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
|
#include <stdio.h>
/* Initialization of bit-fields */
struct s {
signed char a: 6;
unsigned int b: 2;
};
struct t {
unsigned int c: 16;
_Bool d: 1;
short e: 8;
int : 10;
};
union u {
int u: 4;
unsigned int v: 3;
};
void print_s(char * msg, struct s p)
{
printf("%s = { a = %d, b = %d }\n", msg, p.a, p.b);
}
void print_t(char * msg, struct t p)
{
printf("%s = { c = %d, d = %d, e = %d }\n", msg, p.c, p.d, p.e);
}
void print_u_u(char * msg, union u p)
{
printf("%s = { u = %d }\n", msg, p.u);
}
void print_u_v(char * msg, union u p)
{
printf("%s = { v = %u }\n", msg, p.v);
}
/* Global initialization */
struct s glob_s = { -12, 1 };
struct t glob_t = { 123, 2, -45 };
union u glob_u_u = { -3 };
union u glob_u_v = { .v = 6 };
/* Local initialization */
void f(int x, int y, int z)
{
struct s loc_s = { x, y };
struct t loc_t = { x, z, y };
union u loc_u_u = { .u = x };
union u loc_u_v = { .v = z };
print_s("loc_s", loc_s);
print_t("loc_t", loc_t);
print_u_u("loc_u_u", loc_u_u);
print_u_v("loc_u_v", loc_u_v);
print_s("compound_s", (struct s) { y, x });
print_t("compound_t", (struct t) { y, ~z, -x });
print_u_u("compound_u", (union u) { y });
}
int main()
{
print_s("glob_s", glob_s);
print_t("glob_t", glob_t);
print_u_u("glob_u_u", glob_u_u);
print_u_v("glob_u_v", glob_u_v);
f(11, 2, 3);
f(7, 50, 2);
return 0;
}
|
