C programming Interview questions and answers: Pointer to union in c programming

Pointer to structure: A pointer which is pointing to a structure is know as pointer to structure.

Examples of pointers to structure:

What will be output if you will execute following code?

#include<stdio.h>

union address{

char *name;

char street[10];

int pin;

};

int main(){

union address emp,*p;

emp.name="ja\0pan";

p=&emp;

printf("%s %s",p->name,(*p).name);

return 0;

}

Output: ja ja

Explanation:

p is pointer to union address.

-> and (*). Both are same thing. These operators are used to access data member of union by using union’s pointer.

%s is used to print the string up to null character i.e. ‘\0’

C programming Interview questions and answers