Pseudocode:

STEP $-1$: Accumulate input data

Initialize $n$ to zero, initialize array numbers$\_$x to $0$ dimension array.

Prompt user for first positive number and note that "Entering $-1$ will end the process."

Read in first $x$

while $x0$

$$ nlarrn$+1$

${\displaystyle \underset{-}{\overset{?}{}}}x[n]=x$

Prompt user for next number

Read in next $x$

End

STEP $-2$: Calculate mean and Standard Deviation

$,x_{?}$bar larr sum$\_$x $/$ n

std$\_$dev larr sqrt$($ FILL IN THE BLANKS $)$

STEP$-3$: Write Out the results

Write out the mean value x$\_$bar

Write out the standard deviation std$\_$dev

Write out the number of input data points $n$

Additional Questions:

List the conditions when above program will fail.

How can you avoid these possible errors programmatically and change $"-1"$ exit flag to

any letter?