# include # include class accountprivate: int id; char * name; double balance;public: account(); account(int,const char * ,double); void saving(); int withdraw(); void showme(); int getid();class bankprivate: account * account50; int maxid; int accnum;public: bank(); void append(); void delete(); void query();account:account()id = 0;strcpy(name, );balance = 0;account:account(int id,const char * name,double balance)id = id;name = new char50;strcpy(name,name);balance = balance;void account:saving()double number;coutnumber;balance = balance + number;coutnow the balance of your account is balanceendl;return;int account:withdraw()double number;coutnumber;if(balancenumber) coutsorry,now the balance of your accout is less than number.so you can not withdraw!endl; return 0;balance = balance - number;coutnow the balance of your account isbalanceendl;return 1;void account:showme()coutaccount id:idendl;coutname:nameendl;coutbalance:balanceendl;return;int account:getid()return id;bank:bank()for(int i=0;i50;i+) accounti = null;maxid = 0;accnum = 0;void bank:append()if(accnum = 50) coutsorry,the bank is full,so can not add new account!endl; return;int id;char * name = new char50;double balance;coutname;id = maxid;balance = 0;account * acc = new account(id,name,balance);accountaccnum = acc;coutappend successful!endlshowme();maxid+;accnum+;return;void bank:delete()int id;coutid;int flag = 1;int i = 0;while(igetid() /flag = 0 indicate had found the accountid flag = 0; else i+; if(flag) coutthe account does not exists!endlendl; return; for(int j=i;jaccnum;j+) accountj = accountj+1;delete accountaccnum-1;accnum-;coutdelete successful!endlendl;return;void bank:query()int id;coutid;int flag = 1;int i=0;while(igetid() flag = 0; else i+; if(flag) coutthe account does not exist!endlshowme();int choice =0;while(choice!=3) cout 1:save moneyendl; cout 2:withdraw moneyendl; cout 3:returnendl; coutchoice; coutsaving(); break; case 2: accounti-withdraw(); break; case 3: break; return;void main()bank bank;int choice = 0;coutwelcome to bank systemendl;while(choice != 4) cout1: add an accountendl; cout2: delete an accountendl; cout3: query an accountendl; cout4: exitendlendl; coutplease input your choice:; coutchoice; switch(choice) ca