#include <stdio.h>
#include <string.h>

int main()
{
	struct person
	{
		char name[50];
		int age;
		union 
		{
			struct
			{
				char game[25];
				int jersey_number;
			} sports;
			struct
			{
				char instrument[25];
				int years_practice;
			} music;
			struct
			{
				int hours_week;
			} television;
		} hobby;
	};
	struct person a;
	struct person b;
	struct person c;

	strcpy(a.name,"Alex");
	a.age = 17;
	strcpy(a.hobby.music.instrument,"Guitar");
	a.hobby.music.years_practice = 4;

	strcpy(b.name,"Jerry");
	b.age = 22;
	strcpy(b.hobby.sports.game,"Football");
	b.hobby.sports.jersey_number = 66;

	strcpy(c.name,"April");
	c.age = 37;
	c.hobby.television.hours_week = 60;
	
	printf("Person A is %s, who is %d years old.\n",a.name,a.age);
	printf("A has played %s for %d years.\n\n",a.hobby.music.instrument,\
			a.hobby.music.years_practice);
	printf("Person B is %s, who is %d years old.\n",b.name,b.age);
	printf("B has plays %s and is number %d.\n\n",b.hobby.sports.game,\
			b.hobby.sports.jersey_number);
	printf("Person C is %s, who is %d years old.\n",c.name,c.age);
	printf("C watches TV %d hours a week.\n",c.hobby.television.hours_week);
	
	return(0);
}