-
Notifications
You must be signed in to change notification settings - Fork 0
/
object_c?.c
92 lines (70 loc) · 2.12 KB
/
object_c?.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
//new header files what does each give you
//malloc, assert, free, main, functions that u dont know
//remember about man 2 or man 3 function
//Write a comment for every single line explaning what it does in English
//Trace through each function and variable so u know where it comes from in the program
//Look up any symbol you dont understand
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
struct Person { //why is it a pointer
//structure name Person, a junk of ram so I can have these in 1 block, these charactersistics point to the same person
char name;
int age;
int height;
int weight;
};
//look into malloc, assert, who, string duplicate
//memory allocator, this line give a junk of ram
struct Person *Person_create(char *name, int age, int height, int weight)
{
struct Person *who = malloc(sizeof(struct Person));
assert( who l = NULL);
//who.name-access name in object who-java
//who-: access who pointer- C lang
//(*who).name - C lang, when not pointer, can use the dot
who -> name = strdup(name);
who -> age = age;
who -> height = height;
who-> weight = weight;
return who;
}
//look into free
void Person_destroy( struct Person *who)
{
assert(who l = NULL);
free(who -> name);
free(who);
}
void Person_print (struct Person *who)
{
printf("Name: %s\n", who->name);
printf("Age: %d\n", who->age);
printf("Height: %d\n", who->height);
printf("Weight: %d\n", who->weight);
}
//explain what main does here
int main(int argc, char *argv[]){
//make two people structures
struct Person *joe = Person_create("Joe Alex", 32, 53, 140);
struct Person *frank = Person_create("Frank Blank", 20, 72, 180);
//print these 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 yrs and print them again
joe->age +=20;
joe->height -=2;
joe->weight +=40;
Person_print(joe);
frank->age +=20;
//frank->height +=40;
frank->weight +=40;
Person_print(frank);
//destroy both so we cna clean up
Person_destroy(joe);
Person_destroy(frank);
return 0;
}