5_3.cpp

用VC编写的股票交易系统

/*第3题	股票交易系统--源代码及关键源代码注解如下：*/
#include <iostream.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#include <fstream.h>
#include <iomanip.h>
#define MAX 5
class Stock
{
	friend class Customer;
	private:
			 char stock_name[20];
			 char stock_code[6];
			 char code_for_analysis[6];
			 char choice;
			 int num_of_stock;
			 long int stock_volume;
			 long int volume_available;
	public:
			 Stock();
			 void Interface();
			 void Stock_Exchange_Market();
			 void Switch_choice();
			 void Input_For_New_Stock();
			 void Market_Analysis();
};
class Customer
{
	private:
			 char customer_name[30];
			 char password[10];
		     char share_holding_name[30];
			 char share_holding_code[5];
			 long int share_holding_value;
	public:
			 Customer();
			 void Log_in(char * ,Customer) const;
			 void Register(Customer *);
			 void Stock_Portfolio(Customer) const; // Portfolio--有价证券
			 void Switch_function();
		

};
Customer::Customer()
{
	strcpy(Customer::customer_name," ");
	strcpy(Customer::share_holding_name," ");
	strcpy(Customer::share_holding_code," ");
	share_holding_value=0;
}
void Customer::Log_in(char *password,Customer cust) const
{
	ifstream read_customer("customer.dat");
	while(!read_customer.eof())
	{
		read_customer.read((char*)(&cust),sizeof(cust));
		if(read_customer.fail())
		{
			cout<<"No record at all!";
			break;
		}
		if(strcmp(password,cust.password)==0)
			Stock_Portfolio(cust);
	}
	read_customer.close();
}
void Customer::Register(Customer *cust)
{
	system("cls"); //执行系统命令：清屏=cls
	cin.get();
	cout<<"Welcome to ********************* Stock Exchange System"<<endl;
	cout<<"~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
	cout<<"Enter user name: ";
	cin.getline(customer_name,30);
	cout<<"Enter your own password(less than 8 words): ";
	cin>>password;
	cin.get();
	system("cls");
	cout<<endl<<endl;
	cout<<"Your account have been registered..."<<endl;
	cout<<"Press any key to proceed..."<<endl;
	getch();
}
void Customer::Stock_Portfolio(Customer cust) const
{
	Stock share[MAX],temp;
	Customer s[MAX];
	int i;	
	char ch,share_code[6];
	long int volume;
start:
	system("cls");
	cout<<endl<<endl;
	cout<<"\t\t\t     Welcome Back!!!!!"<<endl;
	cout<<"\t\t******************** Stock Exchange System"<<endl;
	cout<<"\t\t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
	cout<<"\t\t User: "<<cust.customer_name<<endl<<endl;
	cout<<"\t\t Buy Shares..........................[b]"<<endl;
	cout<<"\t\t Sell Shares.........................[s]"<<endl;
	cout<<"\t\t View PortFolio......................[p]"<<endl;
	cout<<"\t\t Log Out.............................[l]"<<endl;
	cout<<endl<<"\t\t Enter your choice: ";
	cin>>ch;
	if((ch!='p')&&(ch!='b')&&(ch!='s')&&(ch!='l'))
		goto start;
	else
	{
	switch(ch)
	{
	 case 'b':{
			system("cls");
			cout<<"\n\n\t\t******************* Stock Exchange System"<<endl;
cout<<"\t\t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
			cout<<"  Company\t\tCode\tIssued Volume\tVolume Available"<<endl;
			cout<<"  ~~~~~~~\t\t~~~~\t~~~~~~~~~~~~~\t~~~~~~~~~~~~~~~~\t"<<endl;			
ifstream dataFile("Stock_File.dat");  //Subject to change
			dataFile.read((char*)(&share),sizeof(share));
			ifstream dataFile_for_share(cust.customer_name);  //Subject to change
			dataFile_for_share.read((char*)(&s),sizeof(s));	// open file for s[x]
						for(i=0;i<MAX;++i)
						{
							share[i].Stock_Exchange_Market();
						}
						cin.get();
						cout<<endl<<"Enter the Company's code you want to purchase: ";
						cin.getline(share_code,6);
						cout<<"Enter the volume to purchase: ";
						cin>>volume;
						cin.get();
						i=0;
						while((strcmp(share[i].stock_code,share_code)==0) || (i<MAX))
						{
						if(strcmp(share[i].stock_code,share_code)==0)
							{
	    						if(share[i].volume_available>volume)
								{
	s[i].share_holding_value=s[i].share_holding_value+volume;   // cust change to s[x]
strncpy(s[i].share_holding_name,share[i].stock_name,30); // cust change to s[x]
	strcpy(s[i].share_holding_code,share[i].stock_code); // cust change to s[x]
	share[i].volume_available=share[i].volume_available-volume;
					ofstream dataFile	(cust.customer_name,ios::binary); //Subject to change
									for(i=0;i<5;++i)
									{
										dataFile.write((char*)(&s[i]),sizeof(s[i]));
									} // create or save file for all transactions
									ofstream file("Stock_File.dat");
									for(i=0;i<5;++i)
									{
										file.write((char*)(&share[i]),sizeof(share[i]));
									}

