OpenGL code that works in a project named Triangle and nowhere else.

/*****************************************************************//**
 * \file   Triangle.cpp
 * \brief  Generate a triangle using OpenGL
 *
 * \author
 * \date   July 2025
 *********************************************************************/

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

#include <iostream>

// Screen size settings
const unsigned int SCR_WDT{ 800 };
const unsigned int SCR_HGT{ 600 };

// Resizing rendering viewport
void FramebufferSizeCallback(GLFWwindow* window, int width, int height);

void ProcessInput(GLFWwindow* window);


// Vertex shader source code
const char* vertexShaderSource{
    "#version 330 core\n"
    "layout (location = 0) in vec3 aPos;\n"
    "void main()\n"
    "{\n"
    "   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
    "}\0"
};


// Fragment shader source code
const char* fragmentShaderSource{
    "#version 330 core\n"
    "out vec4 fragColor;\n\n"
    "void main()\n"
    "{\n"
    "   fragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
    "}\0"
};

int main()
{
    // Initialize GLFW
    glfwInit();

    // Setting version
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);

    // Core profile
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);


    // Make window
    GLFWwindow* window = glfwCreateWindow(SCR_WDT, SCR_HGT, "I hope this works", NULL, NULL);

    if (window == NULL)
    {
        std::cout << "Failed to create GLFW window.\n" << std::endl;
        glfwTerminate();
        return -1;
    }

    glfwMakeContextCurrent(window);


    glfwSetFramebufferSizeCallback(window, FramebufferSizeCallback);


    // Initialize GLAD
    if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
    {
        std::cout << "Failed to initialize GLAD.\n" << std::endl;
        return -1;
    }


    // Error detection and handling
    int success{};
    char infoLog[512]{};



    // SHADERS
    // VERTEX SHADER---------------------------------------------------------------------
    unsigned int vertexShader; /*
    Store the address of the about-to-be-created vertex shader object*/

    vertexShader = glCreateShader(GL_VERTEX_SHADER); /*
    Create an address for a vertex shader and stores that address in vertexShader*/

    glShaderSource(vertexShader, 1, &vertexShaderSource, NULL); /*
    Attach the shader to the shader source code*/

    glCompileShader(vertexShader); /*
    Compile the shader*/

    glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success); /*
    If compilation fails, return a failure statement*/
    if (!success)
    {
        glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
        std::cout << "ERROR::SHADER::VERTEX::COMPILATION_FAILED.\n" << infoLog << std::endl;
    }

    // FRAGMENT SHADER-------------------------------------------------------------------
    unsigned int fragmentShader;

    fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);

    glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL);

    glCompileShader(fragmentShader);

    glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);

    if (!success)
    {
        glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
        std::cout << "ERROR::SHADER::FRAGMENT::COMPILATION_FAILED.\n" << infoLog << std::endl;
    }




    // SHADER PROGRAM--------------------------------------------------------------------
    unsigned int shaderProgram;
    shaderProgram = glCreateProgram();

    glAttachShader(shaderProgram, vertexShader);
    glAttachShader(shaderProgram, fragmentShader); /*
    Attaching shaders to the shader program*/

    glLinkProgram(shaderProgram); /*
    Linking all shaders into the program*/

    glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
    if (!success)
    {
        glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
        std::cout << "ERROR::PROGRAM::LINKING_FAILED.\n" << infoLog << std::endl;
    }


    glDeleteShader(vertexShader);
    glDeleteShader(fragmentShader); /*
    Delete shaders after linking them to program*/


    // Vertex data
    float vertices[]{
        -0.5f, -0.5f,  0.0f,
         0.0f,  0.5f,  0.0f,
         0.5f, -0.5f,  0.0f
    };


    // VERETEX BUFFER OBJECT VBO AND VERTEX ARRAY OBJECT VAO--------------------------------
    unsigned int VBO; /*
    Stores address of buffer object*/

    glGenBuffers(1, &VBO); /*
    Returns one buffer object address, stores it in VBO*/

    unsigned int VAO;
    glGenVertexArrays(1, &VAO);

    glBindVertexArray(VAO);

    glBindBuffer(GL_ARRAY_BUFFER, VBO); /*
    Binds the target buffer to the given address*/

    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); /*
    Copies the vertex data into the buffer object*/




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

    glEnableVertexAttribArray(0);


    // WIREFRAME MODE
    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);


    // Rendering loop
    while (!glfwWindowShouldClose(window))
    {
        // Inputs
        ProcessInput(window);


        // Rendering loop
        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);


        // Drawing the triangle
        glUseProgram(shaderProgram);
        /*only one triangle so need to bind vertex array every time*/
        glDrawArrays(GL_TRIANGLES, 0, 3);


        glfwPollEvents();
        glfwSwapBuffers(window);
    }


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


    glfwTerminate();

    return 0;
}


void ProcessInput(GLFWwindow* window)
{
    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
    {
        glfwSetWindowShouldClose(window, true);
    }
}


void FramebufferSizeCallback(GLFWwindow* window, int width, int height)
{
    glViewport(0, 0, width, height);
}