Tin i cng A2 (Lp trnh C++)
Lp trnh C++ nng cao
LP TRNH C++ NNG CAO
Chng I: C bn v OOP Xy dng lp c bn
1.1. Phng thc khi to - xy dng (Constructor):a. c im chung: Cng
tn vi tn lp Khng c gi tr tr v Gi 1 ln duy nht, khi i tng c khi tob.
Phn loi: i. Phng thc khi to mc nh (default constructor) Khng c tham
sii. Phng thc khi to sao chp (copy constructor) C tham s l i tng ca
chnh lp iii. Phng thc khi to c tham sc. V
d:123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354phanso.h#ifndef
__PHANSO_H__#define __PHANSO_H__class CPhanSo(){private: int m_Tu,
m_Mau;public:// Khai bo cc phng thc khi to CPhanSo(); //Default
constructor CPhanSo(int t, int m); //constructor c tham s
CPhanSo(const CPhanSo & p); //Copy
constructor};#endifphanso.cpp#include phanso.h//nh ngha cc phng thc
khi toCPhanSo::CPhanSo(){ m_Tu = 0; m_Mau = 1;}CPhanSo::CPhanSo(int
t, int m){ m_Tu = t; m_Mau = m;}CPhanSo::CPhanSo(const CPhanSo&
p){ m_Tu = p.m_Tu; m_Mau = p.m_Mau;}ct_chinh.cpp#include #include
#include phanso.husing namespace std;
int main(){ CPhanSo p1; //gi phng thc khi to mc nh //khi gi tr
ban u 2 thuc tnh ca p1 l: // m_Tu = 0 v m_Mau = 1
CPhanSo p2 (2,3); //gi phng thc khi to c tham s //khi gi tr ban
u 2 thuc tnh ca p2 l: // m_Tu = 2 v m_Mau = 3
CPhanSo p3 (p2); //gi phng thc khi to sao chp //khi gi tr ban u
2 thuc tnh ca p3 s // bng gi tr ca p2
getch(); //Dng mn hnh return 0;}
1.2. Phng thc hy (Destructor):a. c im chung: Cng tn vi tn lp,
khng c tham s Khng c gi tr tr v C du ng (~) t pha trc tn phng thc
Gi mt ln duy nht, t ng gi khi i tng b hy Thng c s dng khi cn thu hi
vng nh ca cc thuc tnh l con trb. V
d:phanso.hphanso.cppct_chinh.cpp
class CPhanSo{//.public: ~CPhanSo();}CPhanSo::~CPhanSo(){
cout
