Char to Float

Uh... what do you actually want the float to contain after the conversion?

ok

I reading text thats in a Edit box control but it stores the text into a char buffer.

I need to use the textnumbers in the buffer in my game as floats. Thats my problem

Oh, of course... use atof():

float i = atof(buff);
 

hmm that didn't really work

It just set it to 0

[edited by - Mat1515 on April 25, 2004 12:49:33 PM]

How didn't it work? Compiler errors? Incorrect results?
Note that you must #include <cstdlib> (or stdlib.h if you're not using C++) to tell the compiler that a such function exists.


[edited by - nonpop on April 25, 2004 12:52:07 PM]

It doesnt convert a char to a float, it converts a string of chars to a float.

See below

Clickers

Also, post the number that cont convert.


---------------------------------------------------------

check
out
these
pictures
of
mine

[edited by - Mulligan on April 25, 2004 12:55:36 PM]

Pshaw! I''ll just make a new post.

This works OK for me (VC++ toolkit 2003 compiler):

#include <cstdlib>
#include <iostream>

int main ()
{
	char buf[5];
	strcpy (buf, "0.01");
	float i = (float) atof (buf);
	std::cout << i << std::endl;     // prints 0.01

	return (0);
}

Your question is kind of ambiguous..

are the chars ASCII chars or are they bytes read from a binary file?

If they are ASCII chars and in the range 0..9 do this

float f = (float)( (int)charbuf[0] - (int)''0'' )

If it is binary data (?) you have to typecast the buffer

float f = *(float*)(charbuffer+ptr);
ptr += 4;
etc..

Your question really didn''t make alot of sense..

OK, I see what you were asking..

yes atof(...) will convert a NULL terminated string to a floating point number.

Sorry, I thought you wanted to individual characters (?) ( your example was clearly pointing to that ).

Peace

dkljsakjfas

Im getting angry.

This is what im trying to do

case WM_COMMAND:
		switch(LOWORD (wParam))
		{
		case IDOK:
			char buffer[5];
			GetDlgItemText(hwnd, IDC_EDIT1, buffer, 5);
			
			
				float i= (float)atof(buffer);
				g_Physics.GR.First = i;
			EndDialog (hDlg, 0);
			return TRUE;
			break;
		}
		break;
	}

It keeps freakin setting the float 2 zero when i type a number other than 0 into the edit box

Hokey dinah. It amazes me how many "conversion" threads there are, and it amazes me more that I'm the only one who ever posts the incredibly simple:

sscanf(mybuff, "%f", &myfloat);

[edited by - BriTeg on April 25, 2004 1:32:41 PM]

quote:

---

Original post by BriTeg
the incredibly simple:

sscanf(mybuff, "%f", &myfloat);

---

Simple and oh-so-ugly
atof() really should work. Have you checked that buff[] will contain the correct data after GetDlgItemText()?

What is that function doing I don''t want to create a string I want to take a string and turn it into a float

YOUR A GENIOUS nonpop!!!

THANKS IT WORKS NOWlol