It just throws the decimal point away and that's because, again, these are ints and the answer intuitively should be a floating point value, but I need to be more specific.

它直接把小数点后面的数值丢弃掉了，因为，凭直觉，那些整型数和结果应该是一个浮点数据，但是我需要一个更精确的数值。

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Converts the value of the specified decimal number to an equivalent double-precision floating-point number.

将指定的单精度浮点数的值转换为等效的双精度浮点数。

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Converts the value of the specified decimal number to an equivalent single-precision floating-point number.

将指定的双精度浮点数的值转换为等效的单精度浮点数。

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Converts the value of the specified decimal number to an equivalent single-precision floating-point number.

将指定的双精度浮点数的值转换为等效的单精度浮点数。

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