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/* Assignment between structs and unions */
#include <stdio.h>
struct small {
int x;
double d;
char c[5];
};
struct big {
int x[100];
};
union u1 {
char c;
short s;
};
union u2 {
struct small u;
struct big v;
};
struct small A = { 1234, 3.14159, { 'H', 'e', 'l', 'l', 'o' }};
struct big B = { 1, 2, 3, 4, 5 };
union u1 C;
union u2 D;
int main()
{
struct small A1, A2, AA[1];
struct big B1, B2;
union u1 C2;
union u2 D2;
int i;
C.c = 'z';
for (i = 0; i < 99; i++) D.v.x[i] = i;
A2 = A;
printf("A2 = { %d, %f, { '%c', ... , '%c' } }\n",
A2.x, A2.d, A2.c[0], A2.c[4]);
A2 = (A1 = A);
printf("A2 = { %d, %f, { '%c', ... , '%c' } }\n",
A2.x, A2.d, A2.c[0], A2.c[4]);
B2 = B;
printf("B2 = { %d, ..., %d, ..., %d }\n",
B2.x[0], B2.x[4], B2.x[99]);
B2 = (B1 = B);
printf("B2 = { %d, ..., %d, ..., %d }\n",
B2.x[0], B2.x[4], B2.x[99]);
C2 = C;
printf("C2.c = '%c'\n", C2.c);
D2 = D;
printf("D2.v = { %d, ..., %d, ..., %d }\n",
D2.v.x[0], D2.v.x[4], D2.v.x[99]);
AA[0] = A;
A1.x = 0;
A2.x = 0;
AA[A1.x] = AA[A2.x];
printf("AA[0] = { %d, %f, { '%c', ... , '%c' } }\n",
AA[0].x, AA[0].d, AA[0].c[0], AA[0].c[4]);
return 0;
}
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