// Concatenate - concatenate two strings
//               with a " - " in the middle
//               (this version crashes)
#include <stdio.h> 
#include <iostream.h>

// prototype declarations
void concatString(char szTarget[], char szSource[]);

int main(int nArg, char* pszArgs[])
{
    cout << "This program concatenates two strings\n";
    cout << "(This version crashes.)\n\n";

    // 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 the string szSource
//                onto the end of szTarget
void concatString(char szTarget[], char szSource[])
{
    int nTargetIndex = 0;
    int nSourceIndex = 0;

    // find the end of the first string
    while(szTarget[nTargetIndex])
    {
        nTargetIndex++;
    }

    // tack the second onto the end of the first
    while(szSource[nSourceIndex])
    {
        szTarget[nTargetIndex] = 
            szSource[nSourceIndex];
        nTargetIndex++;
        nSourceIndex++;
    }
}