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March 28, 2017

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write a program that prompts the user to input three numbers. The program should then output the numbers in nondescending order.

  • computer science - ,

    Week 4: Iteration and Repetition - Exercises Help


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    1. (TCO 5) The following is what type of loop?
    Declare Integer n = 1
    Declare Integer s = 0
    Declare Integer number
    Declare String keepGoing = "y"
    While keepGoing == "y"
    Display "Enter an integer."
    Input number
    Set s = s + number
    Set n = n + 1
    Display "Keep going? (Enter y or yes or n for no.)"
    Input keepGoing
    End While
    (Points: 1)
    count controlled pre-test
    count controlled post-test
    condition controlled pre-test
    condition controlled post-test


    2. (TCO 5) Which variable is the accumulator for the following loop?
    Declare Integer n = 1
    Declare Integer s = 0
    Declare Integer number
    Declare String keepGoing = "y"
    While keepGoing == "y"
    Display "Enter an integer."
    Input number
    Set s = s + number
    Set n = n + 1
    Display "Keep going? (Enter y or yes or n for no.)"
    Input keepGoing
    End While
    (Points: 1)
    n
    s
    number
    keepGoing


    3. (TCO 5) Which variable is the counter for the following loop?
    Declare Integer n = 1
    Declare Integer s = 0
    Declare Integer number
    Declare String keepGoing = "y"
    While keepGoing == "y"
    Display "Enter an integer."
    Input number
    Set s = s + number
    Set n = n + 1
    Display "Keep going? (Enter y for yes or n for no.)"
    Input keepGoing
    End While
    (Points: 1)
    n
    s
    number
    keepGoing


    4. (TCO 5) To which variable is the sentinel value assigned in the following loop?
    Declare Integer n = 1
    Declare Integer s = 0
    Declare Integer number
    Declare String keepGoing = "y"
    While keepGoing == "y"
    Display "Enter an integer."
    Input number
    Set s = s + number
    Set n = n + 1
    Display "Keep going? (Enter y for yes or n for no.)"
    Input keepGoing
    End While
    (Points: 1)
    n
    s
    number
    keepGoing


    5. (TCO 5) If the user enters 3, y, 6, y, 7 and n when prompted, what will be displayed by the pseudocode program?
    Declare Integer n = 0
    Declare Integer s = 0
    Declare Integer number
    Declare String keepGoing = "y"
    While keepGoing == "y"
    Display "Enter an integer."
    Input number
    Set s = s + number
    Set n = n + 1
    Display "Keep going? (Enter y for yes or n for no.)"
    Input keepGoing
    End While
    Display n, " ", s
    (Points: 1)
    7 7
    3 16
    4 16
    7 16


    6. (TCO 5) Assume the user enters 3 when prompted to enter the number of values. What value will be displayed by the pseudocode program?
    Declare Integer counter = 1
    Declare Integer maxValue
    Declare Integer s = 0
    Display "Enter the number of values"
    input maxValue
    While counter <= maxValue
    Set s = s + 2
    End While
    Display s
    (Points: 1)
    2
    6
    8
    No value will be displayed, it is an infinite loop


    7. (TCO 5) What value will be displayed by the following pseudocode program?
    Declare Integer counter
    Declare Integer accumulator = 0
    For counter = 1 to 3
    Set accumulator = accumulator + counter
    End For
    Display accumulator
    (Points: 1)
    9
    6
    3
    0


    8. (TCO 5) Which type of loop will always execute at least once? (Points: 1)
    While
    For
    Do-While
    Any pretest loop


    9. (TCO 5) Which of the following is not found in a For loop? (Points: 1)
    sentinel
    counter
    accumulator
    loop body


    10. (TCO 5) One of the following four types of loops can be used for any repetition structure needed in a program. (Points: 1)
    For loop
    While loop
    Do-While loop
    Do-Until loop

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