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Pro tip..


printf("Socket creation failed\n");

If the socket failed.. You probably want to exit the program.


fputs("Socket creation failed\n", stderr);
exit(1);

Another good resource is Douglas Comer books

Douglas Comer - Wikipedia

https://www.cs.purdue.edu/homes/comer/comerbooks.html

Pro tip! Post your code with the provided tags.
Next pro tip.. State, clearly, how the data is stored. I assume you are working with ascii text data... Am I right?

I basically want to check if allocated memory has a proper(initialized) value. I want to check if the allocated memory was initialized.

What is a good way to ensure that allocated memory is initialized to a value? I know one can follow strict coding practices but I'm wondering how one can ensure allocated memory is properly...

Your link(attachment) doesn't work.

There isn't a mistake in your diagram. There is a shortcoming in your understanding of C's call by value mechanism.

Understand how C passes values to functions and you'll see what you have to do.

This whole delete function can be solved and understood if you understand that C is a call by value language.
If you understand what call by value is and what a pointer variable is(hint - A pointer...

Shouldn't delete have a way to access the new head?

Yeah, you are right. This doesn't work!


#include <stdio.h>
#include <string.h>

int main(int argc, char ** argv) {
char test_str[] = "G4143's test string";
char * bgn_str = test_str;
...

[QUOTE=Vithika;1307660]
#include <stdio.h>

int main()
{
int i = 0;
char array[6]= {"NEERG"};
char temp = array[0];

for ( int i = 0; i < 6; i++)

You should also consider the case where the swapped characters are identical.

What does this code do?

if (argc != 2)
{
printf("Usage: ./a4 %s\n", file_name);
return1;
}

First you check if the argument counter is not equal to 2 and then use the second argument....

Well Salem presented the easiest way but you could also used pointer arithmetic to access the allocated memory.

You pass a pointer to a pointer because you need to pass the original variable address which is a pointer... Clear as mud right?

It all comes down to what is passed to the function "copied" and...

Yes that is correct.. If you need to change the value of the pointer variable(via a function call), then you pass the address of the variable pointer.

You can't... Memory is not type-identifiable. Memory is memory. You either create a memory pointer that's typed to the type you want or you create some sort of scheme for that's used to identify a...

Do you really need the if statement here? You are taking the sizeof a void pointer.

Well first you have to find a way to walk down a list that contains nodes.
Second, you have to find a way to compare the values of the nodes with the value to insert.

If I try it, it'll be a brute force solution.

Jane Street! That's those OCaml boys! You can bet the puzzle is tricky.

Just to verify the puzzle. We start in the lower left corner at 0 and then we(for example) move to the square above which would could be: The running total of 0 plus the dice face value of 5 multi by...

Is there a big difference between C header files vs C++ header files? I ask because VS Code sets, by default, my C header files to C++ header files.

Basically does either header file offer any...

So basically the compiler knows how big the pointer's data type is...

I'm just wondering if this is a safe practice.



#include <stdio.h>

int main(int argc, char ** argv) {
int * i_ptr = NULL;
fprintf(stdout, "size: %lld\n", sizeof(*i_ptr));//How safe is...