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Encryption Decryption // C++ program for the above approach | Game Of Codes 😇

Encryption Decryption

// C++ program for the above approach

#include
#include
using namespace std;

// encdec class with encrypt() and
// decrypt() member functions
class encdec {
int key;

// File name to be encrypt
string file = "geeksforgeeks.txt";
char c;

public:
void encrypt();
void decrypt();
};

// Definition of encryption function
void encdec::encrypt()
{
// Key to be used for encryption
cout << "key: ";
cin >> key;

// Input stream
fstream fin, fout;

// Open input file
// ios::binary- reading file
// character by character
fin.open(file, fstream::in);
fout.open("encrypt.txt", fstream::out);

// Reading original file till
// end of file
while (fin >> noskipws >> c) {
int temp = (c + key);

// Write temp as char in
// output file
fout << (char)temp;
}

// Closing both files
fin.close();
fout.close();
}

// Definition of decryption function
void encdec::decrypt()
{
cout << "key: ";
cin >> key;
fstream fin;
fstream fout;
fin.open("encrypt.txt", fstream::in);
fout.open("decrypt.txt", fstream::out);

while (fin >> noskipws >> c) {

// Remove the key from the
// character
int temp = (c - key);
fout << (char)temp;
}

fin.close();
fout.close();
}

// Driver Code
int main()
{
encdec enc;
char c;
cout << "\n";
cout << "Enter Your Choice : -> \n";
cout << "1. encrypt \n";
cout << "2. decrypt \n";
cin >> c;
cin.ignore();

switch (c) {
case '1': {
enc.encrypt();
break;
}
case '2': {
enc.decrypt();
break;
}
}
}
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