#include <stdio.h>
// Bonus Question

struct s_Employee {
    char name[50];
    int id;
    double hourly_salary;
    int hours_worked;
};
union u_Employee {
    char name[50];
    int id;
    double hourly_salary;
    int hours_worked;
};


int main() {
    // First to print the size of an int, double, and char[50] so we can see
    printf("int is %d bytes\n", sizeof(int));
    printf("double is %d bytes\n", sizeof(double));
    printf("string of 50 length is %d bytes\n", sizeof(char[50]));

    /* int is 4 bytes
     * double is 8 bytes
     * char[50] is 50 bytes
     *
     * Employee has 1 char[50], 2 ints, and 1 double
     * All of these added up equal 66
     * The largest of the all is char[50] at 50 bytes
     *
     */


    printf("Size of Struct employee: %d bytes\n", sizeof(struct s_Employee));
    printf("Size of Union employee: %d bytes\n\n", sizeof(union u_Employee));

    /* We see that the struct came out to 72 bytes, and the union came out to 66 bytes
     * The struct's size is the sum of all its members, +6 bytes from the compiler for memory padding
     * The unions size is just the size of its largest member, +6 bytes from the compiler for memory padding
     */

    /* Thus, the struct should be able to assign and keep values for all its members
     * The union can only hold one, as all members share memory
     */

    // All the members of the struct will be assigned and are accessible together
    struct s_Employee s_employee = {"John doe", 12345, 15.00, 8};
    printf("Name: %s\n", s_employee.name);
    printf("id: %d\n", s_employee.id);
    printf("Salary: %0.02f\n", s_employee.hourly_salary);
    printf("Hours worked: %d\n", s_employee.hours_worked);

    // Only one member of the union can be assigned at a time
    union u_Employee u_employee;
    u_employee.id = 12345;
    printf("id: %d\n\n", u_employee.id);
    u_employee.hourly_salary = 15.00; // Now id is overwritten
    printf("Salary: %0.02f\n", u_employee.hourly_salary);
    printf("id: %d\n", u_employee.id); // Prints 0



    return 0;
}