Counting PI in C

[Ro0t]

Ah well, i'm new here and wanted to share my PI counting code ;D
Maybe some of you find it interesting


#include <stdio.h>

const PI = 3.1415927;
int Number;

int main()
{
printf("The Power of PI and C\n-----------------\n\n");
printf("Number: ");
scanf("%i",& Number);
printf("%i x pi = %i",Number,Number * PI);

getchar();
getchar();
}


[z00ey]

yep.. welcome here, any source is interesting for someone

..but it doesn t count pi (or am i confused cause of the c code , i m used to c++ ?)

[Ro0t]

Basicly what is doesbr]1. Give the variable PI the PI integer :P
2. Ask for a input to increaseit with
3. Give back the anwser ;D

[z00ey]

yep, that s what i thought.. ..just thought first you were talking about counting the digits after the comma when i saw "counting PI"

(like: number of digits to display: ? etc )

[Trad]

cool, yeah we always like sources and other activity besides our own in this forum

im not used to the stdio i/o. and i dont know what scanf() does, ill have to look it up.

and is it C code? or C++, it looks like c++ but the topic says C, so im confused.

[Trad]

p.s it should be void main(), main doesnt return a value.

[Ro0t]

It's all C code, and it works fine 4 me
I have a book about programming in C and everything i learn i'll place it on this forum, other people plearn 4 free with me ;D
And i have something to check if i have forgoten

I don't see the difference between void main() {} and int main {}
Maybe you can explain

[z00ey]

printf is always c code btw
(one of the much better things in c++ , the inputoutput stream


void main means that the main function doesn t return a value.. ..int main means that it returns a integer value (but it doesn t have to)
..so it s both possible in the hello world program, u can use both.. but because the main function doesn t return a value the void-way would be more accurate

[Ro0t]

Thnx, i'm getting smart by you guys

[Trad]

its as much c++ as it is c

[Trad]

oh yeah, before any function you need to declare the type it returns, ie

char returnachar() {
char mychar = a;
return a;
}

int return_number() {
int number = 5;
return number;
}

void means it doesnt return anything, and in your code, main() doesnt return anything and should be void.

[z00ey]

Trad said:

its as much c++ as it is c

..of course, just because c++ is "downstairs" compatible, lol (you can compile every c code with c++) but it would be pretty silly to use c code with a c++ compiler (printf is not documented in c++ because there are much better ways to handle the input output) ..that s what i meant.. ..it s not c++ code but it can be compiled with c++


btw: same with the ugly .h ..you can use it in c++ because you must use it with c.. ..but it s not necessary, "pure" c++ code would be #include <stdio> eg

[Trad]

z00ey i think you got the wrong perspective on this.

you cant say

#include <stdio> is c++ code and
#include <stdio.h> is C code

C++ = C + More advanced things

everything available in C is available in C++. its all the same code (C++) just its a lot more advanced and there is more than one way to do things.

[z00ey]

nope, lol.. ..don t want to break up an argument, but exactly like i said

..the only reason why you can compile c code with c++ is to make it easier for ppl who learned/grew up with c to "step" up.. ..it s nonsense to teach someone who begins (using c++) c-code..

..and
#include <stdio> is c++ code
and
#include <stdio.h> is c code that can be compiled with c++ too (like printf and all the other stuff, no c++ code, but can be compiled with )

[Trad]

Ok i see your point now