blob: 491d6e5dd5db8d07218f1689171bfee5843d727a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
#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>
#endif /* ! vxworks */
/*
* The following functions do nothing useful. They are included simply
* as places to try setting breakpoints at. They are explicitly
* "one-line functions" to verify that this case works (some versions
* of gcc have or have had problems with this).
*/
int marker1 () { return (0); }
int marker2 (a) int a; { return (1); }
void marker3 (a, b) char *a, *b; {}
void marker4 (d) long d; {}
/*
* This simple classical example of recursion is useful for
* testing stack backtraces and such.
*/
int
main (argc, argv, envp)
int argc;
char *argv[], **envp;
{
#ifdef usestubs
set_debug_traps();
breakpoint();
#endif
if (argc == 123456) {
fprintf (stderr, "usage: factorial <number>\n");
return 1;
}
printf ("%d\n", factorial (atoi ("6")));
marker1 ();
marker2 (43);
marker3 ("stack", "trace");
marker4 (177601976L);
return 0;
}
int factorial (value)
int value;
{
if (value > 1) {
value *= factorial (value - 1);
}
return (value);
}
|
