File decryption help please
Hi guys,
I wrote this program for file encryption and decryption but my decryption command hangs. How do i fix it i am so lost. Thanks!
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#include<iostream>
#include<fstream>
#include <stdlib.h>
#include<string.h>
using namespace std;
int main()
{
string source;
string destination;
int menu;
while(true)
{
cout<<"1. Enter source filename"<<endl
<<"2. Enter destination filename"<<endl
<<"3. Encrypt file"<<endl
<<"4. Decrypt file"<<endl
<<"0. Exit"<<endl;
cin>>menu;
switch (menu)
{
case 1:
{
cout <<"1: Enter source filename" << endl;
cin >> source;
}
break;
case 2:
{
cout << "2: Enter destination filename" << endl;
cin >> destination;
};
break;
case 3:
{
if((source.empty())||(destination.empty()))
{
cout<<"You havenot entered source file"<<endl;
}
else
{
ifstream file1;
file1.open(source.c_str());
ofstream file2;
file2.open(destination.c_str());
char c;
while(!file1.eof())
{
file1>>c;
char newc= int(c)+12;
file2<<newc<<" ";
}
file1.close();
file2.close();
}
}
break;
case 4:
{
if((destination.empty())||(source.empty()))
{
cout<<"You have not entered destination file"<<endl;
}
else
{
ofstream file1;
file1.open(source.c_str());
ifstream file2;
file2.open(destination.c_str());
char c;
while(!file2.eof())
{
file2>>c;
char newc=int(c)-12;
file1<<newc;
}
file1.close();
file2.close();
}
}
break;
case 0:
{
exit (EXIT_SUCCESS);
}
break;
}
}
}
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Last edited on
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char newc= int(c)+12;
file2<<newc<<" ";
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you are adding a space between every char in the output file. When you take it back, this make the original file different...
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