如果用四舍五入就没问题了 为什么有了保护位,精度反而下降了? 保护位保护的是652.0和7.4765625这里面的数字,而未必是原来数字的精度
A new deterministic floating-point arithmetic called precision arithmetic is developed to track precision for arithmetic calculations. It uses a novel rounding scheme to avoid excessive rounding error propagation of conventional floating-point arithmetic. Unlike interval arithmetic, its uncertainty tracking is...
浮点数就是小数点位置不固定的数,也就是说与定点数不一样,浮点数的小数点后的小数位数可以是任意的,根据IEEE754-1985(也叫IEEE Standard for Binary Floating-Point Arithmetic)的定义,浮点数的类型有两种:单精度类型(用4字节存储)和双精度类型(用8字节存储)。 存储方式 要理解浮点数的存储方式,首先要从科学技术...
2. Fixed-precision floating-point arithmetic A b-bit floating-point number is a real number of the form 2 e f where e and f are integers with |f| < 2 b . Theorem 2.1. Let b be a nonnegative integer, and let k be an integer. Let x be a ...
1. 【数】浮点的 释义: 全部,浮点的,浮点数,浮点型,浮点运算 1. Auser-definedfunctionis said to bepreciseifit does notinvolveanyfloatingpointoperations. 如果用户定义函数不涉及任何浮点操作,就称其为精确函数。 www.ecd123.com 2. ManyofthefamiliaralgebraicrulesforRealnumberarithmeticdonotalwaysholdforfloat...
Builders of computer systems often need information about floating-point arithmetic. There are, however, remarkably few sources of detailed information about it. One of the few books on the subject, Floating-Point Computation by Pat Sterbenz, is long out of print. This paper is a tutorial on ...
IEEE Floating-Point Arithmetic IEEE arithmetic is a relatively new way of dealing with arithmetic operations that result in such problems as invalid, division by zero, overflow, underflow, or inexact. The differences are in rounding, handling numbers near zero, and handling numbers near the machine...
Floating-point arithmetic may give inaccurate results in Excel Forms InfoPath Installation Loop Mobile Office for Mac Office Suite Issues OneNote Outlook Performance Planner PowerPoint Project Publisher Settings Third party add-ins Visio Word Office Developer...
of graphics.It's important to note that floating-point arithmetic can introduce rounding errors because computers can only store and compute floating-point numbers with finite precision. While this error is tolerable in most applications, special care must be taken when high precision is required.
Arithmetic Operations (Floating Point) 项目 2007/12/31 Microsoft SpecificThe operations listed in the following table are followed by descriptions of each intrinsic.SSE2 intrinsics use the __m128, __m128i, and __m128d data types, which are not supported on Itanium Processor Family (IPF) ...