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#include <iostream>
#include <cstring>
#include <fstream>
// read and write from or to files || ofstream = write on files ifstream = read from files
using namespace std;
void encrypt();
void decrypt();
void savefunction();
char save;
string plaintext, key, encrypt2(string plaintext,string key), decrypt2(string plaintext,string key);;
int choice, word_pos, key_pos;
int main(){
do {
cout<<"\n\n*****ENIGMA*****\n";
cout<<"[1] Encrypt \n[2] Decrypt \n[3] Exit \n";
cout<<"Enter choice: ";
cin>>choice;
switch (choice){
case 1: //encryption
encrypt();
break;
case 2: //decryption
decrypt();
break;
case 3: //exit
break;
}
} while (choice!=3);
return 0;
system("pause");
}
encrypt2 (plaintext, key){
string encrypted = "";//wala pay sulod na result
for(int x = 0, o = 0; x < plaintext.length() ; x++){ //mag loop cya kung unsa katas.a ang word pakapin pod ang key
if(plaintext[x]==' '){ // pag space ang makita
x++;//x++ mag skip og read sa letter kay space man unsa.on man nato kung space paasa kaau ning space
encrypted += " ";//pag space as usual butangan niya og space e aron mag bulag cla space lang jud
}
word_pos = get_location(plaintext[x]); //charot kuhaon nya nag posistion sa letter "word[x]"
key_pos = get_location(key[o]); // kuhaon pud nya ang position sa key kung pila ang idungag
encrypted += get_letter(word_pos + key_pos) ; //kani naline kay kuha.on nya ang letter tapos i sumpay sa encrypted na variable
/* then is sumpay lang to nya kuntahay kay 'b' ang letter then ang key kay 'c'
since ang position sa 'b' kay 1 then ang posistion sa 'c' kay 2 (Note dli na i count gkan pag 'a' so mag start ang 1 sa b)
then i-add lang nimo para ma encrypt cya 1 + 2 = 3 since ang 3 kay 'd' mao lang to .
*/
o++;//kani next letter sa key napod daw ang basahun nya
if(o > key.length()-1)//pag manubra na kuntahay ang length sa love kay 4 man d back to zero napod (note since ge array man pag consider ang string d minus 1 ta aron d mulapas)
o = 0;//reset nya ang o parabakik tag sugod
}
return encrypted;//tapos na done bitches i return nato nya ng ecnryoted na word
}
void encrypt(){
//XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
char yes;string temp;//char yes para sa yes or no then kanang string temp temporary lang pang hold sa first word
cout<<"\n\n*****ENCRYPTION*****\n\n";
cout<<"Enter plain text to encrypt: ";
cin>>temp;//pang hold lang ni
getline(cin, plaintext);
//cin.ignore();
plaintext += temp;//dili na ka ka type
cout<<"Enter encryption key: ";
getline(cin, key);
//cin.ignore();
encrypt2(plaintext, key);
cout<<"Encrypted cipher text: "<<encrypt2(plaintext,key)<<endl; //call nya ang function with the parameters na
cout<<"Save cipher text to file? (y/n): ";
cin>>save;
savefunction();
}
decrypt2(plaintext,key){
string decrypted = "";//parehas ra didtos pikas
for(int x = 0, o = 0; x < plaintext.length() ; x++){//parehas ra didtos pikas
/*if(plaintext[x]==' '){ // pag space ang makita
x++;//x++ mag skip og read sa letter kay space man unsa.on man nato kung space paasa kaau ning space
decrypted += " ";//pag space as usual butangan niya og space e aron mag bulag cla space lang jud
}*/
word_pos = get_location(plaintext[x]);//parehas ra didtos pikas
key_pos = get_location(key[o]);//parehas ra didtos pikas
decrypted += get_letter(word_pos - key_pos+26);//parehas ra didto sa pikas plus 26 lang para sa negative vaules minus lang para atras ba balikan ang dapat balikan
o++;//kani next letter sa key napod daw ang basahun nya
if(o > key.length()-1)//parehas ra didtos pikas
o = 0;//parehas ra didtos pikas
}
return decrypted;//parehas ra didtos pikas
}
void decrypt(){
//XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXxXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
string temp;//temp string
cout<<"\n\n*****DECRYPTION*****\n\n";
cout<<"Enter plain text to decrypt: ";//same ra sa taas
cin>>temp;//pang hold lang ni
getline(cin, plaintext);//kay pag geline
//cin.ignore();
plaintext += temp;//dili na ka ka type
cout<<"Enter decryption key: ";
getline(cin,key);//same ra sa taas
//cin.ignore();
string decrypt2(plaintext,key);
cout<<"Encrypted cipher text: "<<decrypt2(plaintext,key)<<endl;//call nya ang function
}
void savefunction(){
if (save=='Y' || save=='y'){
ofstream file;
string filename;
cout<<"Enter file name: ";
getline(cin, filename); // get user file name
filename += ".txt"; // add .txt after file name
file.open(filename.c_str(), std::ios_base::app);
// file<< --> place the cypher text here to the text file
file.close();
cout<<filename<<" saved successfully!";
}
else if (save=='N' || save=='n'){
cout<<"Cipher text not saved. \n";
}
}
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