Structure & Union

Find the output of following C program

1.    #include<stdio.h>
int main()
{
struct A
{
 int age;  
 char *name;
}A1;
struct A B1; 
A1.age=22;
A1.name="sachi";  
printf("Age=%d\t",A1.age);   
printf("Name=%s\n",A1.name);
B1 = A1;
printf("Age=%d\t",B1.age);
printf("Name=%s\n",B1.name);
return 0;
}

2.    #include<stdio.h>
int main()
{
struct data
{
 int age=22;
 char *name="sachi"; 
}*ptr;
printf("%s\t",ptr->name);
printf("%d\n",ptr->age) ;
return 0;
}

3.    #include<stdio.h>
int main()
{
struct data
 {
  int age;
  char *name;
 }*ptr;
char name1[10] ="Soumya";
ptr->name=name1;
ptr->age=39;
printf("%s\t",ptr->name);
printf("%d\n",ptr->age);
return 0;
}

4.    #include<stdio.h>
int main()
{
struct data
{
 int age;
 char *name;
}var;
struct data *ptr=&var;
char name1[10] ="sachi";
ptr->name=name1;
ptr->age=22;
printf("%s\t",ptr->name);
printf("%d\n",ptr->age);
return 0;
}

5.    #include<stdio.h>
struct student
{
 char name[20]; int age;
};
int main()
{
struct student stu1={"Arati",21},stu2={"Arati",20};      
if(stu1==stu2)
printf("Same\n");
else
printf("Not same\n");
return 0;
}

6.    #include<stdio.h>
void func (struct tag v);
int main()
{
struct tag
{
int i; char c;
};
struct tag var= {2,'s'};    
func(var);
return 0;
}
void func(struct tag v)
{
 printr("%d %c\n",v.i,v.c);
}

7.    #include<stdio.h>
struct tag
{
 int i; char c;
};
void func(struct tag v )
{
 printf("%d %c\n",v.i,v.c);
}
int main()
{
 struct tag var={2,'s'};
 func(var);
 return 0;
}

8.    #include<stdio.h>
struct tag
 {int i; char c;};
void func(struct tag);
int main() 
{
struct tag var={12,'c'};
func(var) ;
printf("%d\n",var.i);
return 0;
}
void func(struct tag var)
{
 var.i++;
}

9.    #include<stdio.h>
struct tag
{int i; char c;};
void func (struct tag *);
int main() 
{
struct tag var={12,'c'};
func(&var) ;
printf("%d\n",var.i);
return 0;
}
void func (struct tag *ptr)
{
 ptr->i++;
}

10.#include<stdio.h>
#include<string.h>  
int main()
{
union tag
{
 char name [15] ;  int age;
}rec;
strcpy(rec.name, "sss");     
rec.age=23;
printf ("Name-%s",rec.name);
return 0;
}

11.#include<stdio.h>
struct
{
char a[20];int b; 
union
     { 
     double c;
     float d;
     }y;
}z;
int main()
{
 printf ("%u %u\n",sizeof(z.y),sizeof(z));
 return 0;
}

12.#include<stdio.h>
int main()
{
typedef short int s_int;
unsigned s_int var=3;
printf("%u",var);
return 0;
}

13.#include<stdio.h>
typedef struct tag
{ int i; char c; }tag;
int main()  
{
struct tag v1={1,'a'};
printf("%d %c\n",v1.i,v1.c);
return 0;
}

14.    #include<stdio.h>
typedef struct  
 { char name[20]; int age;}stu;
typedef struct
 { int date; node *link;}node;
int main() 
{
stu *p=malloc(sizeof(stu));
node *ptr=malloc(sizeof(node));
p->age=30;   
ptr->data=3;
printf(" %d %d\n",p->age,ptr->data);
return 0;
}


ANSWER


1.      Age=22      Name=sachi
       Age=22     Name=sachi
2.      Ans-compilation error
3.      Ans-Run time error
4.      Ans-sachi               22
5.      Ans-compilation error
6.      Ans-compilation error
7.      Ans-2 s
8.      Ans-12
9.      Ans-13
10.  Ans-Name-Garbage value
11.  Ans -8 32
12.  Ans-compilation error
13.  Ans-1 a
14.  Ans-compilation error


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