Question
Please use F#: Start by creating a text file on your system that contains integers, one per line. For example, create data.txt with the following
Please use F#:
Start by creating a text file on your system that contains integers, one per line. For example, create data.txt with the following five values: 15 8 25 17 12 Your program must read from the data.txt file and not operate only on these hard coded values. Your exercise is to write a program that inputs the name of a file, then outputs the contents of the file (as a list of integers), the length, the sum, and the average (as a double). For the file above, heres how the program should behave:
Heres the main program, your job is to write the functions length, sum, and average:
[
let main argv =
printf "filename> "
let filename = System.Console.ReadLine()
let data_array = System.IO.File.ReadAllLines(filename)
let data_list = Array.toList data_array
//
// convert strings to integers:
//
let values = List.map (fun s -> int s) data_list
printfn "%A" values
//
let len = length values
printfn "%A" len
//
let total = sum values
printfn "%A" total
//
let avg = average values Page 5 of 5
printfn "%A" avg
//
0
0
Write length, sum and average recursively; define above main. Note that avg should return a double value, there is no default casting up from integers to doubles so you will need to construct a double from the integer values.
Time Elapsed 00:00:03.08 (base) Yazhinis-MacBook-Pro: program yazhinipriyadharshini$ dotnet build Microsoft (R) Build Engine version 16.4.0+e901037fe for .NET Core Copyright (c) Microsoft Corporation. All rights reserved. Restore completed in 24.89 ms for /Users/yazhinipriyadharshini/Desktop/program/program.fsproj. program -> /Users/yazhinipriyadharshini/Desktop/program/bin/Debugetcoreapp3.1/program.dll Build succeeded. Warning(s) Error(s) n Time Elapsed 00:00:02.90 (base) Yazhinis-MacBook-Pro:program yazhinipriyadharshini$ dotnet run filename> data.txt [15; 8; 25; 17; 12] 77 15.4 (base) Yazhinis-MacBook-Pro:program yazhinipriyadharshini$ Time Elapsed 00:00:03.08 (base) Yazhinis-MacBook-Pro: program yazhinipriyadharshini$ dotnet build Microsoft (R) Build Engine version 16.4.0+e901037fe for .NET Core Copyright (c) Microsoft Corporation. All rights reserved. Restore completed in 24.89 ms for /Users/yazhinipriyadharshini/Desktop/program/program.fsproj. program -> /Users/yazhinipriyadharshini/Desktop/program/bin/Debugetcoreapp3.1/program.dll Build succeeded. Warning(s) Error(s) n Time Elapsed 00:00:02.90 (base) Yazhinis-MacBook-Pro:program yazhinipriyadharshini$ dotnet run filename> data.txt [15; 8; 25; 17; 12] 77 15.4 (base) Yazhinis-MacBook-Pro:program yazhinipriyadharshini$Step by Step Solution
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