Answered: Implement the copy assignment operator=…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Need help with a c++ building block question! Nongraded

Implement the copy assignment operator= for the StringVar class using the options given on the right side window. Place the code into the left side using the arrows. It is possible to get the test case correct but not complete

NOTE: Be careful! There are decoys! The this pointer is used extensively..

Assume that StringVar.h has the following declaration:

#include <iostream>

class StringVar {
public:
StringVar() : max_length(20) { // Default constructor size is 20
value = new char[max_length+1];
value[0] = '\0';
}

StringVar(int size); // Takes an int for size

StringVar(const char cstr[]); // Takes a c-string and copies it

StringVar(const StringVar& strObj); // Copy Constructor

~StringVar(); // Destructor

int size() const { return max_length; } // Access capacity

const char* c_str() const { return value; } // Access value

int length() const { return strlen(value); } // Access length

StringVar& operator= (const StringVar& rightObj);

std::istream& operator>> (std::istream& in, StringVar& strVar);

std::ostream& operator<< (std::ostream& out, const StringVar& strVar);

private:
int max_length;
char* value;
};

The image is the building block codes. Not all blocks need to be used!

Exit Full Screen
RESPONSE AREA
Organize answer blocks in the proper order:
ANSWER BANK
Move the necessary blocks over into the response area:
# StringVars StringVar::operator = (const StringVars rightobj)
# StringVar *this;
# // Copy Assignment operator= for StringVar class.
# strepy(rightobj.value, value);
# #include <cstring>
i if (length () < rightobj.size()) {
# #include "StringVar.h"
return *this;
if (this->max_length < rightObj.length()) {
this->value = new char[this->max_length+1];
# if (c_str(0 < rightobj.c_str)) {
}
if (this != &rightobj) {
strepy (this->value, rightobj.c_str());
this->max_length = rightObj.length();
delete this->value;
# if (*this == rightobj) {

THE CORRECT OUTPUT OF THE TEST CASE
1
Let's make a poem that starts and ends with the same line
2 How many lines are there going to be?Let's write the poem
0:1:2:3:4:5: Here is your poem:
6
Hey, diddle diddle!!
7
9 Hey, diddle diddle!!
10
the cat and the fiddle
11
the cow jumped over the moon
the little boy laughed
12
13
to see such sport
the dish ran away
14
15 Hey, diddle diddle!!
16

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