Overload Operators in C++ – Hacker Rank Solution | HackerRank Programming Solutions | HackerRank C++ Solutions

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Introduction To C++

C++ is a general-purpose programming language that was developed as an enhancement of the C language to include object-oriented paradigm. It is an imperative and a compiled language. 

C++ is a middle-level language rendering it the advantage of programming low-level (drivers, kernels) and even higher-level applications (games, GUI, desktop apps etc.). The basic syntax and code structure of both C and C++ are the same. 

C++ programming language was developed in 1980 by Bjarne Stroustrup at bell laboratories of AT&T (American Telephone & Telegraph), located in U.S.A. Bjarne Stroustrup is known as the founder of C++ language.

Overload Operators in C++- Hackerrank Solution

Objective

You are given a class – Complex.

class Complex
{
public:
    int a,b;
};

Operators are overloaded by means of operator functions, which are regular functions with special names. Their name begins with the operator keyword followed by the operator sign that is overloaded. The syntax is:

type operator sign (parameters) { /*... body ...*/ }

You need to overload operators + and << for the Complex class.
The operator + should add complex numbers according to the rules of complex addition:

(a+ib)+(c+id) = (a+c) + i(b+d)

Overload the stream insertion operator << to add “a+ib” to the stream:

cout<<c<<endl;

The above statement should print “a+ib” followed by a newline where a = c.a and b = c.b .

Input Format :

The overloaded operator + should receive two complex numbers ( a+ib and c+id) as parameters. It must return a single complex number.
The overloaded operator << should add “a+ib” to the stream where a is the real part and b is the imaginary part of the complex number which is then passed as a parameter to the overloaded operator.

Sample Input :

3+i4
5+i6

Sample Output :

8+i10
Overload Operators in C++ – Hacker Rank Solution
#include<iostream>

using namespace std;

class Complex
{
public:
    int a,b;
    void input(string s)
    {
        int v1=0;
        int i=0;
        while(s[i]!='+')
        {
            v1=v1*10+s[i]-'0';
            i++;
        }
        while(s[i]==' ' || s[i]=='+'||s[i]=='i')
        {
            i++;
        }
        int v2=0;
        while(i<s.length())
        {
            v2=v2*10+s[i]-'0';
            i++;
        }
        a=v1;
        b=v2;
    }
};

//Overload operators + and << for the class complex
//+ should add two complex numbers as (a+ib) + (c+id) = (a+c) + i(b+d)
//<< should print a complex number in the format "a+ib"
/* Overload Operators in C++ - Hacker Rank Solution START */
Complex operator+(const Complex X, const Complex Y) 
{
    Complex Z;
    Z.a = X.a + Y.a;
    Z.b = X.b + Y.b;

    return Z;
}
ostream& operator<<(ostream& os, const Complex C) 
{
    return os << C.a << "+" << "i" << C.b;
}
/* Overload Operators in C++ - Hacker Rank Solution END */

int main()
{
    Complex x,y;
    string s1,s2;
    cin>>s1;
    cin>>s2;
    x.input(s1);
    y.input(s2);
    Complex z=x+y;
    cout<<z<<endl;
}

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