OpenEuphoria

Help wanted!

• Posted by Ad Rienks <Ad_Rienks at COMPUSERVE.COM> Feb 19, 1997
• 1049 views

-- file dialog.e
-- enables simple text input and output

include get.e
include graphics.e

global function input(sequence prompt)
-- print a message and read in a number
-- returns the number, that can either be an integer or an atom(float)
sequence input, curpos
    input = {1, 0}              -- this initializes the variable input with
                                -- values that are *not* valid
    puts(1, prompt)             -- put message on screen
    while input[1] do           -- repeat until valid number
        curpos = get_position() -- read current cursor position
        input = get(0)          -- read from the keyboard
        position(curpos[1], curpos[2])  -- back to position if not valid
    end while
    puts(1, '\n')           -- to start on a new line when back from function
    return input[2]         -- the second element of input is returned
                            -- and should contain a valid number
end function    -- input()

-- Input of a string with a prompt:

global function prompt_in(sequence prompt)
sequence in_string          -- to read in the input
    puts(1, prompt)         -- put prompt (question) on the screen
    in_string = gets(0)     -- read string input from the keyboard
    puts(1, '\n')           -- to start on a new line when back from function
        -- return the input string now, but strip off the last character,
        -- since that is a 'new line' character (ASCII 10)
    return in_string[1..length(in_string) - 1]
end function    -- prompt_in()