Assignment 3 Segfault

#include<iostream>
#include "mycstring.h"

using namespace std;

int main(){

    //
    //  Declare a bunch of c strings for testing.
    //

    char hello[] = "hello";
    const char Hello[] = "Hello";
    char *emptyHello;
    const char intro[] = "My name is ___";
    const char fun[] = "This assignment was challenging but fun.";
    const char repeat[] = "Recursion recurses.";
    const char repeat2[] = "Recursion recurses.";
    const char programming[] ="Programming is telling the computer stuff.";
    char computer[] = "I'm now telling the computer *exactly* what it can do with a lifetime supply of chocolate!";

    //
    //  We need an instance to use the functions we wrote, since we
    //  did put them inside of a class, after all
    //

    // Use the default constructr, btw.
    mycstring mystr;

    //  Print the first two strings, copy the first into the second,
    //  print again to verify output.
    //

    cout << endl << "Testing mystrcopy() - Copy one string into the other\n----------------\n\n";

    //Cant print an empty string - so simulate it - bad practice, but yea.
    cout << "Empty Hello: " << endl << "Hello: " << Hello << endl;

    emptyHello = mystr.mystrcopy(emptyHello, Hello);


    cout << "Empty Hello: " << emptyHello << endl << "Hello: " << Hello << endl;

    //
    //  Test concatenation
    //

    cout << endl << "Testing mystrcat() - Concatenates two strings\n----------------\n\n";

    cout << "Empty Hello: " << emptyHello << endl << " Hello:" << Hello << endl;

    mystr.mystrcat(emptyHello, intro);

    cout << "Empty Hello: " << emptyHello << endl << " Hello:" << Hello << endl;


    //
    //  Test comparison
    //

    cout << endl << "Testing mystrcmp() - Compare two strings\n----------------\n\n";

    int equal =  mystr.mystrcmp(repeat, repeat2);

    cout << "\"" << repeat << "\" and  \"" << repeat2 << "\" are " << (equal == 0 ? "" : "not") << " equal." << endl;

    equal = mystr.mystrcmp(repeat, hello);

    cout << "\"" << repeat << "\" and  \"" << hello << "\" are " << (equal == 0 ? "" : "not") << " equal." << endl;

    //
    //  Check if a function contains a character
    //  If it does, return a pointer to that character
    //  Not quite sure how to test this one.
    //
    //  If we find the character, I look for the next one to print
    //  by incrementing the pointer...
    //


    cout << endl << "Testing mystrchr() - Does a string contain a given character? \n----------------\n\n";

    char search = 'x';
    char *result;

    result = mystr.mystrchr(computer, search);

    cout << "Searching inside of the string 'computer'. The string is defined as: " << computer << endl;
    cout << "Result " << *result << " is in string computer" << endl;
    cout << "The character after " << search << " is " << *(result+1) << endl;

    //
    //  Test strlen
    //

    cout << endl << "Testing mystrlen() - How long is a given string?? \n----------------\n\n";

    cout << "\"" << hello << "\"" << " is " << mystr.mystrlen(hello) << " chars long." << endl;

    cout << "\"" << computer<< "\"" << " is " << mystr.mystrlen(computer) << " chars long." << endl;


    cout << endl << "All done!"  << endl << endl;

    //
    //  return - Woot!
    //

    return 0;

}