Soloway's recurring rainfall: Difference between revisions

=={{header|Nim}}==

We catch exceptions related to wrong input, i.e. non integer values. Negative values are allowed. If an end of file is encountered, the program terminates with an error message.

<syntaxhighlight lang="Nim">import std/[strformat, strutils]

const EndValue = 99999

var sum, count = 0.0

while true:

var value: int

# Read input until a valid integer if found.

var input: string

while true:

stdout.write &"Enter an integer value, {EndValue} to terminate: "

stdout.flushFile()

try:

input = stdin.readLine()

value = input.parseInt()

break

except ValueError:

echo &"Expected an integer: got “{input}”"

except EOFError:

quit "\nEncountered end of file. Exiting.", QuitFailure

# Process value.

if value == EndValue:

echo "End of processing."

break

count += 1

sum += value.toFloat

echo &" Current average is {sum / count}."

</syntaxhighlight>

{{out}}

Sample session.

<pre>Enter an integer value, 99999 to terminate: 10

Current average is 10.0.

Enter an integer value, 99999 to terminate: -20

Current average is -5.0.

Enter an integer value, 99999 to terminate: 50

Current average is 13.33333333333333.

Enter an integer value, 99999 to terminate: 3.5

Expected an integer: got “3.5”

Enter an integer value, 99999 to terminate: aaa

Expected an integer: got “aaa”

Enter an integer value, 99999 to terminate: 10

Current average is 12.5.

Enter an integer value, 99999 to terminate: 99999

End of processing.

</pre>