C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN: 9781337102087
Author: D. S. Malik
Publisher: Cengage Learning
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Expert Solution & Answer
Chapter 2, Problem 8CP
a. num1 = 35;
Explanation of Solution
num1 = 35; is a valid assignment as integer 35 is be...
b. newNum = num1 – num2;
Explanation of Solution
newNum = num1 – num2; is a valid assignment although the variables num1 and num2 have not been initialized. If a variable is used in an expression, the expression would yield a meaningf...
c. num1 = 5; num2 = 2 + num1; num1 = num2 / 3;
Explanation of Solution
num1 = 5; num2 = 2 + num1; num1 = num2 / 3; are valid assignments. num1 =5; declares and initializes the variable num1. num2 = 2 + num1; assigns the value of the expression 2 + num1 to num2. Since num1 has been declared and assigned a value, the right-hand expression value is 2 + 5 = 7...
d. num1 * num2 = newNum;
Explanation of Solution
num1 * num2 = newNum; is not a valid assignment as the left hand of a valid assignment is a variable and not an expression...
e. x = 12 * num1 - 15.3;
Explanation of Solution
x = 12 * num1 - 15.3; is a valid assignment although the variable num1 in the expression on the right-hand side has been declared but not initialized before being used in the expression. If a variable is used in an expression, the expression would yield a meaningful value only if the variable has first been initialized...
f. num1 * 2 = newNum + num2;
Explanation of Solution
num1 * 2 = newNum + num2; is not a valid assignment as the left hand of a valid assignment is a variable and not an expression...
g. x / y = x * y;
Explanation of Solution
x / y = x * y; is not a valid assignment as the left hand of a valid assignment is a variable and not an expression...
h. num2 = num1 % 2.0;
Explanation of Solution
num2 = num1 % 2.0; is not a valid assignment as the expression on the right-hand side would not evaluate. The expression on the right-hand si...
i. newNum = static_cast<int> (x) % 5;
Explanation of Solution
newNum = static_cast<int> (x) % 5; is a valid assignment. The double variable is explicitly cast to an int type before it participates as an oper...
j. x = x + y - 5;
Explanation of Solution
x = x + y - 5; is a valid assignment although the variables x and y have not been initialized before being used in the expression. The expression on the right side...
k. newNum = num1 + static_cast<int> (4.6 / 2);
Explanation of Solution
newNum = num1 + static_cast<int> (4.6 / 2); is a valid assignment. The expression on the right-hand side evaluates an unpredictable but int type value. The expression inside the parentheses is evaluated first where the denominator is implicitly casted to floating-point type (as the numerator is floating-point type)...
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Chapter 2 Solutions
C++ Programming: From Problem Analysis to Program Design
Ch. 2 - 1. Mark the following statements as true or...Ch. 2 - Prob. 2MCCh. 2 - Which of the following is not a reserved word in...Ch. 2 - Prob. 4SACh. 2 - 5. Are the identifiers quizNo1 and quiznol the...Ch. 2 - 6. Evaluate the following expressions. (3,...Ch. 2 - If int x = 10;, int y = 7;, double z = 4.5;, and...Ch. 2 - Prob. 8CPCh. 2 - 9. Suppose that x, y, z, and w are int variables....Ch. 2 - Prob. 10SA
Ch. 2 - Which of the following are valid C++ assignment...Ch. 2 - Write C++ statements that accomplish the...Ch. 2 - Write each of the following as a C++ expression....Ch. 2 - Prob. 14SACh. 2 - Suppose x, y, and z are int variables and wandt...Ch. 2 - 16. Suppose x, y, and z are int variables and x =...Ch. 2 - Suppose a and b are int variables, c is a double...Ch. 2 - 18. Write C++ statements that accomplish the...Ch. 2 - Which of the following are correct C++ statements?...Ch. 2 - Give meaningful identifiers for the following...Ch. 2 - 21. Write C++ statements to do the following....Ch. 2 - Prob. 22SACh. 2 - The following program has syntax errors. Correct...Ch. 2 - Prob. 24SACh. 2 - Prob. 25SACh. 2 - Preprocessor directives begin with which of the...Ch. 2 - 27. Write equivalent compound statements if...Ch. 2 - 28. Write the following compound statements as...Ch. 2 - 29. Suppose a, b, and c are int variables and a =...Ch. 2 - Suppose a, b, and sum are int variables and c is a...Ch. 2 - Prob. 31SACh. 2 - Prob. 32SACh. 2 - Prob. 33SACh. 2 - Prob. 34SACh. 2 - 1. Write a program that produces the following...Ch. 2 - Prob. 2PECh. 2 - Prob. 3PECh. 2 - 4. Repeat Programming Exercise 3 by declaring...Ch. 2 - Prob. 5PECh. 2 - Prob. 6PECh. 2 - 7. Write a program that prompts the user to input...Ch. 2 - Prob. 8PECh. 2 - 9. Write a program that prompts the user to enter...Ch. 2 - 10. Write a program that prompts the user to input...Ch. 2 - 11. Write a program that prompts the capacity, in...Ch. 2 - 12. Write a C++ program that prompts the user to...Ch. 2 - 13. To make a profit, a local store marks up the...Ch. 2 - 14. (Hard drive storage capacity) If you buy a 40...Ch. 2 - 15. Write a program to implement and test the...Ch. 2 - 16. A milk carton can hold 3.78 liters of milk....Ch. 2 - 17. Redo Programming Exercise 16 so that the user...Ch. 2 - Prob. 18PECh. 2 - 19. Write a program that prompts the user to input...Ch. 2 - 20. For each used car a salesperson sells, the...Ch. 2 - 21. Newton's law states that the force, , between...Ch. 2 - 22. One metric ton is approximately 2,205 pounds....Ch. 2 - 23. Cindy uses the services of a brokerage firm to...Ch. 2 - 24. A piece of wire is to be bent in the form of a...Ch. 2 - 25. Repeat Programming Exercise 24, but the wire...Ch. 2 - 26. A room has one door, two windows, and a...Ch. 2 - Prob. 27PECh. 2 - 28. In an elementary school, a mixture of equal...Ch. 2 - 29. A contractor orders, say, 30 cubic yards of...
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