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/*
* This simple classical example of recursion is useful for
* testing stack backtraces and such.
*/
#ifdef vxworks
# include <stdio.h>
/* VxWorks does not supply atoi. */
static int
atoi (z)
char *z;
{
int i = 0;
while (*z >= '0' && *z <= '9')
i = i * 10 + (*z++ - '0');
return i;
}
/* I don't know of any way to pass an array to VxWorks. This function
can be called directly from gdb. */
vxmain (arg)
char *arg;
{
char *argv[2];
argv[0] = "";
argv[1] = arg;
main (2, argv, (char **) 0);
}
#else /* ! vxworks */
# include <stdio.h>
# include <stdlib.h>
#endif /* ! vxworks */
#ifdef PROTOTYPES
int factorial (int);
int
main (int argc, char **argv, char **envp)
#else
int
main (argc, argv, envp)
int argc;
char *argv[], **envp;
#endif
{
#ifdef usestubs
set_debug_traps();
breakpoint();
#endif
#ifdef FAKEARGV
printf ("%d\n", factorial (1));
#else
if (argc != 2) {
printf ("usage: factorial <number>\n");
return 1;
} else {
printf ("%d\n", factorial (atoi (argv[1])));
}
#endif
return 0;
}
#ifdef PROTOTYPES
int factorial (int value)
#else
int factorial (value) int value;
#endif
{
int local_var;
if (value > 1) {
value *= factorial (value - 1);
}
local_var = value;
return (value);
}
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