									break;
								}
								else
								{
									cout<<"Volume available for "<<share[i].stock_name
<<" is less than the volume you want to purchase. "<<endl;
									cout<<"Transaction cancel... ";
									getch();
									break;
								}
							}
							else
							{
								i++;
								while(i==MAX)
								{
								cout<<"The code you type may be wrong... "<<endl;
								cout<<"Transaction cancel... ";
									getch();
									break;
								}
							}
						}
						break;
					 }
			case 's':{
				system("cls");
			    ifstream dataFile_for_share(cust.customer_name);  //Subject to change
			    dataFile_for_share.read((char*)(&s),sizeof(s));	// open file for s[x]
				ifstream dataFile("Stock_File.dat");  //Subject to change
				dataFile.read((char*)(&share),sizeof(share));
				cout<<"\t\t******************** Stock Exchange System"<<endl;
						cout<<"\t\t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
						cout<<"  Company\t\tCode\tVolume Holding"<<endl;
						cout<<"  ~~~~~~~\t\t~~~~\t~~~~~~~~~~~~~~\t"<<endl;	
						for(int i=0;i<MAX;i++)
						{
		    	cout<<"  "<<s[i].share_holding_name<<"\t\t"<<s[i].share_holding_code
<<"\t"<<s[i].share_holding_value<<endl;
						}
						cin.get();
						cout<<endl<<"Enter share code to sell: ";
						cin.getline(share_code,6);
						cout<<"Enter the volume to sell: ";
						cin>>volume;
						cin.get();
						i=0;
						
						while((strcmp(share[i].stock_code,share_code)==0) || (i<MAX))
						{
							if(strcmp(share[i].stock_code,share_code)==0)
							{
								if(s[i].share_holding_value>volume)
								{
	s[i].share_holding_value=s[i].share_holding_value-volume;
// cust change to s[x]
	share[i].volume_available=share[i].volume_available+volume;
	ofstream data(cust.customer_name,ios::binary); //Subject to change
									for(i=0;i<5;++i)
									{
										data.write((char*)(&s[i]),sizeof(s[i]));
									} // create or save file for all transactions
									ofstream file("Stock_File.dat");
									for(i=0;i<5;++i)
									{
										file.write((char*)(&share[i]),sizeof(share[i]));
									}
								}
								else
								{
	                           cout<<"You don have so much volume to sell, ";
						       cout<<"or you did not buy this share before. "<<endl;
									cout<<"Transaction cancel... "<<endl;
									break;
								}
							}
							else
							{
								i++;
								while(i==MAX)
								{
cout<<"You did not buy this share or you have type in wrong share code. "<<endl;
								cout<<"Transcation cancel... ";
									break;
							}
							}
						}
						getch();
						break;
					 }
			case 'p':{	
				system("cls");
		         ifstream dataFile_for_share(cust.customer_name);  //Subject to change
				dataFile_for_share.read((char*)(&s),sizeof(s));	// open file for s[x]
				cout<<"\t\t******************** Stock Exchange System"<<endl;
	    	cout<<"\t\t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
				cout<<"  Company\t\tCode\tVolume Holding"<<endl;
				cout<<"  ~~~~~~~\t\t~~~~\t~~~~~~~~~~~~~~\t"<<endl;	
				for(int i=0;i<MAX;i++)
		     		{
				cout<<"  "<<s[i].share_holding_name<<"\t\t"<<s[i].share_holding_code
<<"\t"<<s[i].share_holding_value<<endl;
						}
						getch();
						break;
					 }
			case 'l':{
						Stock s;
						s.Interface();
					 }
		}
		goto start;
	}
}
Stock::Stock()
{
	num_of_stock=0;