Question

A programmer wrote the code segment below to display the average of all the elements in a list called numbers. There is always at least one number in the list. text... The programmer wants to reduce the number of operations that are performed when the program is run. Which change will result in a correct program with a reduced number of operations performed?

Answer 1

Swap codes in line 7 and 8

Explanation:

The code segment below

Line 1: count ← 0

Line 2: sum ← 0

Line 3: FOR EACH value IN numbers

Line 4: {

Line 5: count ← count + 1

Line 6: sum ← sum + value

Line 7: average ← sum / count

Line 8: }

Line 9: DISPLAY (average)

The above code will make the program translator calculate the average value at each iteration.

This will take a longer time to execute and also means more instructions for the program translator.

Swapping line 7 and 8 will reduce the number of instructions to execute. This will have an instant effect on the time taken to execute the program.

Swapping line 7 and 8 means that, the program translator will only calculate the average after it must have finished calculating the sum of the values in the iteration statement.