Operator Overloading in C++ - BunksAllowed

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    Operator Overloading in C++

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    Operator overloading is one of the most exciting features of object-oriented programming. It can transform complex, obscure program listings into intuitively obvious ones. For example, statements like d3.addobjects(d1, d2); or the similar but equally obscure d3 = d1.addobjects(d2); can be changed to the much more readable d3 = d1 + d2;


    The rather forbidding term operator overloading refers to giving the normal C++ operators, such as +, *, <=, and +=, additional meanings when they are applied to user-defined data types.


    Normally, a = b + c; works only with basic types such as int and float, and attempting to apply it when a, b, and c are objects of a user-defined class will cause complaints from the compiler. However, using overloading, you can make this statement legal even when a, b, and c are user-defined types.


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    #include <iostream>
    using namespace std;
    class Test {
    int longitude, latitude;
    public:
    Test() {}
    Test(int lg, int lt) {
    longitude = lg;
    latitude = lt;
    }
    void show() {
    cout << longitude << " ";
    cout << latitude << "\n";
    }
    Test operator+(Test op2);
    Test operator()(int i, int j);
    };
    Test Test::operator()(int i, int j) {
    longitude = i;
    latitude = j;
    return *this;
    }
    Test Test::operator+(Test op2) {
    Test temp;
    temp.longitude = op2.longitude + longitude;
    temp.latitude = op2.latitude + latitude;
    return temp;
    }
    int main() {
    Test ob1(10, 20), ob2(1, 1);
    ob1.show();
    ob1(7, 8);
    ob1.show();
    ob1 = ob2 + ob1(10, 10);
    ob1.show();
    return 0;
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX




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