// ConcatenatePtr - concatenate two strings
//                  with a " - " in the middle
//                  using pointer arithmetic
//                  rather than array subscripts
#include <stdio.h> 
#include <iostream.h>

void concatString(char* pszTarget, char* pszSource);

int main(int nArg, char* pszArgs[])
{
    // read first string...
    char szString1[256];
    cout << "Enter string #1:";
    cin.getline(szString1, 128);

    // ...now the second string...
    char szString2[128];
    cout << "Enter string #2:";
    cin.getline(szString2, 128);

    // ...concatenate a " - " onto the first...
    concatString(szString1, " - ");
    
    // ...now add the second string...
    concatString(szString1, szString2);

    // ...and display the result
    cout << "\n" << szString1 << "\n";

    return 0;
}

// concatString - concatenate *pszSource onto the
//                end of *pszTarget
void concatString(char* pszTarget, char* pszSource)
{
    // find the end of the first string
    while(*pszTarget)
    {
        pszTarget++;
    }

    // tack the second onto the end of the first
    // (copy the null at the end of the source array
    // as well - this terminates the concatenated
    // array)
    while(*pszTarget++ = *pszSource++)
    {
    }
}