date and time created 82/10/24 18:26:36 by mckusick

SCCS-vsn: games/number/number.c 4.1

diff --git a/usr/src/games/number/number.c b/usr/src/games/number/number.c
new file mode 100644 (file)
index 0000000..8541040
--- /dev/null
+++ b/usr/src/games/number/number.c
@@ -0,0 +1,202 @@
+
+static char sccsid[] = "       number.c        4.1     82/10/24        ";
+
+int    flag;
+int max = 21;
+char   *card[] =
+{
+       "hundred",
+       "thousand",
+       "million",
+       "billion",
+       "trillion",
+       "quadrillion",
+       "quintillion",
+       "sextillion",
+       "septillion",
+       "octillion",
+       "nonillion",
+       "decillion",
+       "undecillion",
+       "duodecillion",
+       "tredecillion",
+       "quattuordecillion",
+       "quindecillion",
+       "sexdecillion",
+       "septendecillion",
+       "octodecillion",
+       "novemdecillion",
+       "vigintillion"
+};
+char *unit[] = {
+       "zero",
+       "one",
+       "two",
+       "three",
+       "four",
+       "five",
+       "six",
+       "seven",
+       "eight",
+       "nine"
+};
+char *teen[] = {
+       "ten",
+       "eleven",
+       "twelve",
+       "thirteen",
+       "fourteen",
+       "fifteen",
+       "sixteen",
+       "seventeen",
+       "eighteen",
+       "nineteen"
+};
+char *decade[] = {
+       "zero",
+       "ten",
+       "twenty",
+       "thirty",
+       "forty",
+       "fifty",
+       "sixty",
+       "seventy",
+       "eighty",
+       "ninety"
+};
+char   line[100];
+main()
+{
+       register c, i, fraction;
+       int r;
+
+
+       fraction = 0;
+       while(c = getchar()) {
+               if(!digit(c))  {
+                       fraction = (c == '.');
+                       putchar(c);
+                       continue;
+               }
+               if(fraction) {
+                       while(digit(c)) {
+                               putchar(' ');
+                               putchar(c);
+                               if(!(c=getchar()))
+                                       exit(1);
+                       }
+                       putchar(' ');
+                       goto out;
+               }
+
+               putchar(' ');
+               i = 0;
+               line[i++] = '0';
+               line[i++] = '0';
+               while(c == '0')
+                       if(!(c=getchar()))
+                               exit(1);
+               while(digit(c)) {
+                       if(i < 98)
+                               line[i++] = c;
+                       if(!(c=getchar()))
+                               exit(1);
+               }
+               line[i] = 0;
+               r = i/3;
+               if(r == 0) {
+                       print("zero");
+                       goto out;
+               }
+               conv(line+i-3*r, r);
+
+out:
+               fraction = (c == '.');
+               nline();
+               printf("...\n");
+               if(c != '\n')
+                       putchar(c);
+       }
+}
+
+conv(p, c)
+char *p;
+{
+
+       if(c > max) {
+               conv(p, c-max);
+               print(card[max]);
+               nline();
+               p += (c-max)*3;
+               c = max;
+       }
+       while(c > 1) {
+               c--;
+               conv(p, 1);
+               cprint(card[c]);
+               nline();
+               p += 3;
+       }
+       ones(p[0]);
+       cprint(card[0]);
+       tens(p);
+       ones(p[2]);
+}
+
+ones(d)
+{
+       if(d=='0')
+               return;
+       print(unit[d-'0']);
+}
+
+tens(p)
+char *p;
+{
+
+       switch(p[1]) {
+
+       case '0':
+               return;
+
+       case '1':
+               print(teen[p[2]-'0']);
+               p[2] = '0';
+               return;
+       }
+
+       print(decade[p[1]-'0']);
+}
+
+
+digit(c)
+{
+
+       if(c < '0' || c > '9')
+               return(0);
+       return(1);
+}
+
+nline()
+{
+
+       if(flag)
+               printf(".\n");
+       flag = 0;
+}
+
+cprint(s)
+{
+
+       if(flag)
+               print(s);
+}
+
+print(s)
+{
+
+       if(flag)
+               printf(" ");
+       printf(s);
+       flag = 1;
+}