NetBSD/games/number/number.c

244 lines
5.3 KiB
C

/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)number.c 5.1 (Berkeley) 2/28/91";
#endif /* not lint */
#include <stdio.h>
#include <ctype.h>
#define YES 1
#define NO 0
#define EOS '\0'
#define MAXNUM 65 /* biggest number we handle */
static char *name1[] = {
"", "one", "two", "three",
"four", "five", "six", "seven",
"eight", "nine", "ten", "eleven",
"twelve", "thirteen", "fourteen", "fifteen",
"sixteen", "seventeen", "eighteen", "nineteen",
},
*name2[] = {
"", "ten", "twenty", "thirty",
"forty", "fifty", "sixty", "seventy",
"eighty", "ninety",
},
*name3[] = {
"hundred", "thousand", "million", "billion",
"trillion", "quadrillion", "quintillion", "sextillion",
"septillion", "octillion", "nonillion", "decillion",
"undecillion", "duodecillion", "tredecillion", "quattuordecillion",
"quindecillion", "sexdecillion",
"septendecillion", "octodecillion",
"novemdecillion", "vigintillion",
};
main(argc,argv)
int argc;
char **argv;
{
register int cnt;
char line[MAXNUM * 2 + 2]; /* MAXNUM '.' MAXNUM '\0' */
if (argc > 1)
for (cnt = 1;cnt < argc;++cnt) {
convert(argv[cnt]);
puts("...");
}
else
while (fgets(line,sizeof(line),stdin)) {
convert(line);
puts("...");
}
exit(0);
}
convert(line)
char *line;
{
register int len,
ret;
register char *C,
*fraction;
for (fraction = NULL, C = line;*C && *C != '\n';++C)
if (!isdigit(*C))
switch(*C) {
case '-':
if (C != line)
usage(NO);
break;
case '.':
if (!fraction) {
fraction = C + 1;
*C = EOS;
break;
}
default:
usage(NO);
}
*C = EOS;
if (*line == '-') {
puts("minus");
++line;
}
ret = NO;
if (len = strlen(line)) {
if (len > MAXNUM)
usage(YES);
ret = unit(len,line);
}
if (fraction && (len = strlen(fraction))) {
if (len > MAXNUM)
usage(YES);
for (C = fraction;*C;++C)
if (*C != '0') {
if (ret)
puts("and");
if (unit(len,fraction)) {
++ret;
pfract(len);
}
break;
}
}
if (!ret)
puts("zero.");
}
unit(len,C)
register int len;
register char *C;
{
register int off,
ret;
ret = NO;
if (len > 3) {
if (len % 3) {
off = len % 3;
len -= off;
if (number(C,off)) {
ret = YES;
printf(" %s.\n",name3[len / 3]);
}
C += off;
}
for (;len > 3;C += 3) {
len -= 3;
if (number(C,3)) {
ret = YES;
printf(" %s.\n",name3[len / 3]);
}
}
}
if (number(C,len)) {
puts(".");
ret = YES;
}
return(ret);
}
number(C,len)
register char *C;
int len;
{
register int val,
ret;
ret = 0;
switch(len) {
case 3:
if (*C != '0') {
++ret;
printf("%s hundred",name1[*C - '0']);
}
++C;
/*FALLTHROUGH*/
case 2:
val = (C[1] - '0') + (C[0] - '0') * 10;
if (val) {
if (ret++)
putchar(' ');
if (val < 20)
fputs(name1[val],stdout);
else {
fputs(name2[val / 10],stdout);
if (val % 10)
printf("-%s",name1[val % 10]);
}
}
break;
case 1:
if (*C != '0') {
++ret;
fputs(name1[*C - '0'],stdout);
}
}
return(ret);
}
pfract(len)
register int len;
{
static char *pref[] = { "", "ten-", "hundred-" };
switch(len) {
case 1:
puts("tenths.");
break;
case 2:
puts("hundredths.");
break;
default:
printf("%s%sths.\n",pref[len % 3],name3[len / 3]);
}
}
usage(toobig)
int toobig;
{
if (toobig)
fprintf(stderr,"number: number too large, max %d digits.\n",MAXNUM);
fputs("usage: number # ...\n",stderr);
exit(-1);
}