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CS 240Computer

Programming 1

Variables

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Question 1:

Write the following algebraic expressions as C+

+ expressions :

b* b – 4*a*c

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Question 1:

Write the following algebraic expressions as C+

+ expressions :

(y*(x*x-y*y)( / )* +3* *x x x y)

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Question 2-a: Each of the following

assignment statement contains at least one error. Identify

them : D e l t a = x ( y + ( 3 x +

( z + 1 5 ) ) )

X = 5 = y + 4

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Question 2-b:Correct the following program

so that the output will be 5.

* include <iostream>using namespace std; \\function main begins program executionint main()[ int a=5;b=5;c=1;d==1; result = a+b/c+d; cout << "The Result is " << result << endl; // print result; end line}

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Question 2-b:

#include <iostream> using namespace std; //function main begins program execution int main() { int a=5; int b=5; int c=1; int d=1; int result;

result = (a+b)/(c+d); cout << "The Result is " << result << endl; // print result; end line return 0; }

Answer

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Question 3:For the each of the following expressions, give the type and value of its result. Assume the following declarations have been executed before each expression.

int x = 2; int y = 5; int z = 6 ; int t = 7; int d = 8;

d/= y %z + x;

Ty p e : i n t v a l u e : 1

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Question 3:For the each of the following expressions, give the type and value of its result. Assume the following declarations have been executed before each expression.

int x = 2; int y = 5; int z = 6 ; int t = 7; int d = 8;;

x % t < z / y;

Ty p e : b o o l v a l u e : f a l s e

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Question 3:For the each of the following expressions, give the type and value of its result. Assume the following declarations have been executed before each expression.

int x = 2; int y = 5; int z = 6 ; int t = 7; int d = 8;

--t == t-- ;

Ty p e : b o o l v a l u e : t r u e

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Question 3:For the each of the following expressions, give the type and value of its result. Assume the following declarations have been executed before each expression.

int x = 2; int y = 5; int z = 6 ; int t = 7; int d = 8;

t- = y + z - x/t;

Ty p e : i n t v a l u e : - 4

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Question 4:Trace the following code to find the value assigned to each variable. Assume that all variables are properly declared as int.

x = 17;y = 15;x = x + y / 4;z = x % 3 + 4;w = 17 / 3 + 6.5;t = x / 4.0 + 15 % 4 - 3.5;

X= 20Y= 15Z= 6

W= 11T=4

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Question 5:What is the output by each of the following code fragment?

int a=1;

int b=-3;

int c=2;

b=a++;

c+=--a+b++;

cout<<a<<" "<<b<<" " <<c;

The output :

1 2 4

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Question 5:What is the output by each of the following code fragment?

#include <iostream>using namespace std;int main(){int a=3;int result;result = 2 + 17 % 5 * a++ / 4; cout << "The Result is " << result << endl;return 0;}

The output :

The Result is :3

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Question 5:What is the output by each of the following code fragment?

#include <iostream>using namespace std;int main(){ int Cost=5,Price=10; Cost*=Price+2; cout << "The Cost is " << Cost<< endl; cout << "The Price is " << Price<< endl;   return 0; }

The output :

The Cost is 60The Price is 10

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Problems

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Problem 1

Question

Write a program that asks the user to input 2 numbers A and B, then exchange the values of A and B.

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Problem 1Answer

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Problem 1Answer

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Problem 2

Question

Write a program that asks the user to type 5 integers and then prints the average of these 5 integers .

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Answer

Problem 2

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Problem 2Answer

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Problem 3Question

Write a program that reads in the length and the width of a

rectangular yard. Your program should compute the time required (in minutes) to cut

the grass at the rate of 2.3 square meters per a second.

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Problem 3Answer

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Problem 3Answer

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Problem 4Question

Write a program that asks the user to type the price without tax of one kilogram of tomatoes, the number of kilograms you want to buy and the tax in percent units. The program must calculate the

total price including taxes.

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Problem 4Answer

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Problem 4Answer

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Evaluations

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Question

Write a program that prompts the user to input a length expressed in inches. The program should then convert the length to centimeters.

(One inch equals 2.54 centimeters).

Hint

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Answer

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Problem 5Answer