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The World of Computer Software
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World_Of_Computer_Software-02-385-Vol-1of3.iso
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EXAMPLES
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SQUARES
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SQUARES.C
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C/C++ Source or Header
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1992-02-06
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2KB
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64 lines
/*
* Copyright (c) 1987, 1988, 1989 Stanford University
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Stanford not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. Stanford makes no representations about
* the suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* STANFORD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
* IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Implementation of squares subject.
*/
#include "squares.h"
#include <time.h>
#include <stdlib.h>
Squares::Squares () {
head = nil;
}
Squares::~Squares () {
register SquareData* p, * next;
for (p = head; p != nil; p = next) {
next = p->next;
delete p;
}
}
void Squares::Add (float cx, float cy, float size) {
register SquareData* s = new SquareData;
s->cx = cx;
s->cy = cy;
s->size = size;
s->next = head;
head = s;
Notify();
}
static float Random () {
const int bigint = 1<<14;
int r = rand();
return float(r % bigint) / float(bigint);
}
void Squares::Add () {
Add(Random()/2 + .25, Random()/2 + .25, Random()/2);
}