Question

C++

The following task is to be submitted with one Header file that contains all of the classes and two CPP or source files that contain the function definitions for the classes and the main. 1. Take what we did in class and create a File class for easy reading and writing access. The constructor should take a string and should open a file. 2. Create a function for writing bytes to a file. The function should be a template function. With an unsigned int to indicate the index at which to write the bytes to. (This is for insertion in the middle of a file) 3. Create a function for reading bytes from a file. This function should be a template function. The function should return type t. The parameter for this function should have an unsigned int to declare the index in the file. 4. The Deconstructor should check if the file is open. If the file is open close the file.

Answer 1

#include<iostream>

#include<fstream>

using namespace std;

//File class

class File

{

fstream file;

public:

//parameter constructor

File(char filename[])

{

//opening file

file.open(filename);

}

//default constructor

File()

{

//do nothing

}

//deconstructor

~File()//to close file..

{

if (file.fail())

{

cout << "\Error!-- file not opened...\n";

file.clear( );

}

else//means file opened ...then closing it

{

file.close();

}

}

//method to open file

void openFile(char filename[])

{

//opening file

file.open(filename);

}

//method to close file

void closeFile()

{

if (file.fail())

{

cout << "\Error!-- file not opened...\n";

file.clear( );

}

else//means file opened ...then closing it

{

file.close();

}

}

//method to write a byte to a file at index

template <class T>

void write(T b,unsigned int i)

{

//setting index position in file

file.seekp(i);

file.put(b);//inserting to file..

}

//method to read a byte to a file at index

template <class T>

void write(T &b,unsigned int i)

{

//setting index position in file

file.seekp(i);

file>>b;//reading from file....

}

};

int main()

{

return 0;

}