One Error

I am getting one error in this code, it is at this line:

#include NewString.h // NewString class definition
it says preprocessor syntax error
Not sure how to get rid of it!!!
Thanks!!!

Code:

// newstring.h
// ----------------------------------------------------------------------------------------------------
#ifndef NEWSTRING_H
#define NEWSTRING_H
#include <list>
#include <iostream>

using namespace std;

class NewString
{
private:
    list<char> m_chars;
    
public:
    NewString()  {}
    NewString(const char* psz) {  while (*psz != 0) { m_chars.push_back(*psz); psz++; } }
    ~NewString() {}
    
    NewString& concatenate(const NewString& string2) 
    { m_chars.insert(m_chars.end(), string2.m_chars.begin(), string2.m_chars.end()); return *this; }
    NewString& concatenate(char c) { m_chars.push_back(c); return *this; }
    const char* getText(char* buf, size_t sizBuf)  
    { 
        int i = 0; 
        for (list<char>::iterator it = m_chars.begin(); it != m_chars.end(); ++it) 
            buf[i++] =*it; 
        buf[i] = '\0'; 
        return buf; 
    }
    void            display() 
    { 
        for (list<char>::iterator it = m_chars.begin(); it != m_chars.end(); ++it) 
            cout << *it; 
    }
    int             length()    { return (int)m_chars.size(); }
    bool            is_substring(const NewString& string2)     
    { 
        char* pBuf = new char[m_chars.size()+1]; 
        getText(pBuf, m_chars.size()+1) ; 
        char* pStr = new char[string2.m_chars.size()+1]; 
        getText(pStr, string2.m_chars.size()+1) ; 
        bool ret = false;
        if (strstr(pBuf, pStr) != NULL)
            ret = true;
        delete [] pBuf;   
        delete [] pStr;   
    }
    
}; 
 
#endif // NEWSTRING_H


#include <iostream>
#include <list>
#include NewString.h  // NewString class definition

using namespace std;    

// display program instructions to user
void instructions()
{
   cout << "Enter one of the following:\n"
   <<"  1 to create a NewString from a char*\n" 
   <<"  2 to display the current NewString\n"
   <<"  3 to concatenate a second NewString to the current NewString\n" 
   <<"  4 to show the length of the current NewString\n"
   <<"  5 to find out if a given NewString is substring if the current NewString\n";
 
} // end function instructions

void main()
{  
   cout << "Testing a string of characters " <<". \n";

   instructions();  // display instructions

   int    choice;
   char value[100];

   NewString*  pCurString = NULL;
   
   do {
      cout << "Enter choice (0 to quit)? ";
      cin >> choice;
       
     switch ( choice ) 
    {
         case 1:
            cout << "Enter a text string: ";
            cin >> value;
            
            if (pCurString != NULL)
                delete pCurString;   
            pCurString = new NewString(value);            
            break;
         case 2:
            if (pCurString != NULL)
            {                                           
                cout << "Current NewString = ";
                pCurString->display();
                cout << endl << endl;
            }
            break;
         case 3:   // concatenate string
            if (pCurString != NULL)
            {                                            
                cout << "Current NewString = ";
                pCurString->display();
                cout << endl << endl;
                cout << "Enter string/character to concatenate = ";
                char cinput[64];
                cin >> cinput;

                if (strlen(cinput) != 1)
                {
                    NewString ns(cinput);
                    pCurString->concatenate(ns);   // append a string
                }
                else
                {
                    pCurString->concatenate(cinput[0]);   // append a single char
                }
               


            }
            break;   // Never forget the break

      } // end switch


    }while ( choice != 0 );  
                            // end do/while

   cout << "End list test\n\n";


} 

//---------------------------------- end-of-main.cpp----------------------------------

Code:

#include <iostream>
#include <list>
#include NewString.h

Should Be

Code:

#include <iostream>
#include <list>
#include "NewString.h"

Hmm, now it says it can't be opened.

put it in the same directory as your project or put it in your include directory

#include NewString.h // NewString class definition
it says preprocessor syntax error

It means you need "" or <> around the filename!!!

Yup, needed the <> or " " and to put it in the right directory! Thanks!
Now maybe you can help with the rest? In this code I got case, 1, 2, 3 in the switch, but I am having trouble with 4 and 5.

Code:

#include <iostream>
#include <list>
#include <NewString.h> // NewString class definition

using namespace std;    

// display program instructions to user
void instructions()
{
   cout << "Enter one of the following:\n"
   <<"  1 to create a NewString from a char*\n" 
   <<"  2 to display the current NewString\n"
   <<"  3 to concatenate a second NewString to the current NewString\n" 
   <<"  4 to show the length of the current NewString\n"
   <<"  5 to find out if a given NewString is substring if the current NewString\n";
 
} // end function instructions

void main()
{  
   cout << "Testing a string of characters " <<". \n";

   instructions();  // display instructions

   int    choice;
   char value[100];

   NewString*  pCurString = NULL;
   
   do {
      cout << "Enter choice (0 to quit)? ";
      cin >> choice;
       
     switch ( choice ) 
    {
         case 1:
            cout << "Enter a text string: ";
            cin >> value;
            
            if (pCurString != NULL)
                delete pCurString;   
            pCurString = new NewString(value);            
            break;
         case 2:
            if (pCurString != NULL)
            {                                            
                cout << "Current NewString = ";
                pCurString->display();
                cout << endl << endl;
            }
            break;
         case 3:   // concatenate string
            if (pCurString != NULL)
            {                                           
                cout << "Current NewString = ";
                pCurString->display();
                cout << endl << endl;
                cout << "Enter string/character to concatenate = ";
                char cinput[64];
                cin >> cinput;

                if (strlen(cinput) != 1)
                {
                    NewString ns(cinput);
                    pCurString->concatenate(ns);   // append a string
                }
                else
                {
                    pCurString->concatenate(cinput[0]);   // append a single char
                }
                case 4: 
                case 5:
        }
            break;  

      } // end switch


    }while ( choice != 0 );  
                            // end do/while

   cout << "End list test\n\n";


}