fragment.glsl

#version 330 core
out vec4 FragColor;

void main()
{
    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
} 

main.c

typedef float vec3[3];

void loop() {
    vec3 triangle_primitive[] = {
        { -0.5f, -0.5f, 0.0f },
        { 0.5f, -0.5f, 0.0f },
        { 0.0f, 0.5f, 0.0f }
    };
    GLuint VAO;
    GLuint VBO;
    glGenVertexArrays(1, &VAO);
    glGenBuffers(1, &VBO);
    glBindVertexArray(VAO);

    glBindBuffer(GL_ARRAY_BUFFER, VBO);
    glBufferData(GL_ARRAY_BUFFER, sizeof(triangle_primitive), triangle_primitive, GL_STATIC_DRAW);
    
    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(vec3), (void*)0);
    glEnableVertexAttribArray(0);  
    
    glBindBuffer(GL_ARRAY_BUFFER, 0);
    glBindVertexArray(0);

    while(!glfwWindowShouldClose(window))
    {
        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        glUseProgram(CD_Program_Basic);
        glBindVertexArray(VAO);
        glDrawArrays(GL_TRIANGLES, 0, 3);

        glfwSwapBuffers(window);
        glfwPollEvents();
    }
}

vertex.glsl

#version 330 core
layout (location = 0) in vec3 aPos;

void main()
{
    gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);
}