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- /*
- * Quick and dirty program to select adjacent records that are common
- * in the first <arg> character positions.
- *
- */
-
- #include <stdio.h>
-
- #define MAXSIZE 512
-
- char ping[MAXSIZE];
- char pong[MAXSIZE];
-
- int flipflop = 0;
- int size = MAXSIZE-1;
-
- main (argc, argv)
- int argc;
- char *argv[];
- {
- register int index;
- char *newbuf();
-
- if (argc == 2)
- {
- size = atoi (argv[1]);
- }
- while (newbuf() != NULL)
- {
- for (index=0; index < size; index++)
- {
- if (ping[index] != pong[index])
- {
- break;
- }
- }
- if (index == size)
- {
- printf ("%s\n", ping);
- printf ("%s\n", pong);
- }
- }
- return (0);
- }
-
- char *
- newbuf ()
- {
- char *bufp;
-
- if (flipflop)
- {
- bufp = ping;
- flipflop = 0;
- }
- else
- {
- bufp = pong;
- flipflop = 1;
- }
- return (gets (bufp));
- }
-