C++ Filing Information Needed

[luckyali444]

Hi, i want to save list of my data into a file. Pls tell me the best way to do it. This code only displays the name i enterd and 0 values of age and id.

Once the records are entered, than i want to modify the any record of my choice... is it possible with filing...??


This is my Student Class Code

#ifndef STUDENT_H
#define STUDENT_H

#include <string.h>

class Student
{
public:
	Student(){id = 0; age = 0;}
	Student(char *n, int i, int a)
	{
		
		strcpy(Name, n);
		id = i;
		age = a;
	}
	void setName(char * n)
	{
        
		strcpy(Name, n);
	}
	void setAge(int a)
	{
		age = a;
	}
	void setId(int i)
	{
		id = i;
	}
	char * getname()
	{
		return Name;
	}
	int getId()
	{
		return id;
	}
	int getAge()
	{
		return age;
	}
private:
	char Name[15];
	int id;
	int age;
};

This is my File Class Code

#ifndef FILING_H
#define FILING_H

#include <string.h>
#include <fstream.h>
#include "Student.h"

class Filing
{
public:
	Filing(){}
	Filing(char * n)
	{
		strcpy(fname, n);
	}
	char * OpenforRead()
	{
		file.open(fname, ios::in);
		if(!file)
		{
			return "Error Opening File";
		}
		else
		{
			return "File Openend Successull!!";
		}
	}
	char * OpenforWrite()
	{
		file.open(fname, ios::out);
		if(!file)
		{
			return "Error Opening File";
		}
		else
		{
			return "File Openend Successull!!";
		}
	}
	void Read(Student & ob)
	{
		file.read((char *)&ob, sizeof(ob));
	}
	void Write(Student & ob)
	{
		file.write((char *)&ob, sizeof(ob));
	}
	void Close()
	{
		file.close();
	}
private:
	fstream file;
	char fname[50];
};
#endif 

This is my Main.cpp Code

#include <iostream.h>
#include "Filing.h"
#include "Student.h"



void main()
{
	Filing file("Student_Data.txt");
	Student ss[3];
	int count=0;

	file.OpenforWrite();
	{
		char name[15];
		int age;
		int id;
		
		

		cout << "Enter Name: ";
		cin >> name;
		cout << "Enter Age:  ";
		cin >> age;
		cout << "Id:         ";
		cin >> id;
		Student s(name,id,age);
		ss[count++] = s;

			
			//ss[count++].setName(name);
			//ss[count++].setAge(age);
			//ss[count++].setId(id);
		
			
			file.Write(ss[3]);
			file.Close();
		
			
		
	}
	file.OpenforRead();
	{
		file.Read(ss[3]);
		
		for (int i=0; i<count; i++)
		
			
			cout << ss[i].getname()<<endl;
			cout << ss[i].getAge()<<endl;
			cout << ss[i].getId()<<endl;
			file.Close();
                       
		
		
	}
}
 

[NewDev]

Yes that can be done...You need to use some function like the below one:

void modify_the_val( string &source,  string find, string replace )
{
	size_t j;
	ofstream myfile_out ("StudentData2.txt",ios::app); 

    for ( ; (j = source.find( find )) != string::npos ; ) {
        source.replace( j, find.length(), replace );
        }

        myfile_out << source <<endl;		
        
}