#!/bin/sh
# This is a shar archive.
# The rest of this file is a shell script which will extract:
#
# 6_9a.cmp 6_9a.h 6_9a1.h 6_9a2.h 6_9a3.h 6_9a4.h 6_9test.c makefile
#
# 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 23:08:33 EDT 1990
#
echo x - 6_9a.cmp
sed 's/^X//' > 6_9a.cmp << '!EOF!'
R1 = -5
r1 = -5
R2 = 5
r2 = 5
R3 = 5
r3 = 5
!EOF!
ls -l 6_9a.cmp
echo x - 6_9a.h
sed 's/^X//' > 6_9a.h << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
// Exercise 6.9
// Define a restricted integer class
#ifndef RINT_H
#define RINT_H

#include "6_9a1.h"	/* EXPAND */

#include "6_9a2.h"	/* EXPAND4 */

#include "6_9a3.h"	/* EXPAND4 */

#include "6_9a4.h"	/* EXPAND4 */
};
#endif /* RINT_H */
!EOF!
ls -l 6_9a.h
echo x - 6_9a1.h
sed 's/^X//' > 6_9a1.h << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
class RINT
{
    int i;

public:
    // ...
!EOF!
ls -l 6_9a1.h
echo x - 6_9a2.h
sed 's/^X//' > 6_9a2.h << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
RINT() {}			// RINT x;
RINT(int j) { i = j; }		// RINT x = 3;
RINT(RINT& j) { i = j.i; }	// RINT x = RINT
X~RINT() {}
!EOF!
ls -l 6_9a2.h
echo x - 6_9a3.h
sed 's/^X//' > 6_9a3.h << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
RINT& operator= (RINT &j)	// x = y;
    { i = j.i; return *this; }
RINT& operator= (int j)		// x = 5;
    { i = j; return *this; }
!EOF!
ls -l 6_9a3.h
echo x - 6_9a4.h
sed 's/^X//' > 6_9a4.h << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
friend RINT operator+(RINT& i, RINT& j)
    { RINT ret = i.i + j.i; return ret; }
friend RINT operator+(RINT& j)
    { RINT ret = j.i; return ret; }
friend RINT operator-(RINT& i, RINT& j)
    { RINT ret = i.i - j.i; return ret; }
friend RINT operator-(RINT& j)
    { RINT ret = -j.i; return ret; }
friend RINT operator*(RINT& i, RINT& j)
    { RINT ret = i.i * j.i; return ret; }
friend RINT operator/(RINT& i, RINT& j)
    { RINT ret = i.i / j.i; return ret; }
friend RINT operator%(RINT& i, RINT& j)
    { RINT ret = i.i % j.i; return ret; }
operator int() { return i; }	/* DELETE */
!EOF!
ls -l 6_9a4.h
echo x - 6_9test.c
sed 's/^X//' > 6_9test.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
#include <stream.h>
#include "6_9a.h"

main()
{
    RINT R1 = 5;		    int r1 = 5;
    RINT R2 = 0;		    int r2 = 0;
    RINT R3 = R1;		    int r3 = r1;
    
    R1 = 4;			    r1 = 4;
    R2 = R3;			    r2 = r3;
    R1 = R3 + R2;		    r1 = r3 + r2;
    R1 = R3 * 5;		    r1 = r3 * 5;
    R1 = 5 - R3;		    r1 = 5 - r3;
    R1 = -R3;			    r1 = -r3;

    cout << "R1 = " << int(R1) << "\n";
    cout << "r1 = " << r1 << "\n";
    cout << "R2 = " << int(R2) << "\n";
    cout << "r2 = " << r2 << "\n";
    cout << "R3 = " << int(R3) << "\n";
    cout << "r3 = " << r3 << "\n";
    return 0;
}
!EOF!
ls -l 6_9test.c
echo x - makefile
sed 's/^X//' > makefile << '!EOF!'
CC= CC -I. -I../../CC

all: 6_9a

6_9a: 6_9test.c 6_9a.h 6_9a1.h 6_9a2.h 6_9a3.h 6_9a4.h
	$(CC) 6_9test.c -o 6_9a

CMP= 6_9a.cmp
OUT= 6_9a.out

6_9a.out: 6_9a ;	6_9a > 6_9a.out

test: all $(OUT) $(CMP)
	cmp 6_9a.out 6_9a.cmp
	echo tests done
!EOF!
ls -l makefile
# The following exit is to ensure that extra garbage 
# after the end of the shar file will be ignored.
exit 0