Comparing characters

New to Julia
1

Hello,
I have a file like the following:

Where The Mind ~ Is Without Fear

I wrote the following program to compare characters and find the largest character:

function compare()
    inn = open("input.txt","r")
    ch = typemin(Int)
    while !eof(inn)
        if ch <  Int(read(inn, Char))
            ch = Int(read(inn, Char))
        end
    end
    println(Char(ch))
end

compare()

The program prints the character u instead of the character ~.

Where is the problem with my program?

Thank you.

2

You compare the current largest (ch) to the character you read. Then you set ch to the next character you read. So when you come to ~ you set ch to the next character , and so on. You should do

c = Int(read(inn, Char))
if ch < c
    ch = c
end

And, besides, you don’t have to convert the characters to Int, you can compare characters directly.

julia> 'u' < '~'
true
1 Like
3

Hi,
Thank you so much.