c++四舍六入五留双c++c++
时间: 2023-10-18 16:54:35 浏览: 196
回答: 在C++中,四舍六入五留双的实现可以通过使用四舍五入函数来实现。C99标准中提供了round函数,可以对double类型进行四舍五入。函数原型为:double round(double x)。\[2\]另外,你也可以自己编写round函数,使用公式x=(int)(x+0.5)来实现四舍五入。\[3\]另外,如果你想保留小数位数,可以先将数字乘以相应的倍数,然后再除以相同的倍数来实现。例如,如果你想保留两位小数,可以将数字乘以100,然后再除以100。\[3\]希望对你有所帮助。
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