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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
struct point {
int x;
int y;
};
typedef struct point point;
struct rec {
point bg;
point hd;
};
struct cer {
point cen;
unsigned char r;
};
struct tri {
point pa;
point pb;
point pc;
};
typedef struct cer cercle;
typedef struct tri triangle;
typedef struct rec rectangle;
enum type {REC, CER, TRI};
union element {
rectangle * rec;
cercle * cer;
triangle * tri;
};
typedef union element ele;
struct fig {
enum type typele;
ele element;
struct fig * suivant;
};
typedef struct fig fig;
fig * cons(ele element, enum type tf) {
fig * figure = NULL;
figure = malloc(sizeof(*figure));
if (figure) {
figure->suivant = NULL;
if (element.rec) {
size_t greaterSize = (sizeof(triangle) > sizeof(cercle) ) ? sizeof(triangle) : sizeof(cercle);
greaterSize = (sizeof(rectangle) < greaterSize) ? sizeof(rectangle) : greaterSize;
figure->element.rec = malloc(sizeof(greaterSize));
if (figure->element.rec) {
memcpy(figure->element.rec, element.rec, greaterSize);
if (tf == REC || tf == CER || tf == TRI) {
figure->typele = tf;
}
else {
free(figure), figure = NULL;
}
}
else {
free(figure), figure = NULL;
}
}
else {
free(figure), figure = NULL;
}
}
return figure;
}
int main(void) {
rectangle rect = { {0,1} , {2,4} };
ele elRect;
elRect.rec = ▭
fig * figure = cons(elRect, REC);
if (figure) {
printf("rec:(%d,%d) (%d,%d)\n",
figure->element.rec->bg.x,
figure->element.rec->bg.y,
figure->element.rec->hd.x,
figure->element.rec->hd.y);
free(figure), figure = NULL;
}
return 0;
} |
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