복습

#include "pch.h"
#include <iostream>
struct APPLE {
 short *color;
};
int main()
{
 //apple이 color제어
 APPLE *apple;
 apple = new APPLE;//메모리 생성
 apple->color = new short;//메모리 생성
 *apple->color = 10;
 printf("%d %d\n", apple->color, *apple->color);//주소, 값
 delete apple->color;//
 apple = new APPLE;
 apple->color = new short[3];//
 apple->color[0] = 20;
 apple->color[1] = 30;
 apple->color[2] = 40;//
 printf("%d %d %d %d\n", apple->color, apple->color[0], apple->color[1], apple->color[2]);
 delete[] apple->color;
 delete apple;

 //3 1//2 3//color가 apple

 apple = new APPLE[3];
 apple[0].color = new short;
 apple[1].color = new short;
 apple[2].color = new short;
 *apple[0].color = 10;
 *apple[1].color = 10;
 *apple[2].color = 10;
 printf("%d %d %d %d %d %d %d \n", apple->color, *apple[0].color, *apple[1].color, *apple[2].color, &apple[0].color, &apple[1].color, &apple[2].color);
 delete apple[0].color;
 delete apple[1].color;
 delete apple[2].color;
 delete[] apple;

 apple = new APPLE[2];
 apple[0].color = new short[3];
 apple[1].color = new short[5];
 apple[0].color[0] = 10;
 apple[0].color[1] = 20;
 apple[0].color[2] = 30;
 apple[1].color[0] = 40;
 apple[1].color[1] = 50;
 apple[1].color[2] = 60;

 printf("%d %d %d %d %d %d %d\n", apple, apple[0].color[0], apple[0].color[1], apple[0].color[2], apple[1].color[0], apple[1].color[1], apple[1].color[2]);
 printf("%d %d %d %d %d %d %d\n", apple, &apple[0].color[0], &apple[0].color[1], &apple[0].color[2], &apple[1].color[0], &apple[1].color[1], &apple[1].color[2]);
 delete[] apple[0].color;
 delete[] apple[1].color;
 delete[] apple;

}

 

 

 

 

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#include "pch.h"
#include <iostream>
struct APPLE{
 long *c;
};
struct BANANA {
 //short a;
 //long b[10];
 //char *c;
 APPLE *a;
 
};
struct ORANGE {
 //short a;
 //long b[10];
 //char *c;
 BANANA *b;//다른 구조체 사용가능
};
int main()
{ /*
 ORANGE orange;
 orange.banana.apple.color = 10;
 //orange.banana.apple = 10;//type에 맞게 줘야된다.
 printf("%d\n", orange.banana.apple.color);//값
 printf("%d\n", &orange.banana.apple.color);//주소
 */
 //1113//1311
 /*
 ORANGE *o;
 o = new ORANGE;
 o->b = new BANANA;
 o->b->a = new APPLE;
 o->b->a->c = new long[3];//3개할당
 o->b->a->c[0] = 10;
 o->b->a->c[1] = 20;
 o->b->a->c[2] = 30;
 printf("%d %d\n", o->b->a->c[0], &o->b->a->c[0]);
 printf("%d %d\n", o->b->a->c[1], &o->b->a->c[1]);
 printf("%d %d\n", o->b->a->c[2], &o->b->a->c[2]);
 //메모리 해제할때 c를 해제해버리면 다른거 해제못함(순서대로)
 delete[] o->b->a->c;
 delete o->b->a;
 delete o->b;
 delete o;
 */
 ORANGE *o;
 o = new ORANGE;
 o->b = new BANANA[3];
 o->b[0].a = new APPLE;
 o->b[1].a = new APPLE;
 o->b[2].a = new APPLE;

 o->b[0].a->c = new long;
 o->b[1].a->c = new long;
 o->b[2].a->c = new long;

 *o->b[0].a->c = 10;// *을 앞으로 c []에대한 - *붙이면 값
 *o->b[1].a->c = 20;
 *o->b[2].a->c = 30;

 printf("%d %d\n", *o->b[0].a->c, &o->b[0].a->c);
 printf("%d %d\n", *o->b[1].a->c, &o->b[1].a->c);
 printf("%d %d\n", *o->b[2].a->c, &o->b[2].a->c);

 delete[] o->b[0].a->c;
 delete[] o->b[1].a->c;
 delete[] o->b[2].a->c;

 delete o->b[0].a;
 delete o->b[1].a;
 delete o->b[2].a;

 delete[] o->b;
 delete o;
}

  //3133
  //o[].b->a[]->c[]
  //3111
  //o[].b->a->c;

 

 

 

 

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