And a little piece of advice. When working with decimal numbers, don't use float, instead use more precise double.

Do you know why do you use typedef?
It's syntax should be:

typedef some huge type A_DEF;


And the code you wrote has no use from typedef since you haven't specified name that will replace...

Funny:

typedef struct node {
char value;
bool isroot;
bool isend;
struct node* sibling;
struct node* child;
}; //<== if semicolon goes here, it's much more reasonable

Although, if you're doing it for class of some sort, wouldn't it be better to make your own toupper? Just a thought.
Remember, letters are stored actually as ascii code, and you can "add" them or...

Ahh, I knew someone will say something like that :)
Of course it can be dangerous, so are pointers (but we still use those).



For first this I have only one answer: scanf("%40s", string);
For...

And yet, scanf can be clever function:

#include <stdio.h>

int main(){
char dump, string[40];

printf("Enter whole sentece (yeah, bring spaces too, I can handle it):\n");
scanf...

The only reason this code should give you error is if you input something else that float, let's say letter. So please post what number did you entered for its first input?

And please, write:
int...

You could write your hex-to-deci function, and then you can simply write
char a = hex-to-deci-function(hex_num)

Thank you for your answers :)

@Narue
I see you are using goto.

And I know programmers don't like to use goto, so if I may ask: why? :)
Did you just use it because it's fastest to write code like that?
Or would you still use...

It goes like this:
n(0) = 1;
n(1) = 1;
n(2) = n(1), n(2) //so it's actually two numbers
n(3) = n(1), n(2), n(3)...

Bottom line is: First two numbers just copy.
The print others in a for loop

Flushes everything (like a damn good toilet :) )

Just some literature from wikipedia:
"In C99, there is a bool type, along with the values true and false, defined in the <stdbool.h>"

On line 22 you are declaring function. There's no semicolon in the end.
Main is also a function. Do you write: int main();

I doubt that IT printed out properly. Maybe you retyped it, because on my compiler (gcc) problem is with blank space after last %d that exists in his code, and so scanf asks for continuation of...

This exact code works for me perfectly

Two problems that I see.
What about your input code? First you ask user to insert "a and n", but using scanf() you first get n, then a. That could be problem.

And on end of int main() add return...

Post entire code please. Once more :)

Well, it says about 'n' not being initialised. Try to debug it yourself!

On line 7 you have:

int power (int n); // function prototype

And later you call your function:

float power(float a, int n)

Isn't negative factorial kind of wrong altogether?

I don't see a problem. You don't need this piece of code:

{
int old_number= 0;
int current_number = 1;
int next_number;

}

And why is it called return1??? It should be fact!!!