Operator

[titi]

Hi! How to right the C++ program that initialize the name with null
value and with some specific string?
and how to overload the + operator to concatenate two object and == to
check 2 objects are equal.

Thank.

 

[Rolf Magnus]

Hi! How to right the C++ program that initialize the name with null
value and with some specific string?

I have no idea what you're talking about. What name is supposed to be
initialized, and where?

and how to overload the + operator to concatenate two object and == to
check 2 objects are equal.

MyClass operator+(const MyClass& lhs, const MyClass& rhs)
{
//do the addition
}

bool operator==(const MyClass& lhs, const MyClass& rhs)
{
//do the comparison
}

In many cases (but not all), it's best to write an operator+= for your
class and implement operator+ using +=. Then operator+ becomes:

MyClass operator+(const MyClass& lhs, const MyClass& rhs)
{
return MyClass(lhs) += rhs;
}

 

[Thomas Matthews]

Hi! How to right the C++ program that initialize the name with null
value and with some specific string?

How can one initialize a string with two values, NULL and a
a specific string?

#include <string>
#include <iostream>
using std::string;
using std::cout;
using std::endl;

string name_not_const("name not const");
string null_name;
const string const_name("constant name");

int main(void)
{
cout << '"' << name_not_const << '"' << '\n';
cout << '"' << null_name << '"' << '\n';
cout << '"' << const_name << '"' << endl;
return 0;
}

--
Thomas Matthews

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