74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
#include <stdio.h>
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
struct Person {
|
|
char *name;
|
|
int age;
|
|
int height;
|
|
int weight;
|
|
};
|
|
|
|
struct Person *Person_create(char *name, int age, int height, int weight)
|
|
{
|
|
struct Person *who = malloc(sizeof(struct Person));
|
|
assert(who != NULL);
|
|
|
|
who->name = strdup(name);
|
|
who->age = age;
|
|
who->height = height;
|
|
who->weight = weight;
|
|
|
|
return who;
|
|
}
|
|
|
|
void Person_destroy(struct Person *who)
|
|
{
|
|
assert(who != NULL);
|
|
|
|
free(who->name);
|
|
free(who);
|
|
}
|
|
|
|
void Person_print(struct Person *who)
|
|
{
|
|
printf("Name: %s\n", who->name);
|
|
printf("\tAge: %d\n", who->age);
|
|
printf("\tHeight: %d\n", who->height);
|
|
printf("\tWeight: %d\n", who->weight);
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
// make two people structures
|
|
struct Person *joe = Person_create(
|
|
"Joe Alex", 32, 64, 140);
|
|
|
|
struct Person *frank = Person_create(
|
|
"Frank Blank", 20, 72, 180);
|
|
|
|
// print them out and where they are in memory
|
|
printf("Joe is at memory location %p:\n", joe);
|
|
Person_print(joe);
|
|
|
|
printf("Frank is at memory location %p:\n", frank);
|
|
Person_print(frank);
|
|
|
|
// make everyone age 20 years and print them again
|
|
joe->age += 20;
|
|
joe->height -= 2;
|
|
joe->weight += 40;
|
|
Person_print(joe);
|
|
|
|
frank->age += 20;
|
|
frank->weight += 20;
|
|
Person_print(frank);
|
|
|
|
// destroy them both so we clean up
|
|
Person_destroy(joe);
|
|
Person_destroy(frank);
|
|
|
|
return 0;
|
|
}
|