Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 6 years ago.
Improve this question
I'm prompting for a user supplied string using fgets(user_input, input_len, stdin). How can I send, for instance, the byte represented by hex \x04 to the program?
You can do
$ echo -n -e '\x04' | your-program
NOTE: On POSIX echo only octal values are allowed.
If you can get the bytes you want into a file, you can run
your-program < file
Related
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 2 years ago.
Improve this question
I have a to create a program where the user should create a username with minimum of 8 characters and maximum of 12 characters. What should I use for this one? I was thinking to use an array but I am not really sure of how I will set it with minimum of 8 characters, so maybe an array will not work. Is there any other option that I could use???
You can use do-while to check the input.
So it will loop everytime the input is wrong
do{
printf("Username : ");
//scanf here
}while( strlen(your variable) < 8 || strlen(your variable) > 12 );
Everytime the user input username with less than 8 character or more than 12 character, it will ask to input again
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 6 years ago.
Improve this question
How exactly does Ncurses capture input into the console? I would like to implement it myself instead of using ncurses due to the overhead that ncurses is causing.
Thanks!
Very short and basically: It might use the TTY ioctl calls to get and set flags needed for the different modes. Then it could simply use read to read characters in a blocking or non-blocking manner.
Special keys (like the function keys for example) are read using multiple characters which are parsed.
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 6 years ago.
Improve this question
Need to read everything until say *** comes up:
Input:
Hey there
how are
you
***
Output:
Hey there
how are
you
Would have used scanf("%[^***]s) but can't read all lines at once.
Only having basic C knowledge
The way I would do this is read one line at a time (with a funcion such as fgets instead of scanf) and then see if the line that you last read is equal to ***. You can use use strcmp to do that but you can also do it by hand if you are not allowed to use strcmp for some reason.
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 6 years ago.
Improve this question
I want to add two blank space inside c programming print statement. I have try but it always count one single space. How can i add another one ?? If i use \t then it count 4 space as set.
printf("Hello Dhaka!");
printf("Hello Dhaka!"); adds 2 spaces, since it contains 2 spaces.
The problem must be related to your output. Perhaps the console uses some strange font that is not fixed-width.
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 7 years ago.
Improve this question
In C, is it possible to force an unsigned char to print as a hex, not with %x, but in the little square box that displays the four hex numbers, but only takes up one character, for example 轩?
No, it is not possible.
This is not related to C, but to the font your terminal uses. C outputs characters as bytes; your terminal is responsible for choosing how to display them as pixels. (You might as well ask how to make the text italic.)