#!/bin/sh
# This is a shar archive.
# The rest of this file is a shell script which will extract:
#
# 7_5a1_line.c 7_5a1_rect.c 7_5a2_line.c 7_5a2_rect.c 7_5a3_line.c 7_5bline.c 7_5brect.c line.h makefile rectangle.h tst.c
#
# To extract the files from this shell archive file simply
# create a directory for this file, move the archive file
# to it and enter the command
#
#	sh filename
# 
# The files will be extracted automatically.
# Note: Do not use csh.
#
# Archive created: Mon Jul 30 23:10:37 EDT 1990
#
echo x - 7_5a1_line.c
sed 's/^X//' > 7_5a1_line.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
// Exercise 7.5
// Rectangle derived from a line.
// The data is in the public name space.
class line : public shape
{
public:
    /* do not use this data unless you really have to */
    point w, e;

    point north();
    point east();
    point south();
    point west();

    void move(int a, int b);
    void draw();

    line(point a, point b);
    line(point a, int l);
};
!EOF!
ls -l 7_5a1_line.c
echo x - 7_5a1_rect.c
sed 's/^X//' > 7_5a1_rect.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
// Exercise 7.5
// rectangle derived from a line
class rectangle : public line
{
public:
    point north() { return point((w.x+e.x)/2,e.y); }
    point east();
    point south() { return point((w.x+e.x)/2,w.y); }
    point west();
    point neast() { return e; }
    point seast();
    point swest() { return w; }
    point nwest();
    void draw();
    rectangle(point a, point b);
};
!EOF!
ls -l 7_5a1_rect.c
echo x - 7_5a2_line.c
sed 's/^X//' > 7_5a2_line.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
// Exercise 7.5
// Rectangle derived from a line.
// The data is private but available
// to class rectangle.
class line : public shape
{
    point w, e;
    friend class rectangle;

public:
    point north();
    point east();
    point south();
    point west();

    void move(int a, int b);
    void draw();

    line(point a, point b);
    line(point a, int l);
};
!EOF!
ls -l 7_5a2_line.c
echo x - 7_5a2_rect.c
sed 's/^X//' > 7_5a2_rect.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
// Exercise 7.5
// rectangle derived from a line
class rectangle : public line
{
    point &sw() { return w; }
    point &ne() { return e; }

public:
    point north() { return point((sw().x+ne().x)/2,ne().y); }
    point east();
    point south() { return point((sw().x+ne().x)/2,sw().y); }
    point west();
    point neast() { return ne(); }
    point seast();
    point swest() { return sw(); }
    point nwest();
    void draw();
    rectangle(point a, point b);
};
!EOF!
ls -l 7_5a2_rect.c
echo x - 7_5a3_line.c
sed 's/^X//' > 7_5a3_line.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
// Exercise 7.5
// Rectangle derived from a line.
// the data in available to derived classes,
// but otherwise private.
class line : public shape
{
protected:
    point w, e;

public:
    point north();
    point east();
    point south();
    point west();

    void move(int a, int b);
    void draw();

    line(point a, point b);
    line(point a, int l);
};
!EOF!
ls -l 7_5a3_line.c
echo x - 7_5bline.c
sed 's/^X//' > 7_5bline.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
// Exercise 7.5
// rectangle derived from a line
class line : public rectangle
{
    point &w() { return sw; }
    point &e() { return ne; }

public:
    point north()
	{ return point((w().x+e().x)/2,
	               e().y<w().y?w().y:e().y); }
    point east();
    point south()
	{ return point((w().x+e().x)/2, 
	               e().y<w().y?e().y:w().y); }
    point west();

    void move(int a, int b)
	{ w().x += a; w().y += b; 
	  e().x += a; e().y += b; }
    void draw() { put_line(w(),e()); }

    line(point a, point b) : (a, b) { }
    line(point a, int l) : 
	( point(a.x+l-1,a.y), a) { }
};
!EOF!
ls -l 7_5bline.c
echo x - 7_5brect.c
sed 's/^X//' > 7_5brect.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
// Exercise 7.5
// rectangle derived from a line
class rectangle : public shape
{
    point sw, ne;
    friend class line;

public:
    point north() { return point((sw.x+ne.x)/2,ne.y); }
    point east();
    point south() { return point((sw.x+ne.x)/2,sw.y); }
    point west();
    point neast() { return ne; }
    point seast();
    point swest() { return sw; }
    point nwest();
    void draw();
    void move(int a, int b)
	{ sw.x+=a; sw.y+=b; ne.x+=a; ne.y+=b; }
    rectangle(point a, point b);
};
!EOF!
ls -l 7_5brect.c
echo x - line.h
sed 's/^X//' > line.h << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
class line; class rectangle;
#ifdef A1L
#include "7_5a1_line.c"		// class line : public shape
#endif

#ifdef A2L
#include "7_5a2_line.c"		// class line : public shape
#endif

#ifdef A3L
#include "7_5a3_line.c"		// class line : public shape
#endif

#ifdef BL
#include "7_5bline.c"		// class line : public shape
#endif
!EOF!
ls -l line.h
echo x - makefile
sed 's/^X//' > makefile << '!EOF!'
CC= CC -I. -I../shape -I../../CC
CFLAGS=

all: ta1l1r.o ta2l1r.o ta3l1r.o ta1l2r.o ta2l2r.o ta3l2r.o tbl.o

ta1l1r.o: tst.c 7_5a1_line.c 7_5a1_rect.c
	$(CC) $(CFLAGS) -DA1L -DA1R -c tst.c
	mv tst.o ta1l1r.o

ta2l1r.o: tst.c 7_5a2_line.c 7_5a1_rect.c
	$(CC) $(CFLAGS) -DA2L -DA1R -c tst.c
	mv tst.o ta2l1r.o

ta3l1r.o: tst.c 7_5a3_line.c 7_5a1_rect.c
	$(CC) $(CFLAGS) -DA3L -DA1R -c tst.c
	mv tst.o ta3l1r.o

ta1l2r.o: tst.c 7_5a1_line.c 7_5a2_rect.c
	$(CC) $(CFLAGS) -DA1L -DA2R -c tst.c
	mv tst.o ta1l2r.o

ta2l2r.o: tst.c 7_5a2_line.c 7_5a2_rect.c
	$(CC) $(CFLAGS) -DA2L -DA2R -c tst.c
	mv tst.o ta2l2r.o

ta3l2r.o: tst.c 7_5a3_line.c 7_5a2_rect.c
	$(CC) $(CFLAGS) -DA3L -DA2R -c tst.c
	mv tst.o ta3l2r.o

tbl.o:	  tst.c 7_5brect.c 7_5bline.c
	$(CC) $(CFLAGS) -DBL -DRECTFIRST -c tst.c
	mv tst.o tbl.o

test: all
	@echo test done
!EOF!
ls -l makefile
echo x - rectangle.h
sed 's/^X//' > rectangle.h << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
class line; class rectangle;
#ifdef A1R
#include "7_5a1_rect.c"		// class rectangle : public line
#endif

#ifdef A2R
#include "7_5a2_rect.c"		// class rectangle : public line
#endif

#ifdef BL
#include "7_5brect.c"		// class rectangle : public line
#endif
!EOF!
ls -l rectangle.h
echo x - tst.c
sed 's/^X//' > tst.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
#include "shape.h"
!EOF!
ls -l tst.c
# The following exit is to ensure that extra garbage 
# after the end of the shar file will be ignored.
exit 0