Standart amallarni qayta yuklash (dasturlash)


(+) operatorini qayta yuklash



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(+) operatorini qayta yuklash

Bu yerda loc (location) degan sinf yaratilyapti va bu sinfning ikkita longitude va latitude degan maydoni mavjud, show() metodi natijani qaytaradi.

#include

using namespace std;

class loc {

int longitude, latitude;

public:

loc() {}


loc(int lg, int lt) {

longitude = lg;

latitude = lt;

}

void show() {



cout << longitude << " ";

cout << latitude << "\n";

}

loc operator+(loc op2);



};

// + operatorining qayta yuklanishi.

loc loc::operator+(loc op2)

{

loc temp;



temp.longitude = op2.longitude + longitude;

temp.latitude = op2.latitude + latitude;

return temp;

}

int main()



{

loc ob1(10, 20), ob2( 5, 30);

ob1.show(); // natija 10 20

ob2.show(); // natija 5 30

ob1 = ob1 + ob2;

ob1.show(); // natija 15 50

return 0;

}
Demak bu yerda



  • ob3 = ob1 + ob2 + ob3 + ob4; // mumkin!

  • (ob1+ob2).show(x, y); // mumkin!

  • ob2 = ob1 + 50; // mumkin emas!


(-) operatorini qayta yuklash

#include

using namespace std;

class Distance

{

private:


int feet; // 0 to infinite

int inches; // 0 to 12

public:

// required constructors

Distance(){

feet = 0;

inches = 0;

}

Distance(int f, int i){



feet = f;

inches = i;

}

void displayDistance()



{

cout << "F: " << feet << " I:" << inches <

}

Distance operator- ()



{

feet = -feet;

inches = -inches;

return Distance(feet, inches);

}

};

int main()



{

Distance D1(11, 10), D2(-5, 11);

-D1; // apply negation

D1.displayDistance(); // display D1

-D2; // apply negation

D2.displayDistance(); // display D2

return 0;

}



Musosabat operatori (oldingi dasturga o’zgartirish kiritamiz)

// overloaded < operator

bool operator < (const Distance& d)

{

if(feet < d.feet)



{

return true;

}

if(feet == d.feet && inches < d.inches)



{

return true;

}

return false;



}

main() funksiyasiga ham qo’shimcha kiritiladi

int main()

{

Distance D1(11, 10), D2(5, 11);



if( D1 < D2 )

{

cout << "D1 is less than D2 " << endl;



}

else


{

cout << "D2 is less than D1 " << endl;

}

return 0;



}

++ va – unar operatorlarini qayta yuklash

class Time

{

private:



int hours; // 0 to 23

int minutes; // 0 to 59

public:

// required constructors

Time(){


hours = 0;

minutes = 0;

}

Time(int h, int m){



hours = h;

minutes = m;

}

// method to display time

void displayTime()

{

cout << "H: " << hours << " M:" << minutes <

}

// overloaded prefix ++ operator

Time operator++ ()

{

++minutes; // increment this object



if(minutes >= 60)

{

++hours;



minutes -= 60;

}

return Time(hours, minutes);



}

// overloaded postfix ++ operator

Time operator++( int )

{

// save the orignal value

Time T(hours, minutes);



// increment this object

++minutes;

if(minutes >= 60)

{

++hours;



minutes -= 60;

}

// return old original value

return T;

}

int main()



{

Time T1(11, 59), T2(10,40);

++T1; // increment T1

T1.displayTime(); // display T1

++T1; // increment T1 again

T1.displayTime(); // display T1

T2++; // increment T2

T2.displayTime(); // display T2

T2++; // increment T2 again

T2.displayTime(); // display T2

return 0;

}


Tenglik amalini qayta yuklash

class Distance

{

private:


int feet; int inches;

public:


// required constructors

Distance(){

feet = 0; inches = 0;

}

Distance(int f, int i){



feet = f; inches = i;

}

void operator=(const Distance &D )



{

feet = D.feet;

inches = D.inches;

}

// method to display distance

void displayDistance()

{

cout << "F: " << feet << " I:" << inches << endl;



}

};

int main()



{

Distance D1(11, 10), D2(5, 11);

cout << "First Distance : ";

D1.displayDistance();

cout << "Second Distance :";

D2.displayDistance();

// use assignment operator

D1 = D2;


cout << "First Distance :";

D1.displayDistance();

return 0;

}



Mantiqiy operatorlarni yuklash

class coord {

int x, y;

public:


coord() { x = 0; y= 0; }

coord(int i, int j)

{ x = i; y = j; }

void get_xy(int &i, int &j)

{ i = x; j = y; }

int operator==(coord ob2);

int operator&&(coord ob2);

};

int coord::operator==(coord ob2)



{

return x==ob2.x && y==ob2.y;

}

int coord::operator&&(coord ob2)



{

return (x && ob2.x) && (y && ob2.y);

}

if(o1==o2)



{ cout << “o1 o2 ga teng”}

if(o1&&o2)

{cout << "o1 && o2 true";}

() operatorini yuklash. Misol-6

#include

using namespace std;

class Distance

{

private:



int feet; // 0 to infinite

int inches; // 0 to 12

public:

// required constructors

Distance(){

feet = 0;

inches = 0;

}

Distance(int f, int i){



feet = f;

inches = i;

}
// overload function call

Distance operator()(int a, int b, int c)

{

Distance D;



// just put random calculation

D.feet = a + c + 10;

D.inches = b + c + 100 ;

return D;

}

// method to display distance

void displayDistance()

{

cout << "F: " << feet << " I:" << inches << endl;



}

};

int main()



{

Distance D1(11, 10), D2;

cout << "First Distance : ";

D1.displayDistance();

D2 = D1(10, 10, 10); // invoke operator()

cout << "Second Distance :";

D2.displayDistance();

return 0;



}


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