I am learning encryption in C++. I read the tutoril on OR-Encryption. I tried to get input from the user and encrypt that phrase, but the compiler said that was forbidden. Here is what I had:

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

int main()
{

char string[11];

cout << "Enter the phrase to be encrypted: ";
cin >> string;

char key[11] = "ABCDEFGHIJ";

for (int x = 0; x < 10; x++)
{
string[x] = string[x]^key[x];
cout << string[x];
}

cout << endl;

system("PAUSE");
return 0;
}