Added ESC key handling

progs/demos/renormal.c

@@ -1,4 +1,4 @@
-/* $Id: renormal.c,v 1.1 1999/08/19 00:55:40 jtg Exp $ */
+/* $Id: renormal.c,v 1.2 1999/09/17 02:40:51 tjump Exp $ */
 
 /*
  * Test GL_EXT_rescale_normal extension
@@ -6,7 +6,7 @@
  */
 
 /*
- * $Id: renormal.c,v 1.1 1999/08/19 00:55:40 jtg Exp $
+ * $Id: renormal.c,v 1.2 1999/09/17 02:40:51 tjump Exp $
  */
 
 
@@ -95,6 +95,18 @@ static void ModeMenu(int entry)
    glutPostRedisplay();
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
 
 int main( int argc, char *argv[] )
 {
@@ -110,6 +122,7 @@ int main( int argc, char *argv[] )
    glutIdleFunc( Idle );
    glutReshapeFunc( Reshape );
    glutDisplayFunc( Display );
+   glutKeyboardFunc(key);
 
    glutCreateMenu(ModeMenu);
    glutAddMenuEntry("Unscaled", UNSCALED);

progs/redbook/accanti.c

@@ -149,6 +149,19 @@ void myReshape(int w, int h)
     glMatrixMode(GL_MODELVIEW);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -163,6 +176,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/anti.c

@@ -93,6 +93,19 @@ void myReshape(int w, int h)
     glTranslatef (0.0, 0.0, -4.0);  /*  move object into view   */
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -105,7 +118,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }
-

progs/redbook/bezmesh.c

@@ -134,6 +134,19 @@ myReshape(int w, int h)
     glLoadIdentity();
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 int
 main(int argc, char **argv)
 {
@@ -143,6 +156,7 @@ main(int argc, char **argv)
     myinit();
     glutReshapeFunc(myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/checker.c

@@ -55,7 +55,7 @@ void makeCheckImage(void)
 
     for (i = 0; i < checkImageWidth; i++) {
 	for (j = 0; j < checkImageHeight; j++) {
-	    c = ((((i&0x8)==0)^((j&0x8))==0))*255;
+	    c = ((((i&0x8)==0)^((j&0x8)==0)))*255;
 	    checkImage[i][j][0] = (GLubyte) c;
 	    checkImage[i][j][1] = (GLubyte) c;
 	    checkImage[i][j][2] = (GLubyte) c;
@@ -111,6 +111,19 @@ void myReshape(int w, int h)
     glTranslatef(0.0, 0.0, -3.6);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 int
 main(int argc, char** argv)
 {
@@ -120,6 +133,7 @@ main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/depthcue.c

@@ -86,6 +86,19 @@ void myReshape(int w, int h)
     glTranslatef (0.0, 0.0, -4.0);  /*  move object into view   */
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  */
 int main(int argc, char** argv)
@@ -96,7 +109,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc(myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }
-

progs/redbook/dof.c

@@ -219,6 +219,19 @@ void myReshape(int w, int h)
     glViewport(0, 0, w, h);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, depth buffer, and handle input events.
@@ -232,7 +245,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc(myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }
-

progs/redbook/double.c

@@ -99,6 +99,19 @@ void mouse(int button, int state, int x, int y)
    }
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*
  *  Request double buffer display mode.
  *  Register mouse input callback functions
@@ -114,6 +127,7 @@ int main(int argc, char** argv)
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMouseFunc(mouse);
+   glutKeyboardFunc(key);
    glutMainLoop();
    return 0;   /* ANSI C requires main to return int. */
 }

progs/redbook/fog.c

@@ -161,6 +161,19 @@ myReshape(int w, int h)
     glLoadIdentity();
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, depth buffer, and handle input events.
@@ -181,6 +194,7 @@ main(int argc, char **argv)
     glutAddMenuEntry("Fog LINEAR", GL_LINEAR);
     glutAddMenuEntry("Quit", 0);
     glutAttachMenu(GLUT_RIGHT_BUTTON);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/fogindex.c

