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我想用GLFW和Glad画一个三角形。
但屏幕上什么也显示不出来。
我可以打开窗口，使屏幕上的任何颜色，但不能画三角形。
它显示为enter image description here
我在Ubuntu 22上做这个程序
（导入所需的库文件glad、glfw、math、iostream）

const char* vertexShaderSource = "#version 330 core\n"
"latout (location =0) in vec3 aPos;\n"
"void main()\n"
"{\n"
"   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
"}\0";
const char* fragmentShaderSource = "#version 330 core\n"
"out vec4 FragColor;\n"
"void main()\n"
"{\n"
"   FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
"}\n\0";

int main(){
    glfwInit();

    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

    GLfloat vertices[] = 
    {
        -0.5, -0.5f * float(sqrt(3)) / 3, 0.0f,
        0.5f, -0.5f * float(sqrt(3)) / 3, 0.0f,
        0.0f, 0.5f * float(sqrt(3)) * 2 / 3, 0.0f
    };

    GLFWwindow* window = glfwCreateWindow(600, 600, "TriangleOpenGL", NULL, NULL);
    if(window == NULL)
    {
        std::cout<<"Failed to create GLFW window"<< std::endl;
        glfwTerminate();
        return -1;
    }
    glfwMakeContextCurrent(window);

    gladLoadGL();

    glViewport(0, 0, 600, 600);

    GLuint vertexShader = glCreateShader(GL_VERTEX_SHADER);
    glShaderSource(vertexShader, 1, &vertexShaderSource, NULL);
    glCompileShader(vertexShader);

    GLuint fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
    glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL);
    glCompileShader(fragmentShader);

    GLuint shaderProgram = glCreateProgram();
    glAttachShader(shaderProgram, vertexShader);
    glAttachShader(shaderProgram, fragmentShader);
    glLinkProgram(shaderProgram);

    glDeleteShader(vertexShader);
    glDeleteShader(fragmentShader);


    GLuint VAO, VBO;
    glGenVertexArrays(1, &VAO);
    glBindVertexArray(VAO);

    glGenBuffers(1, &VBO);
    glBindBuffer(GL_ARRAY_BUFFER, VBO);
    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);

    glEnableVertexAttribArray(0);
    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);

    glBindBuffer(GL_ARRAY_BUFFER, 0);
    glBindVertexArray(0);


    glClearColor(0.07f, 0.13f, 0.17f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);
    glfwSwapBuffers(window);

    while(!glfwWindowShouldClose(window))
    {
        glClearColor(0.07f, 0.13f, 0.17f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);
        glUseProgram(shaderProgram);
        glBindVertexArray(VAO);
        glDrawArrays(GL_TRIANGLES, 0, 3);
        glfwSwapBuffers(window);

        glfwPollEvents();
    }

    glDeleteVertexArrays(1, &VAO);
    glDeleteBuffers(1, &VBO);
    glDeleteProgram(shaderProgram);

    glfwDestroyWindow(window);
    glfwTerminate();
    return 0;
}