02-19-2013
Function to Check if string input from user is alphabetic only
Good Evening. I'm new to C. Can you please help me.
I'm creating an error checking function, user will input a string, this will check if the input is all alphabet or all letters only. If there is a digit or other special char, it will print Error then ask input from user again.
Here's my code. I don't know what's wrong
int isValid (const char str[], const int max) {
int i;
for (i=0; i<= max; i++) {
if (isdigit(str[i])) {
printf("Letters and spaces are only allowed\n");
return 1;
}
else {
return 0;
}
}
}
I'm from the Philippines. Thank you very much.
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LEARN ABOUT DEBIAN
i3-input
I3-INPUT(1) i3 Manual I3-INPUT(1)
NAME
i3-input - interactively take a command for i3 window manager
SYNOPSIS
i3-input [-s <socket>] [-F <format>] [-l <limit>] [-P <prompt>] [-f <font>] [-v]
DESCRIPTION
i3-input is a tool to take commands (or parts of a command) composed by the user, and send it/them to i3. This is useful, for example, for
the mark/goto command.
You can press Escape to close i3-input without sending any commands.
OPTIONS
-s <socket>
Specify the path to the i3 IPC socket (it should not be necessary to use this option, i3-input will figure out the path on its own).
-F <format>
Every occurence of "%s" in the <format> string is replaced by the user input, and the result is sent to i3 as a command. Default value
is "%s".
-l <limit>
Set the maximum allowed length of the user input to <limit> characters. i3-input will automatically issue the command when the user
input reaches that length.
-P <prompt>
Display the <prompt> string in front of user input text field. The prompt string is not included in the user input/command.
-f <font>
Use the specified X11 core font (use xfontsel to chose a font).
-v
Show version and exit.
EXAMPLES
Mark a container with a single character:
i3-input -F 'mark %s' -l 1 -P 'Mark: '
Go to the container marked with above example:
i3-input -F '[con_mark="%s"] focus' -l 1 -P 'Go to: '
ENVIRONMENT
I3SOCK
i3-input handles the different sources of socket paths in the following order:
o I3SOCK environment variable
o I3SOCK gets overwritten by the -s parameter, if specified
o if neither are available, i3-input reads the socket path from the X11 property, which is the recommended way
o if everything fails, i3-input tries /tmp/i3-ipc.sock
The socket path is necessary to connect to i3 and actually issue the command.
SEE ALSO
i3(1)
AUTHOR
Michael Stapelberg and contributors
i3 4.1.2 01/01/2013 I3-INPUT(1)