2. Ex-1 #include <stdio.h> struct sample { int a=0; char b='A';
    float c=10.5; };
int main()
    struct sample s;
    printf("%d,%c,%f",s.a,s.b,s.c);
    return 0; }

3. 01
Error: Can not initialize members here We can only declare members inside the structure, initialization of member with declaration is not allowed in structure declaration.

4. Ex-2 #include <stdio.h> int main() { typedef struct tag{
        char str[10];
        int a;
    }har;
    har h1,h2={"IHelp",10};
    h1=h2;
    h1.str[1]='h';
    printf("%s,%d",h1.str,h1.a);
    return 0; }

5. 02
Ihelp,10 It is possible to copy one structure variable into another like h1=h2. Hence value of h2.str is assigned to h1.str.

6. Example 4
#include<stdio.h> void main() { struct india {char c; float d;}; struct world {int a[3]; char b; struct india orissa; }; struct world st ={{1,2,3},'P','q',1.4}; clrscr(); printf("%d \t %c \t %c \t %f", st.a[1],st.b,st.orissa, st.orissa.d); }

7. Output 4
2 p q

8. p5 #include <stdio.h> int main() { union test { int i; int j; };
    {
        int i;
        int j;
    };
     
    union test var=10;
    printf("%d,%d\n",var.i,var.j); }

9. 05
Error: Invalid Initialization You cannot initialize an union variable like this.

10. P5 #include<stdio.h> int main() {
union a { int i; char ch[2]; };
union a u; u.ch[0]=3; u.ch[1]=1;
printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i);
u.ch[0]=‘a’; u.ch[1]=‘b’;
printf(“%d ,%d ,%c ,%c”,u.ch[0],u.ch[1],u.ch[0],u.ch[1]);
return 0; }

11. 05
3, 2, 259
97,98,a,b

12. 05-reason Reason :- The system will allocate 2 bytes for the union.
The statements u.ch[0]=3; u.ch[1]=2; store data in memory as given below.
1st byte [0]= (3)
2nd byte [1]= (1)
so it is (256) (3) . So 256+3=259

13. p6 int main() { struct value { int bit1:1; int bit3:4; int bit4:4;
printf("%d\n", sizeof(bit));
return 0; }

14. 06 2
Note :- Since C is a compiler dependent language, in Turbo C (DOS) the output will be 2, but in GCC (Linux) the output will be 4.

15. p7 #include<stdio.h> int main() { struct bits { int i:40; }bit;
printf("%d\n", sizeof(bit));
return 0; }

16. 07
Error :bit field too large

17. p8 struct marks{ int p:3; int c:3; int m:2; }; void main(){
  struct marks s={2,-6,5};
  printf("%d %d %d",s.p,s.c,s.m);  }

18. 08 2 2 1 ----------- Explanation:
Binary value of 2:  (Select three two bit)
Binary value of 6:
Binary value of -6: =
(Select last three bit)
Binary value of 5:  (Select last two bit)

19. p9 #include <stdio.h> struct student { }; void main()
struct student s[2];
printf("%d", sizeof(s)); }

20. 09

21. p10
#include <stdio.h> struct point { int x; int y; }; struct notpoint void foo(struct point); int main() struct notpoint p1 = {1, 2}; foo(p1); } void foo(struct point p) printf("%d\n", p.x);

22. 010
Compile time error

23. p11 #include <stdio.h> typedef struct p { int x, y; }k;
int main()
struct p p = {1, 2};
k k1 = p;
printf("%d\n", k1.x); }

24. 011 1

25. p12 #include <stdio.h> struct p { char x : 2; int y : 2; };
int main()
struct p p;
p.x = 2;
p.y = 1;
p.x = p.x & p.y;
printf("%d\n", p.x); }

26. 012

27. p13 #include <stdio.h> union u { struct unsigned char x : 2;
unsigned int y : 2;
}p;
int x; };
int main()
union u u;
u.p.x = 2;
printf("%d\n", u.p.x); }

28. 013 2

29. p14 #include <stdio.h> union u { struct unsigned char x : 2;
unsigned int y : 2;
}p;
int x; };
int main()
union u u.p.x = 2;
printf("%d\n", u.p.x); }

30. 014
Compile time error

31. p15 #include <stdio.h> struct p { unsigned int x : 1;
unsigned int y : 1; };
int main()
struct p p;
p.x = 1;
p.y = 2;
printf("%d\n", p.y); }

32. 015