#include <stdio.h>
#include <stdlib.h>


struct database {
  int id_number;
  int age;
  float salary;
};

void modify(struct database *thing);

int main()
{
  struct database employee;  /* There is now an employee variable that has
                              modifiable variables inside it.*/
  
  employee.age = 22;
  employee.id_number = 1;
  employee.salary = 12000.21;

  printf("age: %d\n", employee.age);

  modify(&employee);

  printf("age: %d\n", employee.age);

  return 0;
}

void modify(struct database *thing)
{
	thing->age=23;
}