I am trying to convert Fahrenheit to celcious using java, but something seems to be wrong with my code?

Question

Can anyone help me?, this is my code:

//identifier declarations


final int BOILING_IN_F = 212; // freezing temperature
int fToC;


// Convert Fahrenheit temperatures to Celsius

fToC = 5/9 * (BOILING_IN_F - 32);
output = BOILING_IN_F + " in Fahrenheit is " + fToC+ " in Celsius.";
System.out.println(output);
System.out.println();

Answer 1

variable type int is whole numbers only, no fractions. You need to declare them as type float.

Answer 2

It's a little hard to answer because you haven't stated what the problem is, however...

int fToC is being given a real result - won't work.

output = BOILING_IN_F + " in Fahrenheit is " + fToC+ " in Celsius.";

You are not declaring the variable "output" anywhere that I can see. Should be throwing a compiler error, so I wonder if you have it declared somewhere else.

If this is in fact where your problem lies, just put a type in front of the line I quoted. String should do.

Answer 3

fToC = 5/9 * (BOILING_IN_F - 32);

The variable and the constant values are all of type int!
Thus 5/9 is equal to zero!

And so it continues....

I would certainly change the constants to float!

Answer 4

I wonder if order of operations is screwed up? What is the output you get from this? I'm just wondering if what's happening is sort of like

5 / (9 * (BOILING_IN_F - 32)) giving you some ridiculous number like 0.0031?

maybe try explicitly going (5/9) * (BOILING_IN_F -32)... or instead just using (BOILING_IN_F -32) / 1.8 ?

Of course if it's syntax... I'm don't know Java so someone else would have to help with that...

Answer 5

it is -32 X 5 /9

Answer 6

i don't know java code but heres the math to convert C to F. F = (C x 9 / 5) +32.