If you want to round down any double to specific decimal places, if doesn´t matter if is the midpoint, you can use: public double RoundDownDouble(double number, int decimaPlaces) { var tmp = Math.Pow(10, decimaPlaces); return Math.Truncate(number * tmp) / tmp; } Share Improve t...
double x; printf( "Please enter a positive number that has a fractional part with three or more decimal places\n" ); scanf( "%lf", &x ); printf( "The number you have entered is %5.2f\n", x + 0.005 ); I'm pretty sure printf only truncates. So you will need to add...
这是我的公式: int a; int b; int c; double multiplier; amount = Convert.ToInt32(Math.Round(multiplier * a * (4 * b + c) / 100, 0)); 当我得到一个使它有一个小数点的.5或更大的值时,它是四舍五入。如何使这个等式舍入最终结果(并且我知道如何显示为字符串)? 浏览1提问于2014...
C/C++ : converting std::string to const char* I get the error : left of '.c_str' must have class/struct/union type is 'char *' C# to C++ dll - how to pass strings as In/Out parameters to unmanaged functions that expect a string (LPSTR) as a function parameter. C++ int to str...
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1.首先解释一下“语句写一次就行了,对之后的数字都有效”。在s之后设置保留两位小数之后,重新声明另一个数,输出依旧显示两位小数。所以设置精度语句只需写一次就可以了。 代码语言:javascript 复制 #include<iostream>#include<iomanip>//设置必备的头文件using namespace std;intmain(){double s=12.345;cout<<seti...
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Efficient binary-decimal and decimal-binary conversion routines for IEEE doubles. - double-conversion/double-conversion/strtod.cc at b1d531bfb130e7149ffe24bb0f1c5c01f20c3a5f · google/double-conversion
cds() — Compare double and swap cdump() — Request a main storage dump ceil(), ceilf(), ceill() — Round up to integral value ceild32(), ceild64(), ceild128() — Round up to integral value __certificate() — Register, deregister, or authenticate a digital certificate c...
ceil ceil ceil函数用于对a进行向上舍入最接近的整数。 命令格式 ceil(DOUBLE a) 参数说明 表1 参数说明 参数 是否必选 参数类型 说明 a 是 DOUBLE、BIGINT、DECIMAL、STRING类型。 参数a的格式包括浮点数格式、整数格式、字符串格式。 参 来自:帮助中心 查看更多 → ...