C Programming - Const - Discussion

#include<stdio.h>
#include<stdlib.h>
int fun(const union employee *e);

union employee
{
    char name[15];
    int age;
    float salary;
};
const union employee e1;

int main()
{
    strcpy(e1.name, "A");
    fun(&e1);
    printf("%s %d %f", e1.name, e1.age, e1.salary);
    return 0;
}
int fun(const union employee *e)
{
    strcpy((*e).name, "B");
    return 0;
}