krypt.cpp

#include <iostream>
#include <string>
#include <cstring>
#include <math.h>
#include <sstream>
#include <algorithm>

using namespace std;

char abc[26] = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'  };

char abcbig[26] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };

char nbr[10] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

char sym[8] = { '!', '@', '#', '$', '%', '^', '&', '*'};

string krypt(string input, bool show_status){
    if(!input.empty() && show_status){
        cout << "encrypting..." << endl << endl;
    }
    else if(input.empty() && show_status){
        cout << "error: string is empty!" << endl << endl;
        return 0;
    }
    string str_obj(input);
    char* chr = new char[input.length() + 1];
    strcpy(chr, input.c_str());

    int length = input.length();
    
    int delta = 2 * pow(length - 1, 2);
    int s1, s2, s3;
    s1 = ((sqrt(delta) + length) * length) - (sqrt(length) * 2) + 1;
    s2 = ((sqrt(delta) - length) * length) + (sqrt(length) * 2) - 1;
    s3 = sqrt(pow(sqrt(s1 + s2), 3) + 1);

    while(s3 > 10){
        s3 -= (s3 / 2) + (s3 % 2);
    }

    unsigned long long int encryptionkey = ((((length * 10 + s3) / length) * sqrt(s3)) + s3 * length + chr[0]) * pow(chr[1], 2) / sqrt(chr[0]);

    int symnbr;
    symnbr = encryptionkey;
    while(symnbr > 8){
        symnbr /= 8;
    }

    int a = 0;

    for(int i = 1; i<=s3 * 2; i++){
        for(int i = 0; i<length; i++){
            for(int j = 0; j<26; j++){
                if(chr[i] == abc[j]){
                    a = j + s3;
                    if(a >= 26){
                        a = a - 26;
                    }
                    chr[i] = abc[a];
                    break;
                }
                else if(chr[i] == abcbig[j]){
                    a = j + s3;
                    if(a >= 26){
                        a = a - 26;
                    }
                    chr[i] = abcbig[a];
                    break;
                }
            }
        }
    }
    for(int i = 0; i<length; i++){
        for(int j = 0; j<10; j++){
            if(chr[i] == nbr[j]){
                a = j + s3;
                if(a >= 10){
                    a = a - 10;
                }
                chr[i] = nbr[a];
                break;
            }
        }
    }
    string krypted;
    for(int i = 0; i<length; i++){
        krypted.push_back(chr[i]);
    }
    auto to_hex = [](string input) -> string{
        int length = input.length();
        stringstream ss;
        for(int i = 0; i<length; i++){
            ss << hex << (int)input[i];
        }
        return ss.str();
    };
    string hexxed = to_hex(krypted);
    int hexlength = hexxed.length();
    int spd2 = 0;
    transform(hexxed.begin(), hexxed.end(), hexxed.begin(), ::toupper);
    
    string encstr = to_string(encryptionkey);
    string symbol (1, sym[symnbr]);
    string fullenc = symbol + to_string(encryptionkey);

    string layer3 = hexxed + fullenc;
    if(show_status){
        cout << layer3;
    }
    return layer3;
}

int main(){
    string input;
    getline(cin, input);
    krypt(input, true);
    return 0;
}