/*
    structs_1.c
    create a struct definition
    declare, initialize and print an automatic struct variable
    use of the . notation
*/

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

typedef struct {
    char *name;
    int  age;
} Person;  /* Person is now a data type */

void changeAge2(Person *p)
{
    printf("New age? ");
    scanf("%d", &p->age);
    printf("name= %s, age= %d\n", (*p).name, p->age);
}

void changeAge(int *age)
{
    printf("New age? ");
    scanf("%d", age);
}

int changeAge3()
{int age;

    printf("New age? ");
    scanf("%d", &age);

    return age;
}

int main(int argc, char *argv[])
{
    Person p;
    
    p.name = (char *)malloc((strlen("Mark Stehlik") + 1) * sizeof(char));
    strcpy(p.name, "Mark Stehlik");
    p.age = 47;
    printf("name= %s, age= %d\n", p.name, p.age);

/*    changeAge(&p); */
    p.age = changeAge3();

    printf("name= %s, age= %d\n", p.name, p.age);
    return 0;
}