Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)
5th Edition
ISBN: 9780134801155
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 7, Problem 4SA
In this chapter you saw how a posttest loop can be used in input validation, as an alternative to the priming read followed by a pretest loop. Why is it typically not best to use a posttest loop approach?
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WAP to Demonstrates the use of a while loop for input validation.
Answer the following sentences true or false
1. The main difference between a do-while loop and the while loop is in the do-while loop the condition is tested at the end of the loop body.
2. In while loop, if the condition is not true, then the body of a loop will not be executed, not even once.
3. If you want to print from 10, then assign the value 0 during initialization.
Give an example of a while loop, then provide the equivalent do-while loop and for loop. Then give a different example of a do-while loop, along with the equivalent while loop and for loop. Finally, give an example of a for loop, along with the equivalent while loop and do-while loop. Use your examples to illustrate the advantages and disadvantages of each looping structure, and describe those advantages and disadvantages.
Chapter 7 Solutions
Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)
Ch. 7.1 - What does the phrase garbage in, garbage out mean?Ch. 7.1 - Give a general description of the input validation...Ch. 7.2 - Describe the steps that are generally taken when...Ch. 7.2 - Prob. 7.4CPCh. 7.2 - If the input that is read by the priming read is...Ch. 7 - GIGO stands for a. great input, great output b....Ch. 7 - The integrity of a programs output is only as good...Ch. 7 - The input operation that appears just before a...Ch. 7 - Validation loops are also known as a. error traps...Ch. 7 - The term empty input describes what happens when...
Ch. 7 - The process of input validation works like this:...Ch. 7 - The priming read appears inside the validation...Ch. 7 - The approach of using a posttest validation loop...Ch. 7 - What does the phrase garbage in, garbage out mean?Ch. 7 - Give a general description of the input validation...Ch. 7 - Prob. 3SACh. 7 - In this chapter you saw how a posttest loop can be...Ch. 7 - Design an algorithm that prompts the user to enter...Ch. 7 - Design an algorithm that prompts the user to enter...Ch. 7 - Design an algorithm that prompts the user to enter...Ch. 7 - Design an algorithm that prompts the user to enter...Ch. 7 - Design an algorithm that prompts the user to enter...Ch. 7 - Prob. 1DECh. 7 - Why does the following pseudocode not perform as...Ch. 7 - The following pseudocode works, but it performs a...Ch. 7 - Payroll Program with Input Validation Design a...Ch. 7 - Theater Seating Revenue with Input Validation A...Ch. 7 - Fat Gram Calculator Design a program that asks for...Ch. 7 - Speeding Violation Calculator Design a program...Ch. 7 - Rock, Paper, Scissors Modification Programming...
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- Select the suitable answer:1.1 If a do...while structure is used:a. An infinite loop cannot take place.b. Counter-controlled iteration is not possible.c. The body of the loop will execute at least once.d. An off-by-one error cannot occur.arrow_forwardExplain the difference between 'while loop' and 'do while loop' with an example for each one.arrow_forwardExplain the relationships among the concepts: definite loop, for loop, andcounted loop.arrow_forward
- Consider the following common task done repeatedly:• Read the next input (x = read())• If the input is not valid (valid(x)), exit the loop• Print the input read (print(x))• Repeat the loopUsing C++ syntax:Write the loop above using a pretest loop, posttest loop and a user-located loop control mechanism. From the three which one is more readable and why?arrow_forwardThere are three kinds of Structures/Expressions/Statements in a computer program; Assignment Statements, Selection Structures and loops. In Formal Methods we studied a technique similar to Selection Statements. Discuss about that kind of structure and also state some differences of it from the ordinary Selection statements. Course: Formal Methods in Software Engineeringarrow_forwardWhat is the major difference between far and while loop in Matlab?arrow_forward
- If the input that is read by the priming read is valid, how many times will theinput validation loop iterate?arrow_forwardA criticism of the break statement and the continue statement is that each is unstructured.Actually, break statements and continue statements can always be replaced by structured statements, although doing so can be awkward. Describe in general how you would remove any breakstatement from a loop in a program and replace that statement with some structured equivalent.[Hint: The break statement leaves a loop from within the body of the loop. The other way to leaveis by failing the loop-continuation test. Consider using in the loop-continuation test a second testthat indicates “early exit because of a ‘break’ condition.”] Use the technique you developed here toremove the break statement from the program of Fig. 4.11arrow_forward12. In .............., the bodies of the two loops are merged together to form a single loop provided that they do not make any references to each other. a. Loop unrolling b. Strength reduction c. Loop concatenation d. Loop jammingarrow_forward
- Example in Java Write and trace sentinel-controlled while loop.arrow_forwardBelow you can see a Mealy and Moore design code as well as simulation (test bench) code. Can you write note on side of code illustrating what the line represents and explain how the two codes are behaving differently? Mealy: Design source code: module mealy #Example of where the notes should go to represent how the lines are behaving ( input shift_start, input shift_stop, input rst, input clk, input d, output reg [7:0] q ); parameter Idle =2'd0; parameter Start =2'd1; parameter Run =2'd2; parameter Stop =2'd3; reg [1:0] state; reg [4:0] delay_cnt; always @(posedge clk or negedge rst) begin if(!rst) begin state <= Idle; delay_cnt <= 0; q <= 0; end else case(state) Idle : begin if(shift_start) state <= Start; end Start : begin if(delay_cnt ==5'd99) begin delay_cnt <= 0; state…arrow_forwardDraw a flow chart for Do-While loop ( in c++ ) for controlled/uncontrolled infinite loop iterations.arrow_forward
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