随机点名系统（c++）

      #include "Student.h"
#include <fstream>
#include <iostream>
#include <vector>
#include <ctime>
#include <cstdlib>
#include <string>
#include <conio.h>

using namespace std;

void getFileData(vector<Student> & rInfor);
void getRecord(char * file);

void main()
{
	char* record = "record.txt";
	ofstream fout(record, ios_base::out | ios_base::app);
	vector<Student> infor;	
	int it = 0;
	int choice;

	getFileData(infor);//get data from the file

	srand( time(NULL) );

	while ( 1 )
	{
		cout << "1.开始点名  "
             << "2.显示所有同学点名情况  "
             << "3.清屏  "
             << "4.退出  " << endl;

		while (!((cin >> choice) && choice > 0 && choice < 5))
        {
            cin.clear();
            while (cin.get()!='\n')
            {
                continue;
            }
            
            cout << "你的输入有误，请重新输入！" << endl;            
        }

		switch (choice)
		{
			case 1:
				{
					it = rand() % infor.size();
					infor[it].setTime();
					infor[it].getInformation(cout);

					cout << "是否保存点名? <y or n>";
					
					char temp;
					temp = getch();

					if (temp == 'y' || temp == 'Y')
					{
						cout << temp;
						infor[it].getInformation(fout);
					}
					else
					{
						cout << temp;
					}

					cin.get();

					cout << endl;

					break;
				}
			case 2:
			{
				getRecord(record);

				break;
			}

			case 3:
			{
				system("CLS");

				break;
			}

			case 4:
			{
				exit( 1 );
				
			}
		}
	}
	//it = rand() % infor.size();
	


	fout.close();
}

void getFileData(vector<Student> & rInfor)
{
	char * fileName = "1.txt";

	ifstream fin(fileName, ios_base::out | ios_base::app);

	if (!fin.is_open())
	{
		cerr << "Could not open the file " << fileName << endl;
		exit(EXIT_FAILURE);
	}

	while( !fin.eof() )
	{
		Student temp(fin);
		rInfor.push_back( temp );
	}	

	fin.clear();
	fin.close();

}

void getRecord(char * file)
{
	ifstream fin;
	string temStr;	

	fin.open(file);

	if (!fin.is_open())
	{
		cerr << "Could not open the file " << file << endl;
		exit(EXIT_FAILURE);
	}

	while (!fin.eof())
    {        
        getline(fin,temStr);
        if (temStr.size() == 0)
        {
            continue;
        }
		else
		{
			cout << temStr << endl;
		}
    }

	fin.clear();
	fin.close();
	
}