Practice Structures, Unions, Enums – What is the output of the following problem ?
#include
struct {
int x;
int y;
union {
int id_no;
char *name;
}b;
}s,*st;
int main()
{
st = &s;
st->x=10;
st->b.id_no = 101;
printf("%d %d
",s.x,s.b.id_no);
return 0;
}
Practice Structures, Unions, Enums – What is the output of the following program ?
#include
int main() {
union {
int a;
int b;
int c;
} u,v;
u.a = 10;
u.b = 20;
printf("%d %d
",u.a,u.b);
return 0;
}
Practice Structures, Unions, Enums – Which of these are valid declarations?
(i) union {
int i;
int j;
};
(ii) union u_tag {
int i;
int j;
};
(iii) union {
int i;
int j;
FILE k;
};
(iv) union {
int i;
int j;
}u;
Practice Structures, Unions, Enums – The following statement is
“The size of a struct is always equal to the sum of the sizes of its members”
Practice Structures, Unions, Enums – Structure can be used
Practice Structures, Unions, Enums – Consider the following declarations.
union id {
char color;
int size;
}
struct {
char country;
int date;
union id;
} flag;
To assign a color to a fag, the correct statement would be
Practice Structures, Unions, Enums – A short integer occupies 2 bytes, an ordinary integer 4 bytes and a long integer occupies 8 bytes of memory.
A structure is defined as
struct TAB {
short a;
int b;
long c;
} TABLE [10];
Then the total memory requirement for TABLE is
Practice Structures, Unions, Enums – If an integer occupies 4 bytes and a character occupies 1 byte of memory, each element of the following structure would occupy how many bytes?
struct name {
int age;
char name[20];
}
Practice Structures, Unions, Enums – Consider the following definitions
struct circle {
float radius;
struct point centre;
} circle cl;
struct point {
int x;
int y;
}
One can define a circle by the following assignment statement
Practice Structures, Unions, Enums – What will be output of the following “c” code?
#include
enum color{BLACK, BLUR, GREEN};
void main()
{
printf("%d %d %d", BLACK, BLUR, GREEN);
}
Practice Structures, Unions, Enums – What will be the size of these structures?
#include
struct S1 {
char c;
int i[2];
double v;
} SA1;
struct S2 {
double x;
int i[2];
char c;
} SA2;
int main()
{
printf("
sizeof S1 %d : Sizeof S2 %d ",sizeof(SA1),sizeof(SA2));
return 0;
}Note:char takes 1 byte, int takes 4 bytes, double takes 8 bytes
Practice Structures, Unions, Enums – What is the output of the following problem ?
#include
struct {
int x;
int y;
union {
int id_no;
char *name;
}b;
}s,*st;
int main()
{
st = &s;
st->x=10;
st->b.id_no = 101;
printf("%d %d
",s.x,s.b.id_no);
return 0;
}What will be the output of the following program on GCC compiler ?<
Practice Structures, Unions, Enums –
What will be the output of the following program on GCC compiler ?
#include<stdio.h>
int main() {
union var {
int a, b;
};
union var v;
v.a=10;
v.b=20;
printf("%d
", v.a);
return 0;
} Point out the error in the following program in GCC compiler?
Practice Structures, Unions, Enums –
Point out the error in the following program in GCC compiler?
#include<stdio.h>
int main() {
struct emp {
char name[25];
int age;
};
struct emp e;
e.name = "Suresh";
e.age = 25;
printf("%s %d
", e.name, e.age);
return 0;
} Point out the error in the following program on GCC compiler?
Practice Structures, Unions, Enums –
Point out the error in the following program on GCC compiler?
#include<stdio.h>
int main() {
struct bits {
float f:2;
}bit;
printf("%d
", sizeof(bit));
return 0;
}