C++ Lecture: 15

Lecture 15

Overloading Operator

Code:

#include <iostream>

#include <conio.h>

using namespace std;

int main (int argc, char *argv[])

{

    int a=4;

    cout << "It is a condition check \n";

    cout <<"It is a true : "<< (a>1 || a==4) << endl;

    cout <<"It is a false : "<< (a>1 || a!=4) << endl;

  getch();

  return 0;

}

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Q) A program that takes a four digits integer from user and shows the digits on the screen separately i.e. if user enters 7531, it displays 7,5,3,1 separately.

Ans:

Code:

#include <iostream>

#include <conio.h>

using namespace std;

int main (int argc, char *argv[])

{

    // declare variables

    int number, digit;

    // prompt the user for input

    cout << "Please enter 4-digit number:";

    cin >> number;

    // get the first digit and display it on screen

    digit = number % 10;

    cout << "The digits are: ";

    cout << digit << ", ";

    // get the remaining two digits number

    number = number / 10;

    // get the next digit and display it

    digit = number % 10;

    cout << digit << ", ";

    // get the remaining two digits number

    number = number / 10;

   

    // get the next digit and display it

    digit = number % 10;

    cout << digit << ", ";

    // get the remaining two digits number

    number = number / 10;

   

        // get the next digit and display it

    digit = number % 10;

    cout << digit << ", ";

    // get the remaining two digits number

    number = number / 10;

  getch();

  return 0;

}

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Q) Following program takes the radius of a circle from the user and calculates the

diameter, circumference and area of the circle and displays the result.

Ans:

Code:

#include <iostream>

#include <conio.h>

using namespace std;

int main (int argc, char *argv[])

{

    // declare variables

   float radius, diameter, circumference, area;

   // prompt the user for radius of a circle

   cout << "Please enter the radius of the circle " ;

   cin >> radius ;

   // calculate the diameter, circumference and area of the circle

   // implementing formula i.e. diameter = 2 r circumference = 2 ç r and area = ç r2

   diameter = radius * 2 ;

   circumference = 2 * 3.14 * radius ; // 3.14 is the value of ç (Pi)

   area = 3.14 * radius * radius ;

   // display the results

   cout << "The diameter of the circle is : " << diameter ;

   cout << "\n  circumference of the circle is : " << circumference ;

   cout << "\n  area of the circle is : " << area ;

  getch();

  return 0;

}

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