Note that, in this example, sum must be initialized to an explicit floating-point value; otherwise, all the subsequent computations will be done using integer arithmetic.
注意，在本例中，sum必须被初始化为一个显式的浮点值；否则，所有后续计算都将使用整数运算计算。
In arithmetic the positive integer and the positive fraction were sufficient for all requirements.
在算数中，曾经正整数和正分数能够满足所有的需求。
In arithmetic the positive integer and the positive fraction were sufficient for all requirements.
在算数中，曾经正整数和正分数能够满足所有的需求。
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