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I guess it doesn't work like this?


void add(struct node *first, struct node *second) {


int sum = 0;
struct node *addition;

while ((first != NULL && second != NULL)) {

Okay so I have


while(first!=NULL && second!=NULL) and it works fine now.


I still don't get it. Can you explain it in simple terms?


And can you also check if I'm doing the algorithm...

I thought I already was.

Like I said, when I enter 12345, and the printf evalutes, it returns 4 because temp->prev->data = 4. So I know I'm doing it backwards.

Besides, that's not my problem....

Hi guys. I'm trying to learn how to add two long integers in a linked list.

So 1->2->3->NULL and 4->5->6->NULL should give me 5->7->9->NULL

I know how to approach the problem but the problem...

Well in my main function, I have a while loop:


while (1) {

printf("Enter a command: ");

fgets(command, sizeof(command), stdin);
command[strlen(command) - 1] = '\0';

Yeah it's this:



int sumDiv(int number) {

int i;
int sum = 0;
for (i = 1; i <= number; i++) {
if(number % i == 0)

Hmm okay so this is what I think you're saying:


void findAmicable(int number) {
int sum1 = sumDiv(number);

if (sumDiv(sum1) == number) {
printf("%d %d\n", number, sum1);
}

Okay I'm a bit confused now.

So first I get all the factors of n and sum it. And that's sum1.

Then I make a loop to find the second number to go with it? How would I do that? Won't that be a...

Yeah you're right. I was actually planning on doing that later. It's what I used for prime and perfect numbers. I wanted to see what the program was actually doing in the debugger so I thought it...

Oh whoops, maybe that's the problem. I'll see if that fixes it.

Oh and it's kinda hard to explain amicable numbers. One example is 220 and 284. They are amicable numbers since the factors of 220...

Hi guys, I wrote up a long program that pretty much works. What it does is when the user enters a string like 4,100 the program prints out all the prime,perfect and amicable pairs in that range.
...

Oh thanks. Yeah I should have read the FAQ. Sorry about that.

Hi guys,
I have a technical question. How do I see if the user's input is a number?

So for example, when they type in 6,4 how can I get both 6 and 4 to store it in two variables?
I tried to...

Hi guys,
I have a technical question. How do I see if the user's input is a number?

So for example, when they type in 6,4 how can I get both 6 and 4 to store it in two variables?
I tried to...

Okay so is this what you mean because I'm still not there yet.




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

#define N_ROWS 6

Oh sorry about that.

Yeah I do have global variables but I guess I will move them inside main.


Okay so you mean I should include each of them in the printf statements in each of the cases or...

Hi guys, I'm having some trouble printing out a 4x4 grid. A 1x1 grid is supposed to look like this:



+----+
| |
| |
| |
+----+

I tried that but it doesn't seem to work. Maybe I'm using a wrong printf conversion?

If I wanted to test that out, would I use

printf("%s", board);

Okay but I don't get how I would store it in the array.

I mean, I get that if row is 0 or 3 in this case, it would output the first and last rows and the else statement is for the middle. But how...

So by first/ last rows you mean



+---+


+---+

Hmm I don't really understand that...

Also what are the ? and : for?

Hi guys, I'm new here and I'm fairly new to C.

This maybe simple to most of you guys but I'm extremely frustrated because I don't know what to do with it at all.

The problem is, I want to...