ex16

lcthw-remnants-2/.gitignore

@@ -13,3 +13,4 @@ ex12
 ex13
 ex14
 ex15
+ex16

lcthw-remnants-2/ex16.c

@@ -0,0 +1,73 @@
+#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;
+}