reading file to struct

fread((void *)buffer, sizeof(OBJECT), 1, file);
OBJECT* obj;
obj = (OBJECT*) malloc(sizeof(OBJECT));
obj = (OBJECT*) buffer;
obj->c[obj->a] = '\0';
printf("obj->a = %d\n"
    "obj->f = %d \n"
    "obj->c = %s\n",
    obj->a,
    obj->f,
    obj->c);