#include <stdio.h>
#include <stdlib.h>

struct structure {
    int a;
    int b;
};

struct structure_mixte {
    char a;
    int b;
};

int main(){
    // simple
    int val = 15;
    int* ad = &val;
    *ad = 16;
    printf("%d\n", val);

    // structures
    printf("taille : %d\n", sizeof(struct structure));
    struct structure* s = malloc(sizeof(struct structure));
    s->a = 17;
    s->b = 18;
    ad   = (int*) s;
    printf(" ad %d\n", *ad);
    ad = ad + 1;
    printf("ad +1 %d\n", *ad);

    // structures mixtes
    printf("taille : %d\n", sizeof(struct structure_mixte));
    struct structure_mixte* m = malloc(sizeof(struct structure_mixte));
    m->a = 'a';
    m->b = 19;
    ad   = (char*) m;
    printf("ad %c\n", *(char*)ad);
    ad = (char*) ad + 1;
    printf("ad +1 %d\n", *ad);
    ad = (char*) ad + 3;
    printf("ad +3 %d\n", *ad);
    ad = (int*) m;
    *ad = 20;
    printf("%d\n", *ad);

    // Jouer avec les adresses
    int* a = malloc(4);
    *a = 1;
    int* b = &a;
    **( int** ) b = 2;
    printf("%d\n", *a);
    free(( void* ) * ( void** ) b);

    // comprendre les tableaux
    a = malloc(8);
    *a = 5;
    b = a + 1;
    *b = 6;
    printf("%d\n", *a);
    printf("%d\n", *b);

    // comprendre le déférencement
    char *c = (char*) a + 1;
    *c = 'a';
    printf("%d\n", *a);
    printf("%c\n", *c);
    *a = 5;
    printf("%d\n", *a);
    free(a);
}