How to get the user input recursively until the user provides valid input
Hi,
From the above code, if the user enters a invalid file then "file does not exist" is given and the program is done.
How to prompt the user for input continuously untill the user enters the proper file name with absolute path without exiting the program i.e. "Enter file name of input file list along with absolute path : " prompt should be given as long as the user gives a invalid filename.
Using a loop is one way. any other way or better ways? Thanks, Srini
I am trying to create a shell (ksh) which has two "read" commands, one which reads a line from a file and another which is inside a loop that reads user input from a keyboard. However, the "read" command inside the loop uses the input from the file and it does not get the user input from keyboard.... (3 Replies)
how do we read input from a user
e.g i want to ask a user to enter 6 sets of numbers
how do i control information from the user?
i have this.......
#!/bin/bash
echo "Please enter six numbers"
read number
echo $number >> file1
but this stops after the first number..how can i... (2 Replies)
Here is my script:
echo "var 1:"
read varone
echo "$varone"
When I run in via ksh the script runs successfully.
However when I run it via tcsh I get "varone: Undefine variable"
Does the name command not work with tcsh or do I need some additional modification? Is there a way to get... (1 Reply)
Hi everyone,
I cant seem to figure this out for the life of me. Basically, I have two arrays..
sub init {
use Getopt::Long;
use Data::Dumper;
my @selections = ();
my @valid_options = ( "vaild1", "valid2" );
GetOptions( "input=s" =>... (2 Replies)
Please tell me how to write a perl script that asks the user to enter words and that passes them to a variable.
In bash, the "read" command would achieve such user interaction.
#!/bin/bash
read -p "Enter files: " vFiles
However, I am looking for perl version of something equivalent... (2 Replies)
i have a script which takes input from user, if user gives either Y/y then it should continue, else it should quit by displaying user cancelled.
#!/bin/sh
echo " Enter your choice to continue y/Y OR n/N to quit "
read A
if
then
echo " user requested to continue "
##some commands... (7 Replies)
How to check the user input to be valid using shell script?
The valid input is in the format like as follows.
1. It can only have r,w,x or a hyphen and nothing else.
2. ensure the r, w, x are in the correct order.
for example: rwxr-xr-x is a valid format.
Thanks (5 Replies)
The (longer) script that I am working on does something like this:
#!/bin/bash
while true
do
clear
sleep 1
shuf -i1-2 -n1
sleep .1
clear
echo "Press 1 if you saw a 1. Press 2 if you saw a 2."
read -s -n1 RESPONSE
done
If the user accidentally presses two... (1 Reply)
I am trying to allow a user to enter in text and then store that text in a variable $gene to run in an awk command in which those values are used to run some calculations. I am getting syntax errors however, when I try. Thank you :).
The awk runs great if it is a pre-defined file that is used,... (7 Replies)
I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement?
for i in 1 2 3; do
echo "Ready?"
sleep 2
... (10 Replies)
Discussion started by: darwin_886
10 Replies
LEARN ABOUT DEBIAN
extract_font_range
extract_font_range(3alleg4) Allegro manual extract_font_range(3alleg4)NAME
extract_font_range - Extracts a range of characters from a font. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
FONT *extract_font_range(FONT *f, int begin, int end)
DESCRIPTION
This function extracts a character range from a font and returns a new font that contains only the range of characters selected by this
function. You can pass -1 for either the lower or upper bound if you want to select all characters from the start or to the end of the
font. Example:
FONT *myfont;
FONT *capitals;
FONT *fontcopy;
...
/* Create a font of only capital letters */
capitals = extract_font_range(myfont, 'A', 'Z');
/* Create a copy of the font */
fontcopy = extract_font_range(myfont, -1, -1);
...
destroy_font(capitals);
destroy_font(fontcopy);
RETURN VALUE
Returns a pointer to the new font or NULL on error. Remember that you are responsible for destroying the font when you are finished with it
to avoid memory leaks.
SEE ALSO get_font_range_begin(3alleg4), get_font_range_end(3alleg4), merge_fonts(3alleg4), transpose_font(3alleg4), exfont(3alleg4)Allegro version 4.4.2 extract_font_range(3alleg4)