Strings

[patrickcamp]

Hi I have an array that is the alphabet (in alphabetical order) and i wanted to know how move a string (that is inputed) one to the right in my array then output it
Thank you

[TheIdeasMan]

Hi,

A char is just a small int, so you can increment it. Loop through your string, increment each char in it. You can use the [ ] operator just like an array to access each char. Might need an if statement if you want z to become a

Hope this helps :+)

[patrickcamp]

How would i increment it

[TheIdeasMan]

Use the ++ operator.

Can you show us your code, we can help from there :+)

[JLBorges]

#include <iostream>
#include <string>
#include <algorithm>

int main()
{
    for( std::string alphabet : { "ABCDEFGHIJKLMNOPQRSTUVWXYZ", "ACDHIJKQRUVW" } )
    {
        std::cout << alphabet ;

        for( int i = 0 ; i < 3 ; ++i )
        {
            // http://en.cppreference.com/w/cpp/algorithm/rotate
            std::rotate( alphabet.begin(), alphabet.begin()+1, alphabet.end() ) ; // rotate by one to the left
            std::cout << " => " << alphabet ;
        }
        std::cout << '\n' ;

        std::cout << alphabet ;
        for( int i = 0 ; i < 3 ; ++i )
        {
            std::rotate( alphabet.rbegin(), alphabet.rbegin()+3, alphabet.rend() ) ; // rotate by three to the right
            std::cout << " => " << alphabet ;
        }
        std::cout << "\n\n" ;
    }
}

ABCDEFGHIJKLMNOPQRSTUVWXYZ => BCDEFGHIJKLMNOPQRSTUVWXYZA => CDEFGHIJKLMNOPQRSTUVWXYZAB => DEFGHIJKLMNOPQRSTUVWXYZABC
DEFGHIJKLMNOPQRSTUVWXYZABC => ABCDEFGHIJKLMNOPQRSTUVWXYZ => XYZABCDEFGHIJKLMNOPQRSTUVW => UVWXYZABCDEFGHIJKLMNOPQRST

ACDHIJKQRUVW => CDHIJKQRUVWA => DHIJKQRUVWAC => HIJKQRUVWACD
HIJKQRUVWACD => ACDHIJKQRUVW => UVWACDHIJKQR => KQRUVWACDHIJ

http://coliru.stacked-crooked.com/a/2d260aefa7385145

[patrickcamp]

#include <iostream>
#include "string"
#include "array"
#include "stdio.h"
using namespace std;
string message;
char arrayLower[] = { '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' };

int main() {
int x;
string newMessage;
cout << "What will you like your coded message to say? (write everything in lower case)\n";

getline(cin, message);
for (x = 0; x < message.length(); x++) {
int linearSearch = 0;
char result;
result = linearSearch;
if (result == char()) {
while (message.length()) {
//this is where i want to increment
}
cout << "This is your new message " << newMessage;
}

else {
cout << "Please try again.";
}
}
return 0;

};
// this will check for chars
int linearSearch(){
long size = message.length();
for (char index = 0; index < size; index++) {
bool message(true);
if (message == arrayLower[index])
return index;

}
return 0;
};

[JLBorges]

Could you give an example?
For instance, if the user enters "hello world" as the message, what should the new message be?

[patrickcamp]

if you input "hello world" it would output "ifmmp xpsmd" (one to the right)

[JLBorges]

#include <iostream>
#include <string>
#include <iomanip>

int main()
{
    const std::string alphabet         = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" ;
    const std::string shifted_alphabet = "BCDEFGHIJKLMNOPQRSTUVWXYZAbcdefghijklmnopqrstuvwxyza" ;

    const std::string message = "Hello World!" ; // message entered by the user

    std::string new_message ;
    
    // http://www.stroustrup.com/C++11FAQ.html#for
    for( char c : message ) // for each character c in message
    {
        // find the position of the character in the alphabet
        // http://www.cplusplus.com/reference/string/string/find/
        const auto pos = alphabet.find(c) ;

        // if it was found, add the corresponding character in shifted_alphabet
        if( pos != std::string::npos ) new_message += shifted_alphabet[pos] ;

        else new_message += c ; // otherwise, add the character unchanged
    }

    // http://en.cppreference.com/w/cpp/io/manip/quoted (C++14)
    std::cout << "    message: " << std::quoted(message) << '\n'
              << "new message: " << std::quoted(new_message) << '\n' ;
}

http://rextester.com/KITJ85044