... [(20,40)(40,60) Hello]Chương trình 1Rectangle: [(0,0)(50,100)]Square: [(0,0)(50,50)]Textbox: [(0,0)(10,10) Hello]Chương trình 24© 2004, HOÀNG MINH SƠNChương 7: Quan hệ lớp©2007 AC - HUTBiểu ... viên public của Y và có thểtruy nhập trong Y12© 2004, HOÀNG MINH SƠNChương 7: Quan hệ lớp©2007 AC - HUTChương trình minh họa#include "Rectangle.h"#include "Square.h"#include ... (Unified Modeling Language)Quan hệ dẫnxuấtQuan hệ chứa© 2004, HOÀNG MINH SƠNChương 1Kỹ thuật lập trình 010101010101010110000101010101010101011000010101010101010101100001010101010010101010010101010101001010101001010101010100101010100101101001100011001001001010100110001100100100101010011000110010010010110010110010001000001011001011001000100000101100101100100010000010010101010101010110000101010101010101011000010101010101010101100001010101010010101010010101010101001010101001010101010100101010100101101001100011001001001010100110001100100100101010011000110010010010110010110010001000001011001011001000100000101100101100100010000010010101010101010110000101010101010101011000010101010101010101100001010101010010101010010101010101001010101001010101010100101010100101101001100011001001001010100110001100100100101010011000110010010010110010110010001000001011001011001000100000101100101100100010000010y...