Tekst Kryptering Program

Kode 

#include <iostream>
#include <string>
std::string Crypt(const std::string& aIn)
{
   static const char Arr1[] = "klmnopqrstuvwxyzabcdefghij";
   static const char Arr2[] = "KLMNOPQRSTUVWXYZABCDEFGHIJ";
   std::string::size_type idx;
   std::string Out;
   for(idx = 0; idx < aIn.size(); idx++)
   {
      if(aIn[idx] >= 'a' && aIn[idx] <= 'z')
         Out += Arr1[aIn[idx] - 'a'];
      else if(aIn[idx] >= 'A' && aIn[idx] <= 'Z')
         Out += Arr2[aIn[idx] - 'A'];
      else
         Out += aIn[idx];
   }
   return Out;
}

std::string Decrypt(const std::string& aIn)
{
   static const char Arr1[] = "qrstuvwxyzabcdefghijklmnop";
   static const char Arr2[] = "QRSTUVWXYZABCDEFGHIJKLMNOP";
   std::string::size_type idx;
   std::string Out;
   for(idx = 0; idx < aIn.size(); idx++)
   {
      if(aIn[idx] >= 'a' && aIn[idx] <= 'z')
         Out += Arr1[aIn[idx] - 'a'];
      else if(aIn[idx] >= 'A' && aIn[idx] <= 'Z')
         Out += Arr2[aIn[idx] - 'A'];
      else
         Out += aIn[idx];
   }
   return Out;
}

int main()
{
   std::string Line;
   std::cout << "Skriv noget: ";
   std::cout.flush();
   std::getline(std::cin, Line);
   std::string Crypted = Crypt(Line);
   std::cout << "Krypteret: " << Crypted << std::endl;
   std::string Decrypted = Decrypt(Crypted);
   std::cout << "Dekrypteret: " << Decrypted << std::endl;

}

Hov nu er det kun 5.

dem her:

`aInidx' undeclared (first use this function)

(Each undeclared identifier is reported only once

for each function it appears in.)

parse error before `]'

confused by earlier errors, bailing out

Kode 

Out += Arr1[aInidx] - 'a'];

Kode 

#include <iostream>
#include <string>
std::string Crypt(const std::string& aIn)
{
   static const char Arr1[] = "klmnopqrstuvwxyzabcdefghij";
   static const char Arr2[] = "KLMNOPQRSTUVWXYZABCDEFGHIJ";
   std::string::size_type j;
   std::string Out;
   for(j = 0; j < aIn.size(); j++)
   {
      char ch = aIn[ j ];
      if(aIn[ j ] >= 'a' && aIn[ j ] <= 'z')
         Out += Arr1[ch - 'a'];
      else if(aIn[ j ] >= 'A' && aIn[ j ] <= 'Z')
         Out += Arr2[ch - 'A'];
      else
         Out += ch;
   }
   return Out;
}

std::string Decrypt(const std::string& aIn)
{
   static const char Arr1[] = "qrstuvwxyzabcdefghijklmnop";
   static const char Arr2[] = "QRSTUVWXYZABCDEFGHIJKLMNOP";
   std::string::size_type j;
   std::string Out;
   for(j = 0; j < aIn.size(); j++)
   {
      char ch = aIn[ j ];
      if(aIn[ j ] >= 'a' && aIn[ j ] <= 'z')
         Out += Arr1[ch - 'a'];
      else if(aIn[ j ] >= 'A' && aIn[ j ] <= 'Z')
         Out += Arr2[ch - 'A'];
      else
         Out += ch;
   }
   return Out;
}

int main()
{
   std::string Line;
   std::cout << "Skriv noget: ";
   std::cout.flush();
   std::getline(std::cin, Line);
   std::string Crypted = Crypt(Line);
   std::cout << "Krypteret: " << Crypted << std::endl;
   std::string Decrypted = Decrypt(Crypted);
   std::cout << "Dekrypteret: " << Decrypted << std::endl;
}