dev_test

以前做的操作系统的课程设计,内容包括：1)编写一个C程序

#include<sys/types.h>
#include<unistd.h>
#include<stdio.h>
#include<stdlib.h>
#include<gtk/gtk.h>
void hello( GtkWidget *widget, gpointer   data )
{
    g_print ("hello i am %s\n", (gchar *) data);
}
void destroy( GtkWidget *widget,
              gpointer   data )
{
    gtk_main_quit ();
}
int main(int   argc,       char *argv[])
{
	 GtkWidget *window;
    GtkWidget *button;
pid_t child1,child2;
    child1=fork();
if(child1==0){   
		printf("this is child1 proess!\tmy PID is %d\n",getpid());
		 gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_set_usize(GTK_WIDGET(window),200,100); gtk_window_set_title(GTK_WINDOW(window),"i am child1");
g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (destroy), NULL);
gtk_container_set_border_width (GTK_CONTAINER (window), 10);
button = gtk_button_new_with_label ("child1");
g_signal_connect (G_OBJECT (button), "clicked", G_CALLBACK (hello), "child1");
gtk_container_add (GTK_CONTAINER (window), button);
gtk_widget_show (button);
        gtk_widget_show (window);
gtk_main ();
exit(0);
	}
	else if( (child2=fork()) ==0){
		printf("this is child2 proess!\tmy PID is %d\n",getpid());
		gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_set_usize(GTK_WIDGET(window),200,100);
gtk_window_set_title(GTK_WINDOW(window),"i am child2");
g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (destroy), NULL);
gtk_container_set_border_width (GTK_CONTAINER (window), 10);
button = gtk_button_new_with_label ("child2");
g_signal_connect (G_OBJECT (button), "clicked", G_CALLBACK (hello), "child2");
gtk_container_add (GTK_CONTAINER (window), button); gtk_widget_show (button);
       gtk_widget_show (window);
gtk_main ();
exit(0);
	}
       else{         
               printf("this is parent proess!\tmy PID is %d\n",getpid());
               gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_set_usize(GTK_WIDGET(window),200,100);
 gtk_window_set_title(GTK_WINDOW(window),"i am parent");
g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (destroy), NULL);
 gtk_container_set_border_width (GTK_CONTAINER (window), 10);
 button = gtk_button_new_with_label ("parent");
g_signal_connect (G_OBJECT (button), "clicked", G_CALLBACK (hello), "parent");
 gtk_container_add (GTK_CONTAINER (window), button);
gtk_widget_show (button);
               gtk_widget_show (window);
gtk_main ();
exit(0);
         }
	return 0;
}