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74 lines
1.4 KiB
74 lines
1.4 KiB
#include <stdio.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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struct Person {
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char *name;
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int age;
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int height;
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int weight;
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};
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struct Person *Person_create(char *name, int age, int height, int weight)
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{
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struct Person *who = malloc(sizeof(struct Person));
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assert(who != NULL);
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who->name = strdup(name);
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who->age = age;
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who->height = height;
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who->weight = weight;
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return who;
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}
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void Person_destroy(struct Person *who)
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{
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assert(who != NULL);
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free(who->name);
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free(who);
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}
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void Person_print(struct Person *who)
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{
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assert(who != NULL);
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printf("Name: %s\n", who->name);
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printf("\tAge: %d\n", who->age);
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printf("\tHeight: %d\n", who->height);
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printf("\tWeight: %d\n", who->weight);
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}
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int main(int argc, char *argv[])
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{
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// make two people structures
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struct Person *joe = Person_create("Joe Alex", 32, 64, 100);
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struct Person *frank = Person_create("Frank Blank", 20, 72, 180);
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// print them out and where they are in memory
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printf("Joe is at memory location %p:\n", joe);
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Person_print(joe);
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printf("Frank is at memory location %p:\n", frank);
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Person_print(frank);
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// make everyone age 20 years and print them again
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joe->age += 20;
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joe->height -= 2;
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joe->weight += 40;
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Person_print(joe);
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frank->age += 20;
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frank->weight += 20;
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Person_print(frank);
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// destroy them both so we clean up
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Person_destroy(joe);
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Person_destroy(frank);
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return 0;
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}
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