Translit Master

#include "stdafx.h"
#include <iostream>
#include <stdio.h>
#include <fstream>
#include <cctype>
#include <Windows.h>
//#include <locale>

using namespace std;

char LatToCyr(char r);
char CyrToLat(char r);

int main()
{
    //setlocale(LC_CTYPE, "rus");

    SetConsoleCP(1251);
    SetConsoleOutputCP(1251);

    short int chk = 0;
    short int answ = 0;

    cout << "[ T R A N S L I T ] v1.1\n\n" << "This program can code/decode your Cyrillic text to/from the Latin\n\n";

    do {
        if (chk == 1) cout << "\nBad answer, select one correct please!\n\n";
        chk = 0;
        cout << "Select option:\n\n[1] Code Cyrillic text to the Latin"
            << "\n[2] Decode Cyrillic text from the Latin\n\nYour answer: ";
        cin >> answ;
        if (answ != 1 && answ != 2) chk = 1;
    } while (chk == 1);

    switch (answ) {

    case 1:
    {
              short int answ_c1 = 0;
              do {
                  cout << "\nDo you want to:\n\n[1] Open file with Cyrillic text\n\n[2] Enter it yourself\n\nYour answer: ";
                  cin >> answ_c1;
              } while (answ_c1 != 1 && answ_c1 != 2);

              if (answ_c1 == 1){
                  char file_name[30];
                  cout << "\nEnter file name or directory\n(if file and program located in different places): ";
                  cin >> file_name;

                  ifstream from(file_name, ios::in || ios::binary);
                  if (!from)
                  {
                      cout << "\nNo such file or directory\n";
                      system("pause");
                      return 1;
                  }
                  else{
                      short int answ_c1_o = 0;
                      do {
                          cout << "\nSelect option:\n\n[1] Output on the screen\n[2] Output to the file\n\nYour answer: ";
                          cin >> answ_c1_o;
                      } while (answ_c1_o != 1 && answ_c1_o != 2);

                      switch (answ_c1_o){
                      case 1:{
                                 char buf;
                                 cout << "\nDecoded cyrillic text:\n";
                                 while (from.get(buf))
                                     cout << CyrToLat(buf);
                      }
                      case 2:{
                                 char file_name[30];
                                 cout << "\nEnter file name(name.txt e.g.) for save in program directory\nor full path(D:/name.txt e.g.): ";
                                 cin >> file_name;
                                 ofstream to(file_name);
                                 if (!to){
                                     cout << "Error of writing";
                                     return 1;
                                 }
                                 else{
                                     char buf;
                                     to << "Decoded cyrillic text:\n";
                                     while (from.get(buf))
                                         to << CyrToLat(buf);

                                 }
                      }
                      }
                  }
              }
              if (answ_c1 == 2){
                  char input[501];
                  char *ptr = input;
                  cout << "\nCyrillic text: ";
                  fflush(stdin);
                  gets_s(input, 500);
                  cout << "\n\nDecoded latin text:\n";
                  while (*ptr){
                      cout << CyrToLat(*ptr);
                      ptr++;
                  }
              }

              break;
    }
    case 2:
    {
              short int answ_c2 = 0;
              do {
                  cout << "\nDo you want to:\n\n[1] Open file with Latin translit\n\n[2] Enter it yourself\n\nYour answer: ";
                  cin >> answ_c2;
              } while (answ_c2 != 1 && answ_c2 != 2);

              if (answ_c2 == 1){
                  char file_name[30];
                  cout << "\nEnter file name or directory\n(if file and program located in different places): ";
                  cin >> file_name;

