3.12 3.13 hacks and notes

• notes
• hacks for 3.12
• 3.13 Homework/Hacks
• 2. Write a procedure that will allow the A+ to get to the 1, while avoiding the black boxes.
• missing hacks (oops)

notes

procedure: a named group of programming instructions that may have parameters and return values.

Parameters: input values of a procedure.

Modularity: the practice of breaking a complex program into smaller, independent parts or modules that can be used and reused in different parts of the program

HINT: procedures should be descriptive. also consider what parameters to set and what data is needed for the procedure

Note: There are two types of procedures, one that returns a value or some type of data and on that just executes a block of statements. also remember to keep procedures simple.

make sure to have multiple different functions in a procedure

Think of procedures like functions I guess?

hacks for 3.12

Q 1:

a -- ? b -- ? c -- 9 PROCEDURE find a () { b <-- 9 9

a <-- b c

Print (a) } What is a?

ANS: a would become 891 since the procedure puts b as 99 then sets a to be b*c which is 891 (i may be wrong)

Q 2:

cost ⟵ 173 tax - 10% PROCEDURE applytax (cost, cpercentDiscounted){ temp <-- 100 + percentTaxed temp <-- temp / 100 cost <-- cost x temp Print(cost)}

What is the cost?

ANS: temp = 110/100 so cost = 173 * 1.1 = 190.3 so cost = 190.3

3.13 Homework/Hacks

Q 1: Create a procedure that is meant to replace the top running backs yards per game in one season if the current running back has more yards per game

Necessary Parameters: toprbyardspg(100), currentrbyards(1260), totalGames(12)

ANS below

toprbyardspg = 100 
currentrbyards = 1260 
totalGames = 12

procedure topyards(toprbyardspg, currentrbyards, totalGames) {
    currentrbyards = 1260 / totalGames
    if toprbyardspg < currentrbyards:
        currentrbyards = toprbyardspg
}

2. Write a procedure that will allow the A+ to get to the 1, while avoiding the black boxes.

Use what you learned about moving robots

PROCEDURE toEnd() {
    
    move_forward()
    rotate_left()
    move_forward()
    move_forward()
    rotate_right()
    move_forward()
    move_forward()
    move_forward()
    rotate_left()
    move_forward()
    move_forward()
    rotate_left()
    move_forward()
    move_forward()
    rotate_right()
    move_forward()
    rotate_left()
    move_forward()
    move_forward()
    # using loops and if statements may work but for me it would be harder and 
    # take more time
}

Q 3:

Which Is the Correct Way to define the Name of a Procedure?

A. PROCEDURE MYLIST

B. PROCEDURE MyList

C. procedure mylist

ANS: B because procedure is in caps and it's camel cased.

Q 4:

Write A Procedure That gets the BeachBall To the Green Square

PROCEDURE toEnd() {
    move_forward()
    rotate_left()
    move_forward()
    rotate_right()
    move_forward()
    move_forward()
    move_forward()
    move_forward()
    move_forward()
    rotate_left()
    move_forward()
    move_forward()
}

missing hacks (oops)

Problem 1: This problem involves parameters Qais is writing code to calculate formulas from his math class. He's currently working on a procedure to calculate average speed, based on this formula:

Average speed=

Total Time/Total Distance​

Highlight which of these is the best procedure for calculating and displaying average speed.

PROCEDURE calcAvgSpeed (distance, time) { DISPLAY (distance/time) }

PROCEDURE calcAvgSpeed (distance) { DISPLAY (distance/time) }

PROCEDURE calcAvgSpeed (distance, time) { DISPLAY (time/distance) } This is the correct equation, the others have the wrong equation or don't add the extra variables needed.

Problem 2: Procedures with return values

James Hunter is looking through his classmate's program and sees a procedure called heightenEmotions: PROCEDURE heightenEmotions(myEmotion)

{ moreEnergy ← CONCAT(myEmotion, "!!!")

moreVolume ← UPPER(moreEnergy)

RETURN moreVolume }

That procedure manipulates strings using two built-in procedures, CONCAT for concatenating two strings together, and UPPER for converting a string to uppercase.

James Hunter then sees this line of code:

heightenEmotions("im mad")

After that line of code runs, will nothing be displayed?

True because there is nothing displaying the text

False

Problem 3: Procedures with return values Bubz is writing a program to calculate the carbon footprint of his activities. The procedure calcFlightFootprint calculates the pounds of carbon dioxide produced per passenger in a flight that covers a given number of miles and seats a given number of passengers.

PROCEDURE calcFlightFootprint(numMiles, numPassengers) { CO2_PER_MILE ← 53.29

carbonPerFlight ← numMiles * CO2_PER_MILE

carbonPerPassenger ← carbonPerFlight / numPassengers

RETURN carbonPerPassenger

}

Bubz wants to use that procedure to calculate the total footprint for his two upcoming flights: LA to NY: 2,451 miles and 118 passengers NY to London: 3,442 miles and 252 passengers

Which of these code snippets successfully calculates and stores her total footprint? Highlight 2 answers.

totalFootprint ← calcFlightFootprint(2451, 118) + calcFlightFootprint(3442, 252) this is adding the 2 flights co2 production seperately

totalFootprint ← calcFlightFootprint(2451, 118 + 3442, 252)

totalFootprint ← calcFlightFootprint((2451, 118) + (3442, 252)) this is summing up the passengers and miles and then calculating the total flight footprint

laNyCarbon ← calcFlightFootprint(2451, 118) nyLondonCarbon ← calcFlightFootprint(3442, 252) totalFootprint ← laNyCarbon + nyLondonCarbon