Hello Triangle in OpenGL using GLFW and GLAD 2

glhellotriangle.cpp

#include <GLFW/glfw3.h>
#include <glad/gl.h>

int main()
{
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
    auto window = glfwCreateWindow(800, 600, "Test", nullptr, nullptr);
    glfwMakeContextCurrent(window);
    gladLoadGL(glfwGetProcAddress);

// -----------------------------------------------------------------------------

    GLuint vao;
    glGenVertexArrays(1, &vao);
    glBindVertexArray(vao);

    GLuint vbo;
    glGenBuffers(1, &vbo);
    glBindBuffer(GL_ARRAY_BUFFER, vbo);
    float vertices[] {
        -0.75f, -0.75f,
        0.75f, -0.75f,
        0.f, 0.75f,
    };
    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);

    glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), (const void*)0);
    glEnableVertexAttribArray(0);

// -----------------------------------------------------------------------------

    GLuint vs = glCreateShader(GL_VERTEX_SHADER);
    const char* vertexSource = R"(
        #version 460
        in vec2 vp;
        void main() {
            gl_Position = vec4(vp, 0, 1);
        }
    )";
    glShaderSource(vs, 1, &vertexSource, nullptr);
    glCompileShader(vs);

    GLuint fs = glCreateShader(GL_FRAGMENT_SHADER);
    const char* fragSource = R"(
        #version 460
        out vec4 color;
        void main() {
            color = vec4(1, 0, 0, 1);
        }
    )";
    glShaderSource(fs, 1, &fragSource, nullptr);
    glCompileShader(fs);

    GLuint sp = glCreateProgram();
    glAttachShader(sp, vs);
    glAttachShader(sp, fs);
    glLinkProgram(sp);

// -----------------------------------------------------------------------------

    while (!glfwWindowShouldClose(window))
    {
        glUseProgram(sp);
        glBindVertexArray(vao);
        glDrawArrays(GL_TRIANGLES, 0, 3);

        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    glfwDestroyWindow(window);
    glfwTerminate();
}