@@ -120,6 +120,19 @@ myReshape(int w, int h)
   glLoadIdentity();
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, depth buffer, and handle input events.
@@ -133,6 +146,7 @@ main(int argc, char **argv)
   myinit();
   glutReshapeFunc(myReshape);
   glutDisplayFunc(display);
+  glutKeyboardFunc(key);
   glutMainLoop();
   return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/hello.c

@@ -74,6 +74,19 @@ void init (void)
    glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*
  * Declare initial window size, position, and display mode
  * (single buffer and RGBA).  Open window with "hello"
@@ -90,6 +103,7 @@ int main(int argc, char** argv)
    glutCreateWindow ("hello");
    init ();
    glutDisplayFunc(display);
+   glutKeyboardFunc(key);
    glutMainLoop();
    return 0;   /* ANSI C requires main to return int. */
 }

progs/redbook/material.c

@@ -274,6 +274,19 @@ void myReshape(int w, int h)
     glMatrixMode(GL_MODELVIEW);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -287,7 +300,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc(myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }
-

progs/redbook/mipmap.c

@@ -150,6 +150,19 @@ void myReshape(int w, int h)
     glLoadIdentity();
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 int main(int argc, char** argv)
 {
     glutInit(&argc, argv);
@@ -159,7 +172,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }
-

progs/redbook/nurbs.c

@@ -159,6 +159,19 @@ void myReshape(int w, int h)
     gluLookAt(7.0,4.5,4.0, 4.5,4.5,2.0, 6.0,-3.0,2.0);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -171,6 +184,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/pickdepth.c

@@ -183,6 +183,19 @@ myReshape(int w, int h)
   glLoadIdentity();
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, depth buffer, and handle input events.
@@ -198,6 +211,7 @@ main(int argc, char **argv)
   glutMouseFunc(pickRects);
   glutReshapeFunc(myReshape);
   glutDisplayFunc(display);
+  glutKeyboardFunc(key);
   glutMainLoop();
   return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/plane.c

@@ -139,6 +139,19 @@ void myReshape(int w, int h)
     glMatrixMode (GL_MODELVIEW);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -152,6 +165,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/polyoff.c

@@ -209,6 +209,19 @@ void keyboard (unsigned char key, int x, int y)
    }
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -223,6 +236,7 @@ int main(int argc, char** argv)
     glutMouseFunc(mouse);
     glutKeyboardFunc(keyboard);
     gfxinit();
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;
 }

progs/redbook/polys.c

@@ -106,6 +106,19 @@ static void reshape(GLsizei w, GLsizei h)
     glLoadIdentity();
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -119,6 +132,7 @@ int main(int argc, char** argv)
     myinit ();
     glutDisplayFunc(display);
     glutReshapeFunc(reshape);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/sccolorlight.c

@@ -109,6 +109,19 @@ void myReshape(int w, int h)
     glMatrixMode(GL_MODELVIEW);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -122,6 +135,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/scene.c

@@ -109,6 +109,19 @@ void myReshape(int w, int h)
     glMatrixMode (GL_MODELVIEW);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -122,6 +135,7 @@ int main(int argc, char** argv)
     myinit ();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/scenebamb.c

@@ -108,6 +108,19 @@ void myReshape(int w, int h)
     glMatrixMode(GL_MODELVIEW);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -121,6 +134,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/sceneflat.c

@@ -108,6 +108,19 @@ void myReshape(int w, int h)
     glMatrixMode(GL_MODELVIEW);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -121,6 +134,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/stencil.c

@@ -144,6 +144,19 @@ void myReshape(int w, int h)
     glTranslatef(0.0, 0.0, -5.0);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -157,6 +170,7 @@ int main(int argc, char** argv)
     myinit ();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/stroke.c

