Answered

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A programmer for a weather website needs to display the proportion of days with freezing temperatures in a given month.


Their algorithm will operate on a list of temperatures for each day in the month. It must keep track of how many temperatures are below or equal to 32. Once it's done processing the list, it must display the ratio of freezing days over total days.
Which of these correctly expresses that algorithm in pseudocode?
A.
numFreezing ← 0

numDays ← 0

FOR EACH temp IN temps {

IF (temp ≤ 32) {

numFreezing ← numFreezing + 1

}

numDays ← numDays + 1

DISPLAY(numFreezing/numDays)

}

B.
numFreezing ← 0

numDays ← 0

FOR EACH temp IN temps {

IF (temp ≤ 32) {

numFreezing ← numFreezing + 1

}

numDays ← numDays + 1

}

DISPLAY(numFreezing/numDays)

C.
numFreezing ← 0

numDays ← 0

FOR EACH temp IN temps {

IF (temp < 32) {

numFreezing ← numFreezing + 1

}

numDays ← numDays + 1

}

DISPLAY(numFreezing/numDays)

D.
numFreezing ← 0

numDays ← 0

FOR EACH temp IN temps {

IF (temp ≤ 32) {

numFreezing ← numFreezing + 1

numDays ← numDays + 1

}

}

DISPLAY(numFreezing/numDays)

Sagot :

sandlee09

Answer:

B.

Explanation:

The correct Pseudocode for this scenario would be B. This code makes two variables for the number of total days (numDays) and number of freezing days (numFreezing). Then it loops through the entire data set and checks if each temp is less than or equal to 32 degrees. If it is, it adds it to numFreezing, if it is not then it skips this step, but still adds 1 to the total number of days after each loop. Once the entire loop is done it prints out the ratio, unlike answer A which prints out the ratio for every iteration of the loop.

numFreezing ← 0

numDays ← 0

FOR EACH temp IN temps {

IF (temp ≤ 32) {

numFreezing ← numFreezing + 1

}

numDays ← numDays + 1

}

DISPLAY(numFreezing/numDays)

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