I need help with a c++ program please?

Hey guys I have a program that I need to write and I have no idea how to do it:


this program has to prompt the user in a menu to encrypt a message, decrypt or quit.


I'm supposed to use functions in this program


This is what i am supposed to use without removing any parts, just adding things where needed.


#include%26lt;iostream%26gt;


using namespace std;





int menu();


void encrypt(int);


void decrypt();








int main(){





int choice;


int shift = 7; // default shift


choice = menu();


while (choice != 3){


if (choice == 1){


cout %26lt;%26lt; "Enter the 'shift' value: ";


cin %26gt;%26gt; shift;


encrypt(shift); }


else


decrypt();





cout%26lt;%26lt;endl%26lt;%26lt;endl%26lt;%26lt;endl;


choice = menu();


}


return 0;


}


I don't even know how to get started functions kind of confuse me


Can someone at least point me in the right direction?

I need help with a c++ program please?
From what I can see here, all the shell functions are already implemented.





You have:


int menu() which prompts the user to enter 1, 2 or 3.





And a while loop that quits if the user types in 3.


1 for encrypt() and 2 for decrypt().





However, where is the code for menu() encrypt() and decript()?


If you're not provided with the codes, then perhaps you need to implement these functions.





//psudo-C-code


int menu(){


char input; // User's input is stored here.


//cout %26lt;%26lt; "Please make a choice:" %26lt;%26lt; endl;


// cout " 1.encrypt"


// cout " 2.decrypt"


// cout " 3.quit"


cin %26gt;%26gt; input;


//convert the input (char) into int and return it.


//You can either use atoi(input) or you can do this:


// return (int)input - '0';


}





I am assuming that the 'Message' you were supposed to key in will be prompted for when the decrypt or encrypt function runs.





void decrypt(){


//prompt for the number sequences (encrypted message)


//Store them in a char array


//For each character in the char array, convert them to the character-number chart you provided.


//Print out the converted results.


}








/*You need to be more specific about the requirements for these functions however, there's no way i would know what 'shift' does. You might need to ask your instructor for more information if it's not provided toyou.*/





void encrypt(int){


//Prompt for a message


//Store message in char array


//Convert each char in the array to the encrypted numbers.


//Print out the encrypted message.


}
Reply:this program seems to be a based on cryptography. u have not mentioned the algorithms used in encrypting and decrypting since are many such methods to do. make sure u have one. Then write the code for each in c or C++. as here


void encrypt( int e )


{


// place ur code here


}

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