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91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/*
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!!DESCRIPTION!! solves the "towers of hanoi" problem
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!!ORIGIN!! BYTE UNIX Benchmarks
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!!LICENCE!! Public Domain
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*/
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/*******************************************************************************
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* The BYTE UNIX Benchmarks - Release 3
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* Module: hanoi.c SID: 3.3 5/15/91 19:30:20
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*
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*******************************************************************************
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* Bug reports, patches, comments, suggestions should be sent to:
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*
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* Ben Smith, Rick Grehan or Tom Yager
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* ben@bytepb.byte.com rick_g@bytepb.byte.com tyager@bytepb.byte.com
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*
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*******************************************************************************
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* Modification Log:
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* $Header: hanoi.c,v 3.5 87/08/06 08:11:14 kenj Exp $
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* August 28, 1990 - Modified timing routines (ty)
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*
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******************************************************************************/
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#define VERBOSE
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/*#define USECMDLINE*/
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#include <stdio.h>
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#include <stdlib.h>
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unsigned short iter = 0; /* number of iterations */
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char num[4];
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long cnt;
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int disk=5, /* default number of disks */
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duration=10; /* default time to run test */
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void mov(unsigned char n,unsigned char f,unsigned char t)
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{
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char o;
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if(n == 1)
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{
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num[f]--;
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num[t]++;
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}
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else
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{
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o = (6-(f+t));
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mov(n-1,f,o);
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mov(1,f,t);
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mov(n-1,o,t);
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}
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#ifdef VERBOSE
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printf("%2d: %2d %2d %2d %2d\n",
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(int)iter,(int)num[0],(int)num[1],(int)num[2],(int)num[3]);
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#endif
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}
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int main(int argc,char **argv)
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{
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#ifdef USECMDLINE
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if (argc < 2) {
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printf("Usage: %s [duration] [disks]\n", argv[0]);
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exit(EXIT_FAILURE);
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}
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else
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{
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if(argc > 1) duration = atoi(argv[1]);
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if(argc > 2) disk = atoi(argv[2]);
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}
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#endif
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printf("towers of hanoi\ndisks: %d\n\n",disk);
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num[1] = disk;
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#ifdef VERBOSE
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printf("%2d: %2d %2d %2d %2d\n",
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(int)iter,(int)num[0],(int)num[1],(int)num[2],(int)num[3]);
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#endif
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while(num[3]<disk)
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{
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mov(disk,1,3);
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++iter;
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}
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return 0;
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}
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