محتاجـه مساعدتكم ضروري

:happy: السسسسسسلام عليكـم

انا محتاجـه انـي احل هـ sheet باسرع وقـت ممكن

فاليت تسساعودني بجد محتاجتكم

Fill in the blanks in each of the following:

1- ………………….are used to document a program and improve its readability.

2- The level of computer language most convenient to the programmer for writing programs quickly and easily is……………………..

3- The object used to print information on the screen is …………………

4-………………….The object inputs values from the keyboard.

5- A location in the computer's memory that may contain different values at various times throughout the execution of a program is called a ………………………

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Second question :

Write a single C++ statement or line that accomplishes each of the following:

1- Print the message "Enter two numbers".

2- Assign the product of variables b and c to variable a :

3- Input three integer values from the keyboard and into integer variables a, b and c.

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Third question :

1- Which of the following C++ statements contain variables whose values are replaced?

a) cin >> b >> c >> d >> e >> f;

b) p = i + j + k + 7;

c) cout << "variables whose values are destroyed";

d) cout << "a = 5";

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2- What prints when each of the following C++ statements is performed? If nothing prints, then answer “nothing.”

Assume x = 2 and y = 3.

a) cout << x;

b) cout << x + x;

c) cout << "x=";

d) cout << "x = " << x;

e) cout << x + y << " = " << y + x;

f) z = x + y;

g) // cout << "x + y = " << x + y;

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3- Given the algebraic equation y = ax3 + 7, which of the following, if any, are correct C++ statements for this equation?

a) y = a * x * x * x + 7;

b) y = a * x * x * ( x + 7 );

c) y = ( a * x ) * x * ( x + 7 );

d) y = (a * x) * x * x + 7;

e) y = a * ( x * x * x ) + 7;

f) y = a * x * ( x * x + 7 );

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4- State the order of evaluation of the operators in each of the following C++ statements and show the value of x after each statement is performed.

a) x = 7 + 3 * 6 / 2 - 1;

b) x = 2 % 2 + 2 * 2 - 2 / 2;

c) x = ( 3 * 9 * ( 3 + ( 9 * 3 / ( 3 ) ) ) );

Fourth question :

Determine which of the following variables name is valid or invalid :

_under_bar_ z2 h22

2h 67h2 his_account_total

t5 87 m928134

her_sales 3g j7

a b c

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Fifth question :

Find the error in the following program:

1)

// Addition program that display the sum of two numbers.

#include <iostream>

int main()

{

int number1;

int number2;

std::cout << "Enter first integer: \n";

std::cin << number1;

std::cout << "Enter second integer: \n";

std::cin >> number2;

sum = number1 + number2;

std::cout << "Sum is " << sum << std::endl;

}

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2)

//print message "hello world " in the screen .

int main()

{

std::cout << "hello world \n"

return 0;

}

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Sixth question :

What does the following code print?

cout << "*\n**\n***\n****\n*****\n";

Seventh question:

Write a C++ programs that:

1- prints the numbers 1 to 4 on the same line with each pair of adjacent numbers separated by one space.

Write the program using the following methods:

a) Using one output statement with one stream insertion operator.

b) Using one output statement with four stream insertion operators.

c) Using four output statements.

2- program that asks the user to enter two numbers, obtains the two numbers from the user and prints the sum, product, difference, and quotient of the two numbers.

3- program that reads in the radius of a circle and prints the circle’s diameter, circumference and area. Use the constant value 3.14159 for . Do these calculations in output statements.