Please help !!! I submitted the code below but I need to use getline instead of cin so the program would read a string with spaces and I don't know how to do that; also the language is C++

Code I submitted:

// The Header Section

#include

#include

using namespace std;

// The Function Prototypes

char* decrypting(char*);

char* encrypting(char*);

char* input_string();

// The Main function

int main()

{

int opt;

char *str, *opstr;

while(1)

{

// Giving the User Options

cout << " Please Pick a Number From Below: 1 To Encrypt 2 To Decrypt 3 To Exit Your Pick: ";

cin >> opt;

if(opt == 1)

{

// Reading the String

str = input_string();

opstr = encrypting(str);

cout << " Encrypted To: " << opstr;

delete[] str;

}

else if(opt == 2)

{

str = input_string();

opstr = decrypting(str);

cout << " Decrypted To: " << opstr;

delete[] str;

}

else

{

return 0;

}

}

return 0;

}

char* input_string()

{

char *str;

// Allocating The Memory

str = new char[25];

cout << " Input Your String: ";

cin >> str;

return str;

}

// A Function that Decodes the Inputted Message that Uses the Left Rotational Shift Key to a Cypher

char* decrypting(char* cypher)

{

int i,j;

int val, shift=13;

char *decoded_mesg = new char[25];

for(i=0; i

{

val = (int)(cypher[i]);

if(val >= 65 && val <= 90)

{

if( (val - shift) < 65 )

val = 90 - abs(( (val - shift) - 65 )) + 1;

else

val = val - shift;

decoded_mesg[i] = (char)(val);

}

else if(val >= 97 && val <= 122)

{

if( (val - shift) < 97 )

val = 122 - abs(( (val - shift) - 97 )) + 1;

else

val = val - shift;

decoded_mesg[i] = (char)(val);

}

else

decoded_mesg[i] = cypher[i];

}

decoded_mesg[i] = '\0';

return decoded_mesg;

}

// Another Function that Decodes the Inputted Message that Uses the Left Rotational Shift Key to a Plain Text

char* encrypting(char* plain_text)

{

int i,j;

int val, shift=13;

char *decoded_mesg = new char[25];

for(i=0; i

{

val = (int)(plain_text[i]);

if(val >= 65 && val <= 90)

{

if( (val + shift) > 90 )

val = 65 + abs(( 90 - (val + shift) )) - 1;

else

val = val + shift;

decoded_mesg[i] = (char)(val);

}

else if(val >= 97 && val <= 122)

{

if( (val + shift) > 122 )

val = 97 + abs(( 122 - (val + shift) )) - 1;

else

val = val + shift;

decoded_mesg[i] = (char)(val);

}

else

decoded_mesg[i] = plain_text[i];

}

decoded_mesg[i] = '\0';

return decoded_mesg;

}

The Instructions for writing this code:

Cryptography the science of secret writing is an old science; the first recorded use was well before

1900 B.C. An Egyptian writer used previously unknown hieroglyphs in an inscription.

We will use a simple substitution cypher called rot13 to encode and decode our secret messages.

ROT13 ("rotate by 13 places", sometimes hyphenated ROT-13) is a simple letter substitution cipher that replaces a letter with the 13th letter after it, in the alphabet. ROT13 is a special case of the Caesar cipher which was developed in ancient Rome.

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M ------------------------- N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)

As you can see, A becomes N, B becomes O and so on.

Your job is to write a program, with at least four functions, including main, which must do the following:

1. Ask user whether they want to encode or decode a message if no, then terminate
2. Take the input string from the user, store it in dynamic memory (use new)
3. As appropriate, encode or decode the message using Rot13.
4. Output the encoded/decoded message
5. Delete the input string from dynamic memory (use delete)

Input will be a string of no more than 25 characters. Blanks get replaced with blanks.

Do not worry about punctuation; there will be no punctuation in the string.

ALPHABET becomes NYCUNORG

Test your program with the following strings:

TAF VF

paddrpf