Fahrenheit...

...to celsius. What is the formula for conversion from F to C and C to F? Thanks all :D !

First off, google

Anyway....

http://www.condoconcepts.com/convers.htm

http://vathena.arc.nasa.gov/curric/w.../fahrcels.html

http://www.nomoreodor.com/fahrenheit...conversion.htm


etc...

This is what I've always wondered and haven't been able to find a good answer.

The Celsius scale is based off of the freezing and boiling point of water. What the hell is Fahrenheit based off of?

Quote:

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Originally posted by Thantos
This is what I've always wondered and haven't been able to find a good answer.

The Celsius scale is based off of the freezing and boiling point of water. What the hell is Fahrenheit based off of?

---

http://www.gi.alaska.edu/ScienceForum/ASF13/1317.html

It's a wonder what a little googling can accomplish.

OK, I must be missing somethign real simple here, but what the hell is wrong here:

Code:

---

#include <iostream>
using namespace std;

int main() {
        int h = 105, l = 95;
        cout << h << " " << l << endl;
        h = (5 / 9) * (h - 32);
        l = (5 / 9) * (l - 32);
        cout << h << " " << l;
        h = (9 / 5) * (h + 32);
        l = (9 / 5) * (l + 32);
        cout << h << " " << l;
        return 0;
}

---

Thanks all :D .

Ah ha! They should be float's huh! I think I solved it...

EDIT: So heres what I got, but it isnt accurate enough. How could I make it more accurate? Thanks all!

Code:

---

#include <iostream>
using namespace std;

int main() {
        int h = 105, l = 95;
        cout << h << " " << l << endl;
        h = (5.0f / 9.0f) * (h - 32);
        l = (5.0f / 9.0f) * (l - 32);
        cout << h << " " << l << endl;
        h = (9.0f / 5.0f) * h + 32;
        l = (9.0f / 5.0f) * l + 32;
        cout << h << " " << l;
        return 0;
}

---

EDIT 2:
Alright, what you want a float, you put an f after teh integer, what do you put for doubles? This is more accurate, but i dont want a variable for 5 and 9, and this still isnt accurate enough! Thanks all!

Code:

---

#include <iostream>
using namespace std;

int main() {
        int h = 105, l = 95;
        double d = 5, d2 = 9;
        cout << h << " " << l << endl;
        h = (d / d2) * (h - 32);
        l = (d / d2) * (l - 32);
        cout << h << " " << l << endl;
        h = (d2 / d) * h + 32;
        l = (d2 / d) * l + 32;
        cout << h << " " << l;
        return 0;
}

---

Quote:

---

Originally posted by Thantos
What the hell is Fahrenheit based off of?

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It's got something to do with cooking Spaghetti-o's, IIRC.

Quote:

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Originally posted by Thantos
What the hell is Fahrenheit based off of?

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It was designed so that the average human body temperature would be 100.0... someone just screwed up a bit in the lab.

Quote:

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Originally posted by Lurker
EDIT: So heres what I got, but it isnt accurate enough. How could I make it more accurate? Thanks all!

Code:

---

        int h = 105, l = 95;

---

---

There's your problem. You're still saving those temperature calculations into integers, thus losing a good deal of accuracy. Just make 'em doubles.

Duhduhduh....thanks man, thats what I needed :D .

Quote:

---

Originally posted by Thantos
This is what I've always wondered and haven't been able to find a good answer.

The Celsius scale is based off of the freezing and boiling point of water. What the hell is Fahrenheit based off of?

---

Its based off of the fact that it is the "proper" temperature scale. Well, if you are old(ish). :)

>>Alright, what you want a float, you put an f after teh integer, what do you put for doubles?

You put nothing after a number for it to be a double.