***************
*** 181,187 ****
  
  /**************************************** main() ********************/
  
- void main(int argc, char* argv[])
  {
    /****************************************/
    /*   Initialize GLUT and create window  */
--- 181,187 ----
  
  /**************************************** main() ********************/
  
+ int main(int argc, char* argv[])
  {
    /****************************************/
    /*   Initialize GLUT and create window  */
***************
*** 244,247 ****
    GLUI_Master.set_glutIdleFunc( myGlutIdle );
  
    glutMainLoop();
  }
--- 244,248 ----
    GLUI_Master.set_glutIdleFunc( myGlutIdle );
  
    glutMainLoop();
+   return 0;
  }