可能重复:
c# - 如何将十进制值四舍五入到小数点后 2 位(用于在页面上输出)
我想像下面这样截断小数
I want to truncate the decimals like below
即
double d = 2.22977777;
d = ( (double) ( (int) (d * 1000.0) ) ) / 1000.0 ;
当然,如果您尝试截断舍入误差,这将不起作用,但它应该适用于您在示例中提供的值.请参阅 this question 的前两个答案,了解为什么它不会有时工作.
Of course, this won't work if you're trying to truncate rounding error, but it should work fine with the values you give in your examples. See the first two answers to this question for details on why it won't work sometimes.
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