@@ -163,6 +163,19 @@ static void reshape(GLsizei w, GLsizei h)
     glLoadIdentity();
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -176,6 +189,7 @@ int main(int argc, char** argv)
     myinit ();
     glutDisplayFunc(display);
     glutReshapeFunc(reshape);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/surface.c

@@ -194,6 +194,19 @@ mouse(int button, int state, int x, int y)
     }
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /* Main Loop */
 int
 main(int argc, char** argv)
@@ -212,6 +225,7 @@ main(int argc, char** argv)
     glutAttachMenu(GLUT_RIGHT_BUTTON);
     glutMouseFunc(mouse);
     glutMotionFunc(motion);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/teaambient.c

@@ -129,6 +129,19 @@ myReshape(int w, int h)
     glMatrixMode(GL_MODELVIEW);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
  *  Open window with initial window size, title bar,
  *  RGBA display mode, and handle input events.
@@ -143,6 +156,7 @@ main(int argc, char **argv)
     myinit();
     glutReshapeFunc(myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/teapots.c

@@ -188,6 +188,19 @@ myReshape(int w, int h)
   glMatrixMode(GL_MODELVIEW);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*
  * Main Loop Open window with initial window size, title bar, RGBA display
  * mode, and handle input events.
@@ -201,6 +214,7 @@ main(int argc, char **argv)
   myinit();
   glutReshapeFunc(myReshape);
   glutDisplayFunc(display);
+  glutKeyboardFunc(key);
   glutMainLoop();
   return 0;             /* ANSI C requires main to return int. */
 }

progs/redbook/texbind.c

@@ -58,12 +58,12 @@ void makeCheckImages(void)
 
    for (i = 0; i < checkImageHeight; i++) {
       for (j = 0; j < checkImageWidth; j++) {
-         c = ((((i&0x8)==0)^((j&0x8))==0))*255;
+         c = ((((i&0x8)==0)^((j&0x8)==0)))*255;
          checkImage[i][j][0] = (GLubyte) c;
          checkImage[i][j][1] = (GLubyte) c;
          checkImage[i][j][2] = (GLubyte) c;
          checkImage[i][j][3] = (GLubyte) 255;
-         c = ((((i&0x10)==0)^((j&0x10))==0))*255;
+         c = ((((i&0x10)==0)^((j&0x10)==0)))*255;
          otherImage[i][j][0] = (GLubyte) c;
          otherImage[i][j][1] = (GLubyte) 0;
          otherImage[i][j][2] = (GLubyte) 0;
@@ -169,4 +169,3 @@ int main(int argc, char** argv)
     return 0;
 }
 #endif
-

progs/redbook/texsub.c

@@ -64,7 +64,7 @@ void makeCheckImages(void)
 
    for (i = 0; i < checkImageHeight; i++) {
       for (j = 0; j < checkImageWidth; j++) {
-         c = ((((i&0x8)==0)^((j&0x8))==0))*255;
+         c = ((((i&0x8)==0)^((j&0x8)==0)))*255;
          checkImage[i][j][0] = (GLubyte) c;
          checkImage[i][j][1] = (GLubyte) c;
          checkImage[i][j][2] = (GLubyte) c;
@@ -73,7 +73,7 @@ void makeCheckImages(void)
    }
    for (i = 0; i < subImageHeight; i++) {
       for (j = 0; j < subImageWidth; j++) {
-         c = ((((i&0x4)==0)^((j&0x4))==0))*255;
+         c = ((((i&0x4)==0)^((j&0x4)==0)))*255;
          subImage[i][j][0] = (GLubyte) c;
          subImage[i][j][1] = (GLubyte) 0;
          subImage[i][j][2] = (GLubyte) 0;

progs/redbook/texturesurf.c

@@ -128,6 +128,19 @@ void myReshape(int w, int h)
     glRotatef(85.0, 1.0, 1.0, 1.0);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 int main(int argc, char** argv)
 {
     glutInit(&argc, argv);
@@ -136,6 +149,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc (myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }