8；
    while (!glfwWindowShouldClose(window))
    {
        /* Render here */
        glClear(GL_COLOR_BUFFER_BIT);

        glBegin(GL_TRIANGLES);
        glVertex2f(-0.5f, -0.5f);
        glVertex2f( 0.0f,  0.5f);
        glVertex2f( 0.5f, -0.5f);
        glEnd();
        /* Swap front and back buffers */
        glfwSwapBuffers(window);

        /* Poll for and process events */
        glfwPollEvents();
    }

    glfwTerminate();
    return 0;
}

头文件显示异常，所以注释