Hello World!

Welcome to The C Continuum!

Even though this blog is called The C Continuum, it’s not only going to be about programming in C, I will probably talk about other languages (prolog, haskell, C++, python, …) and other topics (maths, physics, computer science, …).

But as we are in The C continuum, this introductory post will be dedicated to the first step in the process of learning a new programming language: the very simple, yet enlightening, Hello World! program:

#include <gtk/gtk.h>

int main (int argc, char *argv[])
{
    GtkWidget *window, *label;

    gtk_init(&argc, &argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), "Hello World!");
    gtk_container_set_border_width(GTK_CONTAINER(window), 10);
    gtk_widget_set_size_request(window, 210, 100);

    g_signal_connect(G_OBJECT(window), "destroy",
                     gtk_main_quit, NULL);
    label = gtk_label_new("Hello World!");
    gtk_container_add(GTK_CONTAINER(window), label);

    gtk_widget_show_all(window);

    gtk_main();

    return 0;
}

As you may already know, the code above is written in C and uses the GTK library to generate a graphical interface. If you wish to compile the code you can use the following command:

    gcc -Wall `pkg-config --cflags --libs gtk+-2.0` hello.c -o hello

Enjoy!

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