#include <iostream>

using namespace std;

void encrypt(char *);
void decrypt(char *);

int main()
{
    char string[] = "This is a secret!";

    cout << "Encrypted string is: ";
    encrypt(string);

	cout << "\nDecrypted string is: ";
    decrypt(string);

    cout << endl << endl;

    return 0;
}//end main()

//encrypts string by adding 1 to the value of each character
void encrypt(char *sPtr)
{
     while (*sPtr != '\0')    //exit while at null character
     {
           *sPtr += 1;
           cout << *sPtr;
           ++sPtr;
     }//end while
}//end encrypt()

//decrypts string by subtracting 1 to the value of each character
void decrypt(char *sPtr)
{
     while (*sPtr != '\0')//exit while at null character
     {
           *sPtr -= 1;
           cout << *sPtr;
           ++sPtr;
     }//end while
}//end decrypt()