Question

C++

9. Write code that will input a number and print the number, the square of the number, and the cube of the number. Continue the operation until 999 is entered.
10. Write code that will request the length and width of a rectangle until 0 is entered for either the length or the width. Print the area and perimeter for each set of inputs.
11. What is the output for the following loop?

int number;

number = 1;

while (number < 11)

{

    number = number + 1;

    cout << number << endl;

}

12. What is the output for the following loop?

int number;

bool done;

number = 2;

done = FALSE;

while (!done)

{

    number = number * 2;

    if (number > 12)

        done = TRUE;

    cout << number << endl;

}

Answer 1

Code to Copy:

// Include the required header file.

#include <iostream>

using namespace std;

// Start of the main() function.

int main()

{

    

    // Declare an integer variable to store user input.

    int num;

    

    // Declare and initialize variables to hold the value

    // of square and cube of input number.

    int square=0, cube=0;

    

    // Prompt the user to input a number.

    cout << "\n Enter a number : ";

    cin >> num;

    // While loop to continues to execute until input

    // number is 999.

    while(num!=999)

    {

    

        // Display the number entered by the user.

        cout<< "\n Entered number is "<<num;

        // Calculate and display the square of a number.

        square=num*num;

        cout << "\n The square of the number "<<num<<" is "<<square;

        // Calculate and display the cube of a number

        cube=num*num*num;

        cout<< "\n The cube of the number "<<num<<" is "<<cube<<endl;

        // Prompt the user to continue the operation or

        // stops the operation by entering 999.

        cout<< "\n Enter a number [999 to exit] : ";

        cin >> num;

    // End of while loop

    }

    return 0;

// End of the main() function.  

}

Code to Copy:

// Include the required header file.

#include <iostream>

using namespace std;

// Start of the main() function.

int main()

{

    // Declare four integers variable to store the length,

    // width, area and perimeter of a rectangle.

    int len, width, area, perimeter;

    // Prompt the user to input the length and width of

    // a rectangle.

    cout<< "Enter the length and width of a rectangle: ";

    cin>>len>>width;

    // While loop continues to execute until 0 is entered

    // for either the length or the width.

    while(len!=0 && width!=0)

    {

        // Calculate and display the area of a rectangle.

        area=len*width;

        cout<< "Area of a rectangle : "<<area;

        // Calculate and display the perimeter of a

        // rectangle.

        perimeter=2*(len+width);

        cout<< "\nPerimeter of a rectangle : " <<perimeter <<endl;

        // Prompt the user to continue the operation or

        // stops by entering 0 for either length or width.

        cout<< "\nEnter the length and width of a rectangle [0 to exit]: ";

        cin>>len>>width;

    // End of while loop.

    }

    return 0;

// End of the main() function.

}