Created
July 26, 2017 00:30
-
-
Save echiesse/97ea3552b4a6d1a89ed1de6805d80199 to your computer and use it in GitHub Desktop.
Example of structure encapsulation in C
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* pair.h */ | |
#ifndef __PAIR_H__ | |
#define __PAIR_H__ | |
typedef struct SPair Pair; | |
Pair* createPair(int x, int y); | |
void destroyPair(Pair *pair); | |
int getX(Pair *pair); | |
#endif //** __PAIR_H__ ** | |
//******************************************************************************* | |
/* pair.c */ | |
#include <stdlib.h> | |
#include "pair.h" | |
struct SPair | |
{ | |
int x; | |
int y; | |
}; | |
Pair *createPair(int x, int y) | |
{ | |
Pair *p = malloc(sizeof(Pair)); | |
p->x = x; | |
p->y = y; | |
return p; | |
} | |
int getX(Pair *p) | |
{ | |
return p->x; | |
} | |
void destroyPair(Pair *p) | |
{ | |
free(p); | |
} | |
//******************************************************************************* | |
/* program.c */ | |
#include <stdio.h> | |
#include "pair.h" | |
int main() | |
{ | |
Pair *a = createPair(1, 2); | |
printf("x = %i\n", a->x); // Ilegal access | |
printf("x = %i\n", getX(a)); // This is ok ! | |
destroyPair(a); | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment