glfw code not running and skipping after compiling without errors - c

Question

I am trying to learn the glfw library in C. I have installed the glfw pre-compiled binaries from their official website. I have moved the 32-bit libs from the pre-compiled binaries zip file to my mingw-gcc's lib folder and the include files from the zip file to the mingw-gcc's include folder. I am trying to make the a window using the library and c. I am using vscode as my editor. This is my code:
#include <stdio.h>
#include <windows.h>
#include <glad/glad.h>
#include <GLFW/glfw3.h>
int main() {
printf("Hello World!\n"); //test line
GLFWwindow * window;
if (!glfwInit) {
printf("glfw3 initialization failed");
return -1;
} else {
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
if (!window) {
printf("Could not create window.");
glfwTerminate();
return -1;
} else {
glfwMakeContextCurrent(window);
while (!glfwWindowShouldClose(window)) {
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}
}
}
I am using the following command to compile my code:
gcc main.c -lglfw3dll -lopengl32
The program compiles without any errors but when I run the compiled .exe, nothing happens. I even tried to print hello world before the code runs, but even that doesn't print. What is happening and how do I fix it?
Edit: I fixed the problem by adding the glfw libraries to my system path. now it is working fine

Answer 1

You are doing:
if (!glfwInit)
This just checks to see if the address of glfwInit is non-zero.
It does not call/invoke it.
To invoke it, you want:
if (! glfwInit())
UPDATE:
the code still is doing nothing. it is still not printing the test hello world –
The Parallax
The "Hello World" in your glfwCreateWindow call just sets the window title.
The first question is: Does a window come up on the screen? That is, what, exactly, do you mean by the code is doing nothing ...?
I don't see any drawing calls in your code.
Your code is similar to the example code from: https://www.glfw.org/documentation.html#example-code with some small exceptions but not exactly the same.
In the link, it has:
/* Render here */
glClear(GL_COLOR_BUFFER_BIT);
at the top of the loop.
AFAICT, this will clear the buffer to the background color.
You may need/want to add some drawing calls to put up a rectangle (e.g.) after the glClear call.
Otherwise, you may get the window to come up, but it won't have anything in it.
Here is the step by step tutorial: https://www.glfw.org/docs/3.3/quick.html
It has a more complete/extensive example code. I'd use the code in the two links as a model.

Answer 2

I fixed the problem by adding the glfw libraries to my system path. now it is working fine