What’s the difference between “mod” and “remainder”?
My friend said that there are differences between “mod” and “remainder”. If so, what are those differences in C and C++? Does ‘%’ mean either “mod” or “rem” in C?
C
How to clear input buffer in C?
The program will not work properly because at Line 1, when the user presses Enter, it will leave in the input buffer 2 character: Enter key (ASCII code 13) and \n (ASCII code 10). Therefore, at Line 2, it will read the \n and will not wait for the user to enter a character. The … Read more
getline() vs. fgets(): Control memory allocation
My question is: Isn’t that dangerous? What if by accident or malicious intent someone creates a 100GB file with no ‘\n’ byte in it – won’t that make my getline() call allocate an insane amount of memory? Yes, what you describe is a plausible risk. However, if the program requires loading an entire line into … Read more
The difference between char * and char[] [duplicate]
The most straightforward answer is: The difference here is that will place Hello world in the read-only parts of the memory and making s a pointer to that, making any writing operation on this memory illegal. While doing: puts the literal string in read-only memory and copies the string to newly allocated memory on the … Read more
Dereference void pointer
printf(“\nlVptr[60 ] is %d \n”, *(int*)lVptr); This will cast the void pointer to a pointer to an int and then dereference it correctly. If you want to treat it as an array (of one), you could do a slightly ugly ((int *)lVptr)[0]. Using [1] is out of bounds, and therefore not a good idea (as … Read more
How to read from input until newline is found using scanf()?
scanf (and cousins) have one slightly strange characteristic: white space in (most placed in) the format string matches an arbitrary amount of white space in the input. As it happens, at least in the default “C” locale, a new-line is classified as white space. This means the trailing ‘\n’ is trying to match not only … Read more
ld.exe: cannot open output file … : Permission denied
I had exactly the same problem right after switching off some (in my opinion unneccessary) Windows services. It turned out that when I switched ON again the “Application Experience” everything resumed working fine. May be you simply have to turn on this service? To switch ON Application Experience: Click the Windows start buttonn. In the … Read more
error: ISO C forbids nested functions – What’s wrong?
You missed a closing braces for for loop in the function arraycpy So, the next braces is being taken as the braces for the for loop, and thus when you define the next function, it is being defined inside the next function arraycpy
What are “prototypes” in a C program?
The book’s I’m using to learn C explains something called “prototypes” which I couldn’t understand properly. In the book, the following sample code explains these “prototypes”. What does this mean here? What are the “prototypes”? Please explain in simple terms.
The code does not execute properly. Try to figure out why
The code does not execute properly. Try to figure out why. c program language Thank your kindhearted help ! the question has been solved simply by me, thank everyone!