c++实现中介者模式--虚拟聊天室
内容：
在“虚拟聊天室”实例中增加一个新的具体聊天室类和一个新的具体会员类，要求如下：
1. 新的具体聊天室中发送的图片大小不得超过20M。
2. 新的具体聊天室中发送的文字长度不得超过100个字符。
3. 新的具体会员类可以发送图片信息和文本信息。
4. 新的具体会员类在发送文本信息时，可以在信息后加上时间。
修改客户端测试类，注意原有系统类代码和客户端代码的修改。
代码：
#include<iostream> #include<map> #include<ctime> #include<sstream> using namespace std; class AbstractChatroom; string m_replace(string strSrc,const string &oldStr, const string &newStr,int count=-1) { string strRet=strSrc; size_t pos = 0; int l_count=0; if(-1 == count) //替换所有 count = strRet.size(); while ((pos = strRet.find(oldStr, pos)) != string::npos) { strRet.replace(pos, oldStr.size(), newStr); if(++l_count >= count) break; pos += newStr.size(); } return strRet; } class Member { protected : AbstractChatroom *chatroom; string name; public: Member(string name) { this->name=name; } AbstractChatroom* getChatroom() { return chatroom; } void setChatroom(AbstractChatroom *chatroom) { this->chatroom = chatroom; } string getName() { return name; } void setName(string name) { this->name = name; } virtual void sendText(string to,string message)=0; virtual void sendImage(string to,string image)=0; void receiveText(string from,string message) { cout<<from<<"发送文本给"<<this->name<<"，内容为："<<message<<endl; } void receiveImage(string from,string image) { cout<<from<<"发送图片给"<<this->name<<"，内容为："<<image<<endl; } }; class AbstractChatroom { public: virtual void registers(Member *member)=0; virtual void sendText(string from,string to,string message)=0; virtual void sendImage(string from,string to,string image)=0; }; class ChatGroup: public AbstractChatroom{ private: map<string, Member*> members; map<string, Member*>::iterator iter; public: void registers(Member *member) { iter=members.find(member->getName()); if(iter==members.end()) { members.insert(map<string, Member*>::value_type(member->getName(),member)); member->setChatroom(this); } } void sendText(string from, string to, string message) { Member *member=members.find(to)->second; string newMessage=message; newMessage=m_replace(message,"日", "*"); member->receiveText(from, newMessage); } void sendImage(string from, string to, string image) { Member *member= members.find(to)->second; if(image.length()>5) { cout<<"图片太大，发送失败"<<endl; } else { member->receiveImage(from, image); } } }; class NewChat:public AbstractChatroom{ private: map<string, Member*> members; map<string, Member*>::iterator iter; public: void registers(Member *member) { iter=members.find(member->getName()); if(iter==members.end()) { members.insert(map<string, Member*>::value_type(member->getName(),member)); member->setChatroom(this); } } void sendText(string from, string to, string message) { Member *member=members.find(to)->second; string newMessage=message; newMessage=m_replace(message,"日", "*"); if(message.length()>100) { cout<<"发送的文字长度不得超过100个字符,发送失败"<<endl; } else { member->receiveText(from, newMessage); } } void sendImage(string from, string to, string image) { Member *member=members.find(to)->second; if(image.length()>20) { cout<<"图片大小不得超过20M，发送失败"<<endl; } else { member->receiveImage(from, image); } } }; class CommonMember :public Member{ protected : string name; public: CommonMember(string name):Member(name) { this->name=name; } void sendText(string to, string message) { cout<<"普通会员发送消息:"<<endl; chatroom->sendText(this->name, to, message); } void sendImage(string to, string image) { cout<<"普通会员不能发送图片！"<<endl; } }; class DiamondMember :public Member{ protected : string name; public: DiamondMember(string name):Member(name){ this->name=name; } void sendText(string to, string message) { cout<<"钻石会员发送消息:"<<endl; chatroom->sendText(name,to, message); } void sendImage(string to, string image) { cout<<"钻石会员发送图片:"<<endl; chatroom->sendImage(name, to, image); } }; class CrownMember :public Member{ protected : string name; public: CrownMember(string name):Member(name){ this->name=name; } void sendText(string to, string message) { time_t now = time(NULL); tm* t = localtime(&now); // 将信息输出到字符串流 stringstream ss; stringstream ss2; ss << t->tm_year + 1900 << "." << t->tm_mon + 1 << "." << t->tm_mday << ".." << t->tm_hour << "." << t->tm_min << "." << t->tm_sec; cout<<"皇冠会员发送消息:"<<endl; chatroom->sendText(name,to,message+" 现在时间"+ss.str()); } void sendImage(string to, string image) { cout<<"皇冠会员发送图片:"<<endl; chatroom->sendImage(name, to, image); } }; int main(){ //AbstractChatroom *happyChat=new ChatGroup(); AbstractChatroom *newChat=new NewChat(); stringstream ss;//生成100个以上的字符 Member *member1,*member2,*member3,*member4,*member5,*member6; member1=new DiamondMember("张三"); member2=new DiamondMember("李四"); member3=new CommonMember("王五"); member4=new CommonMember("小芳"); member5=new CommonMember("小红"); member6=new CrownMember("雨轩"); newChat->registers(member1); newChat->registers(member2); newChat->registers(member3); newChat->registers(member4); newChat->registers(member5); newChat->registers(member6); member1->sendText("李四","李四，你好！"); member2->sendText("张三","张三，你好！"); member1->sendText("李四","今天天气不错，有日！"); member2->sendImage("张三","一个很大很大的太阳"); member2->sendImage("张三","太阳"); member3->sendText("小芳","还有问题吗？"); member3->sendText("小红","还有问题吗？"); member4->sendText("王五","没有了，谢谢！"); member5->sendText("王五","我也没有了！"); member5->sendImage("王五","谢谢"); member6->sendText("王五","今天老师的作业怎么没有完成"); member6->sendImage("王五", ".................................................."); member6->sendText("王五", "今天老师的作业怎么没有完成，你知道老师有多么的容易吗，不知道体谅一下吗"); for(int i=0;i<110;i++) { ss <<"-"; } member6->sendText("王五",ss.str()); }
运行结果：
