decryption.cpp

#include<iostream>
#include<fstream>
#include<stdio.h>
using namespace std;
int main()
{
    char fileName[30], ch;
    fstream fps, fpt;
    cout<<"Enter the Name of File: ";
    gets(fileName);
    fps.open(fileName, fstream::out);
    if(!fps)
    {
        cout<<"\nError Occurred while Opening the Source File!";
        return 0;
    }
    fpt.open("tmp.txt", fstream::in);
    if(!fpt)
    {
        cout<<"\nError Occurred while Opening/Creating tmp File!";
        return 0;
    }
    while(fpt>>noskipws>>ch)
    {
        ch = ch-100;
        fps<<ch;
    }
    fps.close();
    fpt.close();
    cout<<"\nFile '"<<fileName<<"' Decrypted Successfully!";
    cout<<endl;
    return 0;
}