represent floating point as hexadecimal

[miinaturvat]

hello

 

I wish to write a program, preferably in C# but possibly VB, that when you enter a floating point value it gives you the hexadecimal representation of the float, and when you enter a hexidecimal number, it shows it's value as a float.

 

E.g 0x41200000 is 10 as a float. But what is 0x41200001 as a float? I want my program to do work this out.

 

Only problem is, I don't know how to do this!

 

Could someone help me out? like provide bits of code or something?

 

Thanks

[SmokiestGrunl]

All you need to do is work out the math. Do you know how to work them out?

[miinaturvat]

I have read up on IEEE 754 and sort of understand the math, but I don't know how to make a program do the math...

 

Is there a simple way of doing it?

 

Or maybe a class in C# that already does it?

[SmokiestGrunl]

Well whats the math? if you don't want to say it publicly tell me in a PM.

[miinaturvat]

Go here: http://www.h-schmidt.net/FloatApplet/IEEE754.html

 

I want to do that, but in C#

[SmokiestGrunl]

Its on the page.

 

Conversion: The value of a IEEE-754 number is computed as:

sign * 2exponent * mantissa

The sign is stored in bit 32. The exponent can be computed from bits 24-31 by subtracting 127. The mantissa (also known as significand or fraction) is stored in bits 1-23. An invisible leading bit (i.e. it is not actually stored) with value 1.0 is placed in front, then bit 23 has a value of 1/2, bit 22 has value 1/4 etc. As a result, the mantissa has a value between 1.0 and 2. If the exponent reaches -127 (binary 00000000), the leading 1 is no longer used to enable gradual underflow.

 

Do you know how to set variables, use mod, the signs, etc?

[miinaturvat]

Not very well...

 

I think I understand it, but have never programmed anything involving mantissa and exponents or anything.

[blacklabelfosho]

http://files.filefront.com/floatconvertzip...;/fileinfo.html

 

love me forever

[miinaturvat]

Thank you so much! I've been looking everywhere for this

[blacklabelfosho]

np anytime

 

thx for teh points