Write a Temperature class that has two instance variables: a temperature value (a floating-point number) and a character for the scale, either C for Celsius or F for Fahrenheit. The class should have four constructor methods: one for each instance variable (assume zero degress if no value is specified and Celsius if no scale is specified), one with two parameters for the two instance variables, and a no-argument constructor (set to zero degrees Celsius).
degreesC = 5 ( degreesF - 32 ) / 9
degreesF = ( 9 ( degreesC ) / 5 ) + 32
＊結果：
＝＞最後跑完結果似乎有點出錯，Ｃ、Ｆ轉換的數據錯誤了。不知道哪裡出了問題，還要再仔細看看。
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