ファイルへの書き込みについて。 (ID:56340)

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#include <iostream>
#include <string.h>
#include <stdlib.h>
#include <conio.h>
#include <fstream>

const int buffer = 256;

using namespace std;

void handling();
void Description();
void ReturnPoint();
void Selection();
void Display();
void FileOutput();

int IntErro( int c );

/**** Class ****/
//Student class
class Student{
public:
	string name;

Student(){};
	Student( string s ){SetName(s);};
	void SetName( string s ){name=s;};
	void InputName();
};

void Student::InputName(){
	string Sname;
	cout << "Please enter student's details below." << endl;
	cout << "Name   :: ";
	cin >> Sname;
	SetName(Sname);
}

// Demographic class
class StDemographic:public Student{
	int age;
	string gender;
public:
	StDemographic(){};
	StDemographic(  string Ns, int a, string s ):Student(Ns){SetAge(a);SetGender(s);};
	void SetAge( int a ){age=a;};
	void SetGender( string s ){gender=s;};
	void InputSetAge();
	void InputSetGender();
	void Display();
};

void StDemographic::InputSetAge(){
	int a;
	cout << "Age    :: ";
	cin >> a;
	SetAge(a);
}

void StDemographic::InputSetGender(){
	string g;
	cout << "Gender :: ";
	cin >> g;
	SetGender(g);
}

void StDemographic::Display(){
	cout << "Name   :: " << name << endl;
	cout << "Age    :: " << age << endl;
	cout << "Gender :: " << gender << "\n" << endl;
}

StDemographic List[100];
int TheNumOfSt = 0;

/**** Function *****/
// Description
void Description(){
	cout << "\t Description" << endl;
	cout << "@ Acknowledgement @" << endl;
	cout << "  We appreciate puchasing our program." << endl;
	cout << "  Our program is to take you to incredible views" << endl;
	cout << "@ How to use @" << endl;
	cout << "  How to use our program is that simply you just" << endl;
	cout << "  select your choice that is displayed." << endl;
}

// Screen First Page
void Screen(){
	cout << "\t *****************" << endl;
	cout << "\t * Masao program *" << endl;
	cout << "\t *****************" << endl;
	cout << endl;
	cout << "Please select one number below to begin this program." << endl;
	cout << "1 ) Description" << endl;
	cout << "2 ) Input students' details." << endl;
	cout << "3 ) Display inputed students Details." << endl;
	cout << "4 ) Exit" << endl;
}

// Char Error trap
char CharError(){
	char select;
	cin >> select;
	while ( cin.fail() ){
		while ( select != 'y' || select != 'Y' || select != 'n' || select != 'N' ){
			cin.clear();
			cin.ignore(buffer,'\n');
			cout << "You have been entered incorrect key." << endl;
			cout << "Please try again." << endl;
			cin >> select;
		}
	}
	system("cls");
	return select;
}

// Int Error trap
int IntError( int c ){
	
	cin >> c;
	system("cls");
	while ( cin.fail() ){	
		cin.clear();
		cin.ignore(buffer,'\n');
		cout << "You have been entered incorrect key." << endl;
		cout << "Please try again." << endl;
		getch();
		system("cls");
		Screen();
		cin >> c;
		system("cls");
	}
	return c;
}

// Exit Page
void ExitScreen(){
	cout << "See you again..." << endl;
}

void ReturnPoint(){
	cout << endl;
	cout << "Press ENTER KEY." << endl;
	getch();
	system("cls");
}

void DisplayDetails(){
	cout << "**** Students' details ****" << endl;
	for ( int i = 0 ; i < TheNumOfSt ; i++ ){
		List[i].Display();
	}
}

// Handling function
void Handling(){
	int i,cnt;
	int choice;
	int num;

cout << "How many student would you like to input?" << endl; 
	cin >> num;
	TheNumOfSt = num;
	for ( i = 0 ; i < num ; i++ ){
		List[i].InputName();
		List[i].InputSetAge();
		List[i].InputSetGender();
		system("cls");
		cout << "Is this correct student's details?" << endl;
		cout << "If yes, press Y." << endl;
		cout << "If no, press N." << "\n" << endl;
		List[i].Display();
		choice = CharError();
		cnt = i;
	
		if ( choice == 'Y' || choice == 'y' ){
			if ( num != cnt + 1 ){
				cout << "Next..." << endl;
			}else{
				cout << "\t **-You have completed-**" << endl;
				cout << endl;
			}
		}else{
			i--;
			cout << "Renter..." << endl;
		}
	}
}

void Selection(){
	int c;
	while ( 1 ){
		
		Screen();
		c = IntError(c);
		system("cls");
		switch(c){
			case 1:
				Description();
				break;
			case 2:
				Handling();
				break;
			case 3:
				DisplayDetails();
				break;
			case 4:
				FileOutput();
				break;
			case 5:
				ExitScreen();
				break;
			default:
				cin.clear();
				cin.ignore(buffer,'\n');
				cout << "You have been entered incorrect key." << endl;
				cout << "Please try again." << endl;
				break;
		}
		ReturnPoint();
		if ( c == 5 ){
			break;
		}
	}
}

// File Output 
void FileOutput(){
	 ofstream File("test.txt");		// File is named by programmer.
	for ( int i = 0 ; i < TheNumOfSt ; i++){
		File << List[i].Display() << endl;
	}
	cout << "You have been completed to output in text file." << endl;
}

int main(){
	Selection();
	return 0;
}

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