May 23, 2024 · Otherwise, if arg has integer type or the type double, ceil is called. Otherwise, ceilf is called. If no errors occur, the smallest integer value not less than arg, that is ⌈arg⌉, is returned. Errors are reported as specified in math_errhandling. The current rounding mode has no effect. If arg is ±∞, it is returned, unmodified.

Oct 15, 2023 · The library provides overloads of std::ceil for all cv-unqualified floating-point types as the type of the parameter.(since C++23) (See math-floating-point and deduced-simd-t for their definitions.) A) Additional overloads are provided for all integer types, which are treated as double.

Dec 1, 2022 · The ceil functions return a floating-point value that represents the smallest integer that is greater than or equal to x. There's no error return. ceil has an implementation that uses …

Otherwise, ceilf is called. If no errors occur, the smallest integer value not less than arg, that is ⌈arg⌉, is returned. Errors are reported as specified in math_errhandling. If the implementation supports IEEE floating-point arithmetic (IEC 60559), The current rounding mode has no effect.

Jan 29, 2024 · ceilf 是 C++ 标准库 中的一个函数，它属于 <cmath> （在 C 中是 <math.h>）头文件。 ceilf 函数的作用是返回不小于给定值的最小整数。 这里的“f”后缀表示该函数接受并返回 float 类型的值。 具体来说， ceilf 会对其参数进行上取整。 例如： 注意，对于负数， ceilf 会向“数值更大”的方向取整，也就是更接近零的方向。 这里有一个简单的例子： float x = 2.3; std::cout << "Ceiling of " << x << " is " << ceilf(x) << std::endl; return 0; 这段代码会输出： 但是要注意，由 …

These functions return the smallest integral value that is not less than x. For example, ceil (0.5) is 1.0, and ceil (-0.5) is 0.0. These functions return the ceiling of x. If x is integral, +0, -0, NaN, or …

Jun 5, 2017 · The ceil functions return a floating-point value that represents the smallest integer that is greater than or equal to x. There is no error return. ceil has an implementation that uses Streaming SIMD Extensions 2 (SSE2). For information and restrictions about using the SSE2 implementation, see _set_SSE2_enable.

Jan 31, 2013 · The ceil function returns a double value representing the smallest integer that is greater than or equal to x. There is no error return. ceil has an implementation that uses Streaming SIMD Extensions 2 (SSE2). See _set_SSE2_enable for information and restrictions on using the SSE2 implementation.

Rounds x upward, returning the smallest integral value that is not less than x. Header <tgmath.h> provides a type-generic macro version of this function. Value to round up. The smallest …

The largest representable floating-point values are exact integers in all standard floating-point formats, so this function never overflows on its own; however the result may overflow any …