Slip 25 - B) Write a C++ program to read the contents of a “SampleData.txt” file. Create “Upper.txt” file to store uppercase characters, “Lower.txt” file to store lowercase characters, “Digit.txt” file to store digits and “Other.txt” file to store remaining characters of a given file.

 Solution:

#include <istream>

#include <conio.h>

#include <fstream>

#include <stdlib.h>

#include <ctype.h>

#include <iostream>

using namespace std;

int main()

{

    char fname[20];

    ifstream fin;

    ofstream fc, fu, fl, fd;

    cout << "\n Enter file name : ";

    cin >> fname;

    fin.open(fname, ios::in);

    fc.open("extra.txt", ios::out);

    fu.open("upper.txt", ios::out);

    fl.open("lower.txt", ios::out);

    fd.open("digit1.txt", ios::out);

    if (fin.fail())

    {

        cout << "File does not exists. ";

        exit(1);

    }

    char ch;

    while (!fin.eof())

    {

        ch = fin.get();

        if (islower(ch))

        {

            fl.put(ch);

            

        }

        else if (isupper(ch))

        {

            fu.put(ch);

            

        }

        else if (isdigit(ch))

        {

            fd.put(ch);

        }

        else if ((ch>31 && ch<48)||(ch>57 && ch<65)||(ch>122 && ch<127))

        {

            fc.put(ch);

        }

    }

    cout << "Task Completed....";

    return 0;

}