Up through lcthw exercise 16

lcthw/ex16.c

@@ -0,0 +1,71 @@
+#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, 100);
+
+	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;
+}