C :: How To Display Order Of Persons Before And After Sorting By Age

This program I am trying to write has a structure of persons with a first name last name and age for each.

What I need it to do it display the order of the persons before sorting and then display the persons after sorting by age.

So far I have written the overall program but am stuck at the most important step...which is defining the functions that will be doing all of the work.

For sort_by_age I want use bubble sorting by writing the function myself and for print_person_info I am confused on how to print data out of the struct.

Code:

#include <stdio.h>
struct person
{
char first_name[20];
char last_name[20];
int age;
};
void print_person_info(struct person clone);
void sort_by_age(int n, struct person a[]);

[Code]...