diff options
Diffstat (limited to 'games/caesar/caesar.c')
| -rw-r--r-- | games/caesar/caesar.c | 34 |
1 files changed, 20 insertions, 14 deletions
diff --git a/games/caesar/caesar.c b/games/caesar/caesar.c index b002786..749da50 100644 --- a/games/caesar/caesar.c +++ b/games/caesar/caesar.c @@ -40,24 +40,28 @@ */ #ifndef lint -static char copyright[] = +static const char copyright[] = "@(#) Copyright (c) 1989, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint -static char sccsid[] = "@(#)caesar.c 8.1 (Berkeley) 5/31/93"; +static const char sccsid[] = "@(#)caesar.c 8.1 (Berkeley) 5/31/93"; #endif /* not lint */ +#include <errno.h> #include <math.h> #include <stdio.h> +#include <stdlib.h> +#include <string.h> #include <ctype.h> #include <unistd.h> #define LINELENGTH 2048 #define ROTATE(ch, perm) \ + isascii(ch) ? ( \ isupper(ch) ? ('A' + (ch - 'A' + perm) % 26) : \ - islower(ch) ? ('a' + (ch - 'a' + perm) % 26) : ch + islower(ch) ? ('a' + (ch - 'a' + perm) % 26) : ch) : ch /* * letter frequencies (taken from some unix(tm) documentation) @@ -69,15 +73,15 @@ double stdf[26] = { 2.62, 0.81, 1.88, 0.23, 2.07, 0.06, }; -main(argc, argv) +void printit(); + +void main(argc, argv) int argc; char **argv; { - extern int errno; - register int ch, dot, i, nread, winnerdot; + register int ch, dot, i, nread, winnerdot = 0; register char *inbuf; int obs[26], try, winner; - char *malloc(), *strerror(); if (argc > 1) printit(argv[1]); @@ -99,11 +103,13 @@ main(argc, argv) exit(1); } for (i = nread; i--;) { - ch = inbuf[i]; - if (islower(ch)) - ++obs[ch - 'a']; - else if (isupper(ch)) - ++obs[ch - 'A']; + ch = (unsigned char) inbuf[i]; + if (isascii(ch)) { + if (islower(ch)) + ++obs[ch - 'a']; + else if (isupper(ch)) + ++obs[ch - 'A']; + } } /* @@ -126,7 +132,7 @@ main(argc, argv) for (;;) { for (i = 0; i < nread; ++i) { - ch = inbuf[i]; + ch = (unsigned char) inbuf[i]; putchar(ROTATE(ch, winner)); } if (nread < LINELENGTH) @@ -139,7 +145,7 @@ main(argc, argv) exit(0); } -printit(arg) +void printit(arg) char *arg; { register int ch, rot; |