                  ifstream from(file_name, ios::in || ios::binary);
                  if (!from)
                  {
                      cout << "\nNo such file or directory\n";
                      system("pause");
                      return 1;
                  }
                  else{
                      char buf;
                      cout << "\nDecoded cyrillic text:\n";
                      while (from.get(buf))
                          cout << LatToCyr(tolower(buf));
                  }
              }
              if (answ_c2 == 2){
                  char input[501];
                  char *ptr = input;
                  cout << "\nLatin text: ";
                  fflush(stdin);
                  gets_s(input, 500);
                  cout << "\n\nDecoded cyrillic text:\n";
                  while (*ptr){
                      cout << LatToCyr(tolower(*ptr));
                      ptr++;
                  }
              }
              break;
    }
    }

    cout << endl << endl;
    system("pause");
    return 0;
}

char LatToCyr(char r)
{
    char exclusion[2] = "'";
    switch (r)
    {
    case 'q':
        return 'й';
        break;
    case 'w':
        return 'ц';
        break;
    case 'e':
        return 'у';
        break;
    case 'r':
        return 'к';
        break;
    case 't':
        return 'е';
        break;
    case 'y':
        return 'н';
        break;
    case 'u':
        return 'г';
        break;
    case 'i':
        return 'ш';
        break;
    case 'o':
        return 'щ';
        break;
    case 'p':
        return 'з';
        break;
    case 'a':
        return 'ф';
        break;
    case 's':
        return 'ы';
        break;
    case 'd':
        return 'в';
        break;
    case 'f':
        return 'а';
        break;
    case 'g':
        return 'п';
        break;
    case 'h':
        return 'р';
        break;
    case 'j':
        return 'о';
        break;
    case 'k':
        return 'л';
        break;
    case 'l':
        return 'д';
        break;
    case 'z':
        return 'я';
        break;
    case 'x':
        return 'ч';
        break;
    case 'c':
        return 'с';
        break;
    case 'v':
        return 'м';
        break;
    case 'b':
        return 'и';
        break;
    case 'n':
        return 'т';
        break;
    case 'm':
        return 'ь';
        break;
    case ',':
        return 'б';
        break;
    case '.':
        return 'ю';
        break;
    case '/':
        return '.';
        break;
    case ' ':
        return ' ';
        break;
    case '[':
        return 'х';
        break;
    case ']':
        return 'ъ';
        break;
    case ';':
        return 'ж';
        break;
    case '`':
        return 'ё';
        break;
    case '?':
        return ',';
        break;
    case '&':
        return '?';
        break;
    }

    if (r == exclusion[0]) return 'э';
    else
        return r;
}

char CyrToLat(char r)
{
    char exclusion[2] = "'";
    switch (r)
    {
    case 'й':
        return 'q';
        break;
    case 'ц':
        return 'w';
        break;
    case 'у':
        return 'e';
        break;
    case 'к':
        return 'r';
        break;
    case 'е':
        return 't';
        break;
    case 'н':
        return 'y';
        break;
    case 'г':
        return 'u';
        break;
    case 'ш':
        return 'i';
        break;
    case 'щ':
        return 'o';
        break;
    case 'з':
        return 'p';
        break;
    case 'ф':
        return 'a';
        break;
    case 'ы':
        return 's';
        break;
    case 'в':
        return 'd';
        break;
    case 'а':
        return 'f';
        break;
    case 'п':
        return 'g';
        break;
    case 'р':
        return 'h';
        break;
    case 'о':
        return 'j';
        break;
    case 'л':
        return 'k';
        break;
    case 'д':
        return 'l';
        break;
    case 'я':
        return 'z';
        break;
    case 'ч':
        return 'x';
        break;
    case 'с':
        return 'c';
        break;
    case 'м':
        return 'v';
        break;
    case 'и':
        return 'b';
        break;
    case 'т':
        return 'n';
        break;
    case 'ь':
        return 'm';
        break;
    case 'б':
        return ',';
        break;
    case 'ю':
        return '.';
        break;
    case 'ж':
        return ';';
        break;
    case 'х':
        return '[';
        break;
    case 'ъ':
        return ']';
        break;
    case 'ё':
        return '`';
        break;
    }

    if (r == 'э') return exclusion[0];
    else
        return r;
}