Colored strings by listings package

Question

I'm trying to type my C++ homework by LaTeX in order to prepare it as a pdf file. I want to have my keywords in blue, my numbers in violet and my strings in reddish brown. I could do the two first by looking up the documentation and other questions here, but I have no idea how to change the color of my strings.

\documentclass{article}
‎‎
\usepackage{etoolbox}
\usepackage{xcolor}‎
\usepackage‎{listings}‎
‎
\newtoggle{InString}{}% Keep track of if we are within a string
\togglefalse{InString}% Assume not initally in string

\newcommand*{\ColorIfNotInString}[1]{\iftoggle{InString}{#1}{\color{violet}#1}}%
\newcommand*{\ProcessQuote}[1]{#1\iftoggle{InString}{\global\togglefalse{InString}}{\global\toggletrue{InString}}}%
\lstset{literate=%
    {"}{{{\ProcessQuote{"}}}}1% Disable coloring within double quotes
    {'}{{{\ProcessQuote{'}}}}1% Disable coloring within single quote
    {0}{{{\ColorIfNotInString{0}}}}1
    {1}{{{\ColorIfNotInString{1}}}}1
    {2}{{{\ColorIfNotInString{2}}}}1
    {3}{{{\ColorIfNotInString{3}}}}1
    {4}{{{\ColorIfNotInString{4}}}}1
    {5}{{{\ColorIfNotInString{5}}}}1
    {6}{{{\ColorIfNotInString{6}}}}1
    {7}{{{\ColorIfNotInString{7}}}}1
    {8}{{{\ColorIfNotInString{8}}}}1
    {9}{{{\ColorIfNotInString{9}}}}1
}‎
‎‎
\begin{document}‎‎‎‎
\lstset{language=C++ , keywordstyle=\color{blue}\bfseries ,commentstyle=\color{white}, stringstyle=\ttfamily, showstringspaces=false}‎
‎‎\begin{lstlisting}[basicstyle=\ttfamily]
#include<iostream>
‎‎using namespace std ;
 for (col = 1 ; col<= 5 ; col++)
      cout << "Enter your number : " ; 
      cin >> a[row][col] ; 
\end{lstlisting}
\end{document}‎

This is the output which I get:

Where I want "Enter your number " in reddish-brown. So what should I do for that?

Answer 1

The following code produces the result I think you want:

\documentclass{article}
\usepackage{xcolor,listings}
\begin{document}

\lstset{language=C++,
    keywordstyle=\color{blue}\bfseries,
    commentstyle=\color{green},
    stringstyle=\ttfamily\color{red!50!brown},
    showstringspaces=false}‎
\lstset{literate=%
   *{0}{{{\color{red!20!violet}0}}}1
    {1}{{{\color{red!20!violet}1}}}1
    {2}{{{\color{red!20!violet}2}}}1
    {3}{{{\color{red!20!violet}3}}}1
    {4}{{{\color{red!20!violet}4}}}1
    {5}{{{\color{red!20!violet}5}}}1
    {6}{{{\color{red!20!violet}6}}}1
    {7}{{{\color{red!20!violet}7}}}1
    {8}{{{\color{red!20!violet}8}}}1
    {9}{{{\color{red!20!violet}9}}}1
}

‎‎\begin{lstlisting}[basicstyle=\ttfamily]
#include<iostream>
using namespace std;
for (col = 1 ; col<= 5 ; col++) {
      cout << "Enter your number : "; 
      cin >> a[row][col];
}
\end{lstlisting}

\end{document}

I removed everything not necessary, and modified the \lstset to include stringstyle=\ttfamily\color{red!50!brown}. The star before the first argument of the literate programming \lstset protects numerals in environments such as comments and strings.

Playing around a bit gets you much more horizontally compact code, which may be clearer to read. I've put additions in the square brackets here, but they can also go in \lstset

\begin{lstlisting}[flexiblecolumns=true,basicstyle=\sffamily]
#include<iostream>
// Test comment.
using namespace std ;
for (col = 1 ; col<= 5 ; col++) {
      cout << "Enter your number : "; 
      cin >> a[row][col];
}
\end{lstlisting}