Initial data commit

Task/Hello-world-Graphical/C/hello-world-graphical-1.c

@@ -0,0 +1,14 @@
+#include <gtk/gtk.h>
+
+int main (int argc, char **argv) {
+  GtkWidget *window;
+  gtk_init(&argc, &argv);
+
+  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+  gtk_window_set_title (GTK_WINDOW (window), "Goodbye, World");
+  g_signal_connect (G_OBJECT (window), "delete-event", gtk_main_quit, NULL);
+  gtk_widget_show_all (window);
+
+  gtk_main();
+  return 0;
+}

Task/Hello-world-Graphical/C/hello-world-graphical-2.c

@@ -0,0 +1,6 @@
+#include <windows.h>
+
+int main(void) {
+    MessageBox(NULL, TEXT("Goodbye, World!"), TEXT("Rosetta Code"), MB_OK | MB_ICONINFORMATION);
+    return 0;
+}

Task/Hello-world-Graphical/C/hello-world-graphical-3.c

@@ -0,0 +1,20 @@
+#include <os2.h>
+
+int main(void) {
+    HAB hab;
+    HMQ hmq;
+
+    hab = WinInitialize(0);
+    hmq = WinCreateMsgQueue(hab, 0);
+
+    WinMessageBox(HWND_DESKTOP,
+                  HWND_DESKTOP,
+                  "Hello, Presentation Manager!",
+                  "My Program",
+                  0L,
+                  0L);
+
+    WinDestroyMsgQueue(hmq);
+    WinTerminate(hab);
+    return 0;
+}

Task/Hello-world-Graphical/C/hello-world-graphical-4.c

@@ -0,0 +1,23 @@
+#include <conio.h>
+#include <graphics.h>
+
+int main(void) {
+    int Driver = DETECT, Mode;
+    int MaxX, MaxY, X, Y;
+    char Message[] = "Hello, World!";
+
+    initgraph(&Driver, &Mode, "");
+
+    MaxX = getmaxx();
+    MaxY = getmaxy();
+
+    settextstyle(SANS_SERIF_FONT, HORIZ_DIR, 7);
+
+    X = (MaxX - textwidth(Message)) >> 1;
+    Y = (MaxY - textheight(Message)) >> 1;
+    outtextxy(X, Y, Message);
+
+    getch();
+    closegraph();
+    return 0;
+}