Pointer to union in c programming | CTechnotips

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

Examples of pointers to union:

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’