/* Simple Caesar Cipher example with shifting right 3 look at ANSI character codes visible characters are from 33 to 122 */ #include #include using namespace std; string CaesarEncrypt () { string plainText = "Some_Test_Example"; // change your text here, pls use '_' instead of spaces cout << "plainText => " << plainText << endl << endl; int strLength = plainText.length(); for (int i=0; i < strLength; i++) { if (plainText[i] != 'x' || plainText[i] != 'y' || plainText[i] != 'z') { plainText[i] += 3; // you can change shifting here, dont forget to change it in decrypt function too } else { switch(plainText[i]) { case 'x': plainText[i] = 33; break; case 'y': plainText[i] = 34; break; case 'z': plainText[i] = 35; } } } return plainText; } string CaesarDecrypt(string encText) { int strLength = encText.length(); for (int i=0; i < strLength; i++) { if (encText[i] != 33 || encText[i] != 34 || encText[i] != 35) { encText[i] -= 3; // back shifting } else { switch(encText[i]) { case 33: encText[i] = 'x'; break; case 34: encText[i] = 'y'; break; case 35: encText[i] = 'z'; } } } return encText; } int main() { string encText = CaesarEncrypt(); cout << "Encrypted text => " << encText << endl << endl; string decrText = CaesarDecrypt(encText); cout << "Decrypted text => " << decrText ; return 0; }

Caesar_Cipher_C++