I’m beginner with C and I am learning on my own. I am creating the following function: I am basically trying to return an appended string, but I get the following error: “error: function returns address of local variable”, any suggestions, how to fix this?
I expect the output should be 4.08000000 whereas I got only 4.00000000. Is there any way to get the numbers after the dot?
I am writing my own functions for malloc and free in C for an assignment. I need to take advantage of the C sbrk() wrapper function. From what I understand sbrk() increments the program’s data space by the number of bytes passed as an argument and points to the location of the program break. If … Read more
Or, if the pointer can be modified:
\r is a carriage return character; it tells your terminal emulator to move the cursor at the start of the line. The cursor is the position where the next characters will be rendered. So, printing a \r allows to override the current line of the terminal emulator. Tom Zych figured why the output of your … Read more
Both make a new file descriptor corresponding to an existing open file description. Most properties between the old and new fd (like position) are shared; the only property I can think of that’s not shared is the close-on-exec flag. The difference between dup and dup2 is that dup assigns the lowest available file descriptor number, … Read more
There is no standard library function to do this, but it’s not too hard to roll your own. There is an existing question on SO about doing this that was answered with source code.
Your printf needs a format string: This reference page gives details on how to use printf and related functions.
I have this but once it reaches the supposed EOF it just repeats the loop and scanf again.
Yes, it’s a matter of style, because you’d expect sizeof(char) to always be one. On the other hand, it’s very much an idiom to use sizeof(foo) when doing a malloc, and most importantly it makes the code self documenting. Also better for maintenance, perhaps. If you were switching from char to wchar, you’d switch to … Read more