Assignment Operator

llsumitll

Jan 22nd, 2023

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#include <iostream>
using namespace std;
class MyString
{
private:
char *str;
public:
MyString();
MyString(const char *str);
MyString( const MyString &other);
~MyString();
//assignment operator
MyString& operator=(const MyString &rhs); // copy assignment operator
void Display() const;
int get_length() const;
const char *get_str() const;
};
MyString& MyString::operator=(const MyString &rhs)
{
//if (this == &ref)
// return *this;
delete[] this -> str;
str = new char[strlen(rhs.str)+1];
delete[] this -> str;
str = new char[strlen(rhs.str)+1];
strcpy(this->str , rhs.str);
return *this;
}
MyString::MyString()
{
str = new char[1];
*str = '\0';
}
MyString::MyString(const char * s)
{
if(s == nullptr)
{
str = new char[1];
*str = '\0';
}
else
{
str = new char[strlen(s)+1];
strcpy(str, s);
}
}
MyString::MyString(const MyString & source)
{
cout << "Copy Constructor" << endl;
str = new char[strlen(source.str)+1];
strcpy(str, source.str);
}
MyString::~MyString()
{
if (str != nullptr)
delete[] str;
}
void MyString::Display() const
{
for (int i = 0; i <strlen(str) ; i++)
cout << str[i];
cout << endl;
}
int MyString::get_length() const
{
return strlen(str);
}
const char * MyString::get_str() const
{
return str;
}
int main()
{
MyString ms("Hello");
MyString name("Sumit");
MyString MyEdu("BELLB");
MyString aa{name};
aa.get_str();
MyString a;
a = aa;
cout << "aa-> str : " << aa.get_str() << endl;
cout << "a-> str : " << a.get_str() << endl;
//aa = aa;
//cout << name.get_str() << endl;
//cout << "string is: " << ms.Display() << endl;
//cout << "Length of the string : " << ms.get_length() << endl;
//cout << "The string : " << ms.get_str() << endl;
cout << "Program End" ;
return 0;
}

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