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’

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