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  1. Prepare
  2. Algorithms
  3. Strings
  4. Caesar Cipher
  5. Discussions

Caesar Cipher

  • albrio1
     + 24 comments

    I would encourage the use of the modulus operator (%) over subtracting 26 because any input that is greater than 26 would break a program using subtraction.

        int rot;
    char a;
    string s;
    cin >> rot;
    cin >> s;
    cin >> rot;
    for(auto &c: s){
        if(isalpha(c)){
            a = isupper(c)?'A':'a';
            c= a + (c - a + rot)%26;
        }
    }       
    cout << s << endl;