Square Root - sqrt?

[floppes]

Hi!

I'm very new to VC++ and need to get the square root of a number.

In VB i would use Sqrt(n)... but how in VC++?

I am making an MFC application.

[parksie]

Are you new to C++ or Windows programming with C++ I would SERIOUSLY suggest if the former, that you learn the language before trying to use MFC. Actually, scrap MFC altogether and use the API But in answer to your question...

#include <iostream>
#include <cmath>

using namespace std;

int main() {
    float fNum = 5.4f;

    cout << sqrt(fNum) << endl;

    return 0;
}

http://www.cplusplus.com/ref/cmath/sqrt.html

[floppes]

I read a book about C++ (Jesse Liberty - Teach yourself C++ in 21 Days). Ok, I read until day 6

On its CD was an online version of "Teach yourself Visual C++ in 21 days", and I have started with this today (I'm on day 3).

I don't have problems with the C++ syntax, I can already program in PHP, HTML, VB and Delphi.

I only wanted to write a short pi-algorithmus with Visual C++, and needed the square root function. I forgot this line: #include <cmath>

Now it works, thanks for your help!

[parksie]

Just don't trip up on pointers and inheritance which is something that MFC uses in spades and can really mess you up.