how do i write and compile a c program?

[Nobody/Anonymous]

is this possible to write this program with notepad++, and how?

#include <stdio.h>
main()
{
printf("hello world\n");
}

[Nobody/Anonymous]

It's possible (and perhaps a good idea) to write your source code in Notepad++.

However, to actually compile the program into an executable (a working binary, for example "file.exe") you will need a compiler.
That source code is C so I suggest you use a C/C++ compiler; my personal preference being Dev-C++ (also free :) ).

http://www.bloodshed.net/devcpp.html
(just ask google if this fails you)

I really only know a little C++ myself. If you have trouble with that code you could also try

#include <iostream>
using namespace std;
int main() {
cout<<"Hello, Scotland!"<<endl;
cin.get();
return 0;
}