diff -r -u glui_v2_2.orig/example1.cpp glui_v2_2/example1.cpp
--- glui_v2_2.orig/example1.cpp	2002-11-22 09:08:31.000000000 -0500
+++ glui_v2_2/example1.cpp	2002-11-22 14:06:01.000000000 -0500
@@ -85,7 +85,7 @@
 
 /**************************************** main() ********************/
 
-void main(int argc, char* argv[])
+int main(int argc, char* argv[])
 {
   /****************************************/
   /*   Initialize GLUT and create window  */
@@ -136,6 +136,8 @@
   GLUI_Master.set_glutIdleFunc( myGlutIdle ); 
 
   glutMainLoop();
+
+  return 0;
 }
 
 
diff -r -u glui_v2_2.orig/example2.cpp glui_v2_2/example2.cpp
--- glui_v2_2.orig/example2.cpp	2002-11-22 09:08:31.000000000 -0500
+++ glui_v2_2/example2.cpp	2002-11-22 14:35:42.000000000 -0500
@@ -181,7 +181,7 @@
 
 /**************************************** main() ********************/
 
-void main(int argc, char* argv[])
+int main(int argc, char* argv[])
 {
   /****************************************/
   /*   Initialize GLUT and create window  */
@@ -244,4 +244,6 @@
   GLUI_Master.set_glutIdleFunc( myGlutIdle );
 
   glutMainLoop();
+
+  return 0;
 }
diff -r -u glui_v2_2.orig/example3.cpp glui_v2_2/example3.cpp
--- glui_v2_2.orig/example3.cpp	2002-11-22 09:08:31.000000000 -0500
+++ glui_v2_2/example3.cpp	2002-11-22 14:36:12.000000000 -0500
@@ -263,7 +263,7 @@
 
 /**************************************** main() ********************/
 
-void main(int argc, char* argv[])
+int main(int argc, char* argv[])
 {
   /****************************************/
   /*   Initialize GLUT and create window  */
@@ -392,5 +392,7 @@
 
   /**** Regular GLUT main loop ****/  
   glutMainLoop();
+
+  return 0;
 }
 
diff -r -u glui_v2_2.orig/example4.cpp glui_v2_2/example4.cpp
--- glui_v2_2.orig/example4.cpp	2002-11-22 09:08:31.000000000 -0500
+++ glui_v2_2/example4.cpp	2002-11-22 14:36:34.000000000 -0500
@@ -253,7 +253,7 @@
 
 /**************************************** main() ********************/
 
-void main(int argc, char* argv[])
+int main(int argc, char* argv[])
 {
   /****************************************/
   /*   Initialize GLUT and create window  */
@@ -371,5 +371,7 @@
   /**** Regular GLUT main loop ****/
   
   glutMainLoop();
+
+  return 0;
 }
 
diff -r -u glui_v2_2.orig/example5.cpp glui_v2_2/example5.cpp
--- glui_v2_2.orig/example5.cpp	2002-11-22 09:08:31.000000000 -0500
+++ glui_v2_2/example5.cpp	2002-11-22 14:36:59.000000000 -0500
@@ -310,7 +310,7 @@
 
 /**************************************** main() ********************/
 
-void main(int argc, char* argv[])
+int main(int argc, char* argv[])
 {
   /****************************************/
   /*   Initialize GLUT and create window  */
@@ -478,5 +478,7 @@
   /**** Regular GLUT main loop ****/
   
   glutMainLoop();
+
+  return 0;
 }