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POOperator+ overloading
 

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    <p>Okay I am very new to operator overloading and I have to execute this function in an object oriented program, but I definitely need help. Here are the instructions:</p> <blockquote> <p>The MyString object should contain a Print() method that prints the string</p> <p>The MyString object should contain a Length() method that reports the length of the string</p> <p>The MyString object should contain a default constructor that sets the inital string to the value of "Hello World".</p> <p>The MyString object should contain an alternate constructor that allows for setting of the inital value of the string.</p> <p>The MyString object should overload the following operators:</p> <ul> <li><p>Parenthesis operators should be overloaded to replace the Set and Get functions of your previous assignment. Note that both instances should issue exit(1) upon violation of the string array bounaries. </p></li> <li><p>Assignment operator (=) which will copy the source string into the destination string. Note that size of the destination needs to be adjusted to be the same as the source.</p></li> <li><p>Logical comparison operator (==) that returns true iff the two strings are identical in size and contents.</p></li> <li><p>Negated logical comparison operator (!=) that returns boolean negation of 2.</p></li> <li><p><strong>Addition operator (+) that concatenates two strings</strong></p></li> <li><p>Addition/Assigment operator (+=) used in the following fashion: String1 += String2 to operate as String1 = String1 + String2</p></li> <li><p><strong>Both addition (+) and assignment (=) operators need to be capable of cascaded operations. This means String3 = String1 + String2, or String1 = String2 = String3 should work.</strong></p></li> </ul> </blockquote> <p>Here is my code in the .cpp file:</p> <pre><code>MyString::MyString() { char temp[] = "Hello World"; int counter(0); while(temp[counter] != '\0') { counter++; } Size = counter; String = new char [Size]; for(int i=0; i &lt; Size; i++) String[i] = temp[i]; } MyString::MyString(char *message) { int counter(0); while(message[counter] != '\0') { counter++; } Size = counter; String = new char [Size]; for(int i=0; i &lt; Size; i++) String[i] = message[i]; } MyString::~MyString() { delete [] String; } int MyString::Length() { int counter(0); while(String[counter] != '\0') { counter ++; } return (counter); } **const MyString operator +(const MyString&amp; one, const MyString&amp; two) { MyString String1; return String1; }** MyString&amp; MyString::operator()(const int index, const char b) { if(String[index] == '\0') { exit(1); } else { String[index] = b; } } MyString&amp; MyString::operator=(const MyString&amp; rhs) { Size = rhs.Size; counter = rhs.counter; delete [] String; String = new char[Size]; for(int i = 0; i &lt; counter+1 ; i++) { String[i] = rhs.String[i]; } return *this; } bool MyString::operator==(const MyString&amp; one) { if(one.Length() == two.Length()) { for(int i = 0; i &lt; one.Length()+1; i++) { if(one[i] == two[i]) return true; } } else return false; } MyString&amp; MyString::operator()(const int i) { if( String[i] == '\0') { exit(1); } else { return String[i]; } } void MyString::Print() { for(int i=0; i &lt; Size; i++) cout &lt;&lt; String[i]; cout &lt;&lt; endl; } </code></pre> <p>Here is my code in the main file:</p> <pre><code>int main (int argc, char **argv) { MyString String1; //Test of default constructor. Use "Hello world" MyString String2 ("Two strings are not equal"); //Test of alternate constructor MyString String3 ("Two strings are equal"); MyString String4 (String1); cout &lt;&lt; "*************Test of values*************" &lt;&lt; endl; String1.Print (); String2.Print (); String3.Print (); cout &lt;&lt; "*************Test of Length*************" &lt;&lt; endl; cout &lt;&lt; String1.Length () &lt;&lt; " "; cout &lt;&lt; String2.Length () &lt;&lt; " "; cout &lt;&lt; String3.Length () &lt;&lt; endl; cout &lt;&lt; "*************Test of Set*************" &lt;&lt; endl; String1 (0, 'J'); String1.Print (); cout &lt;&lt; "*************Test of Copy*************" &lt;&lt; endl; String1.Print (); cout &lt;&lt; endl; String3.Print (); cout &lt;&lt; endl; String3.Copy (String1); //String1 should be copied into String3 String1.Print (); cout &lt;&lt; endl; String3.Print (); cout &lt;&lt; endl; cout &lt;&lt; "*************Test of Get*************" &lt;&lt; endl; for (int i = 0; i &lt; String1.Length (); i++) //The last character should exit the program { cout &lt;&lt; String1 (i) &lt;&lt; " "; } } cout &lt;&lt; endl; if (String1 == String4) { String3.Print (); } else { String4.Print (); } if (String1 != String4) { String3.Print (); } else { String4.Print (); } String1 = String2 = String3; String1.Print (); String2.Print (); String3.Print (); String1 = String2 + String3 + String4; String1.Print (); String2 += String3; String2.Print (); return 0; } </code></pre> <p>The main.cpp file cannot change but the other .cpp file has to compile and run along with that file.</p>
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