Thread: Encryption

I seen another post on here about encryption and I thought I would try my hand at some XOR stuff. I had it perfect but know I want to add in the chance for people to write in the txt they want to be encrypted. I had that working but afterit decrypted the txt there was still a bunch of mubly jumbly after it. So I decided I wanted to clean it up. This is what I got. The comments explain where the errors are at and what they are.

Code:

#include <iostream.h>
#include <stdlib.h>
#include <string.h>


int main()
{     char a[501];
      char b[502]="dmj7HaL(*EjJNuh88iNU67Jbn76n75hu767Bhg567b765mdsd4s";
      char c[501];
      int leg;
      int g=0,h=0;
      cout<<"\nPlease Input Some Text To Be Encrypted\n\n";
      cin.getline(a,502);
      strlen(a)=leg;//problem here I want "leg" to equal the length of "a" "non-lvalue in assignment error"
      while(g<leg)
      {
              for(int x=0, x<502, x++)//parse error before")" here
              {
                c[x]=b[x]^a[x];
                cout<<c[x];} //parse error before "}" here
      
      g++;
      }
      cout<<"\n\nYour Decrypted Text\n\n"; }
      while(h<leg)
      {     
           for(int x=0, x<502, x++) //parse error before ")" here
           {
             a[x]=b[x]^c[x];
             cout<<a[x];
            }          //parse error before "}" here
       h++;
       }     
      cout<<"\n\n";


      system("PAUSE");
      return 0;
}         //parse error at the end of input here.   There is also a "no8"  error on line 14 of a source I don't have open call'd ß

that should be "leg = strlen(a);" and i believe that will fix all your other errors

Good news! Your loop parse errors are syntax errors. Take a
closer look. You also have a premature end main brace (}).
I'll let you find it.

hth,

I know that they were syntax errors but I am not good enuff at reconizing them yet thats why I asked about them. I have only been programing for less the 3 weeks?

the commas in your for loops should be semicolons. Compare your code to this:

Code:

int main()
{
     char a[53] = "\0";	// input
      char b[] = " JNuh88iNU67Jbn76n75hu767Bhg567b765mdsd4s";
      char c[53] = "\0";	// output
      int leg, g = 0, h = 0;
      
     cout << "\nPlease Input Some Text To Be Encrypted"
             << endl;

     cin.getline( a, 52 );  
      
     leg = strlen( a );

     cout << endl << "Your encrypted text: ";

      for(int x = 0; x < leg; x++)
          c[x] = b[x] ^ a[x];           // xor a to c

      cout << c << endl;              // you can treat an array as a string

      cout << "\n\nYour Decrypted Text:  "; 


      for( x = 0; x < leg; x++ ) 
      {
          a[x] = b[x] ^ c[x];
          cout << a[x];
      }
	 
	  
      cout << "\n" << endl;

      return 0;
}

hth,