90 lines
1.3 KiB
C
90 lines
1.3 KiB
C
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#ifndef __DEMO_H__
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#define __DEMO_H__
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#ifndef __DEMO_H__
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// ǰ<><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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class Memento;
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// ԭ<><D4AD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>ʵ<EFBFBD><CAB5>
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class Originator
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{
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public:
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Originator(){
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state = "";
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}
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Originator(String iState){
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state = iState;
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}
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD>
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Memento* createMemento(){
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return new Memento(this);
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}
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// <20><><EFBFBD>ñ<EFBFBD><C3B1><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>ԭ<EFBFBD><D4AD><EFBFBD><EFBFBD>״̬
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void restoreMemento(Memento* m){
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state = m->getState();
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}
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void setState(string iState){
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state = iState;
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}
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string getState(){
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return state;
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}
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private:
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string state;
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};
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// <20><><EFBFBD><EFBFBD>¼ <20><><EFBFBD><EFBFBD>ʵ<EFBFBD>֣<EFBFBD><D6A3><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><D4AD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD>
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class Memento
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{
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public:
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Memento(){
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state = "";
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}
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Memento(Originator* o){
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state = o->getState();
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}
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void setState(String iState){
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state = iState;
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}
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string getState(){
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return state;
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}
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private:
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String state;
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};
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>ʵ<EFBFBD><CAB5>
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class Caretaker
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{
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public:
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Caretaker(){}
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Memento* getMemento(){
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return memento;
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}
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void setMemento(Memento *m){
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memento = m;
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}
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private:
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Memento* memento;
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};
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// <20>ͻ<EFBFBD><CDBB><EFBFBD> ʾ<><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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int main()
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{
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// <20><><EFBFBD><EFBFBD>ԭ<EFBFBD><D4AD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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Originator o = new Originator("״̬1");
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˶<EFBFBD><CBB6><EFBFBD>
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Caretaker *c = new Caretaker();
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c->setMemento(o->createMemento());
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o->setState("״̬2");
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// <20>Ӹ<EFBFBD><D3B8><EFBFBD><EFBFBD>˶<EFBFBD><CBB6><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>ֳ<EFBFBD><D6B3><EFBFBD>
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o->restoreMemento(c->getMemento());
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return 0;
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}
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#endif
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#endif // __DEMO_H__
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