home page
blog
training college
distinguished guest
app; application
Questions and answers
download
community
Recommended channel
activity
newcomer
special subject
Open the CSDN application.
Copyright? CSDN.NET, 1999-2020, all rights reserved.
c#
Open the application
Assignment reprinting of floating-point variables in c#
2007-08-25 17: 1 1:00
2 like it
qs_pds
Code age 17 years
watch out for
Assignment of floating-point variables in c#
In C#, there is a special case when assigning values to floating-point variables. sentence
Float y = 5.2// will not be compiled!
Compiler errors will occur, because a numerical constant with a decimal part like 3.5 will be considered as a double value with higher precision by C#, so the compiler will refuse to execute it because of the loss of precision. To make such an assignment, floating-point constants must be explicitly converted to floating-point values:
float y =(float)3.5； //No problem; Made a transformation.
Alternatively, you can use the suffix f to force the compiler to treat constants on the right side of assignment statements as floating-point values:
Floating y = 3.5F// Yes, we pointed out this constant.
//should be treated as floating-point values.
Another option is to directly use double variables instead of float variables to represent floating-point numbers. In SRS application, whenever we want to declare floating-point variables, we will use double instead, which can avoid type conversion operation.
A good idea: declare floating-point variables with double.
Open CSDN for a better reading experience.
Basic learning: C# _weixin_30859423 Range and precision of floating-point numbers in blogs -CSDN ...
By default, the real number to the right of the assignment operator is treated as a double number. Therefore, floating-point variables should be initialized with the suffix f or f, as shown in the following example: float x = 3.5F If the suffix is not used in the above declaration, a compilation error will occur because you try to store a double value in the float variable. Femoral length ...
Scope, precision, definition and assignment _ QQ _ 42675313blog _ c # float ......
Basic learning: the range and precision of float in C# 1072. By default, the real number on the right side of the assignment operator is regarded as double precision. So floating-point variables should be initialized with the suffix f or f, as shown in the following example: float x = 3.5F If you didn't use the suffix in the above statement, it's because you tried to put a ...
Assignment operator of C#
C# Assignment Operator Function: Initialize constants and variables, or assign values to variables. Assignment operators can not only assign values when declaring variables, but also assign values to initialized variables. If it is a change, please type variable name = value Variable name = new value.
Continue to visit
Variable types of c# namespace processentry32_C#
A variable is just the name of a storage area where the program runs. In C#, each variable has a specific type, and the type determines the memory size and layout of the variable. Values within the range can be stored in memory, and a series of operations can be performed on variables. The basic value types provided by C# can be roughly divided into the following categories: C# allows you to define variables of other value types, such as enum, and also allows you to define variables of reference types, such as class. Variable definition in C# Syntax of variable definition in C#: In this case, data_type must be with. ...
Continue to visit
C# Attribute Assignment Method _じ☆ve Warm Blog _c# Assignment
1. Look at the attribute type first. If it is the predefined 15 in C#, how to assign it directly? Move the mouse to the attribute and look at the first word in the prompt box 15 Attribute type: integer (8 kinds) digits: representing the range of integer values, and the power of 2 digits. Find out-1 is the most. ...
C# floating point (value type) _ strong _ Wen Zi's blog _c# floating point.
When developing software with C#, we need to use byte array and floating point number group conversion function. Among them, the byte array is a small end code. For future improvement, the record is as follows: byte [] data = ...; //byte array, get float[]float RR = new float[data. Length /4] Seen from the outside; // ...
The Method of Learning C Language —— Array
Array 1. 1 definition and reference of one-dimensional array1.1./definition of one-dimensional array In the C language, the array must be defined first. One-dimensional array is defined as: type descriptor array name [constant expression]; Where: the type descriptor is any basic data type or construction data type. The array name is a user-defined array identifier. Constant expressions in square brackets represent the number of data elements, also called the length of the array. For example: int a [10]; The integer array A has 10 elements. Floating point numbers b[ 10], c [20]; It shows that real array B has 10 elements and real array C has 20 elements.
Continue to visit
Solutions to some abnormal problems in Linux C.
Segment error 1.gdb debugging/library /b 1e65aza.aspx range b: 1.5e45 ~ 3.4e38 Source: C# Essentials 5.0 I don't know how to get 1.5e45. BCL Name: System. Single significant digit: ...
Continue to visit
Convert a string to a floating-point type in C#
Float. The Parse method is specially used in C# to convert strings to floating-point types. Common signature forms of floating point. The parsing method is static single parsing (string s s), where S represents the converted string. If the string cannot be converted to a floating-point type, the floating-point type. The Parse method will throw an exception. String str = "2.767 floating-point number = floating point. parse(str)； ...
Continue to visit
A popular recommendation method to judge whether two floating-point variables are equal and compare them with a value of 0.
Float type: 4 bytes, 7-bit significant digit double type: 8 bytes, 15 ~ 16-bit significant digit floating point number is not accurate, and neither float nor double can guarantee that all real numbers can be accurately stored in the computer. The test example is as follows: [CPP] view plain copy # include int main.
Continue to visit
C# Attribute Type and Assignment
Attribute type in C# (type 15): Bit indicates the value range of this type, which is the power of 2 digits, but the smallest positive integer in the computer is whether 0 is signed or not. Symbols represent positive and negative signs. Take half byte (8-bit unsigned integer) sbyte(8-bit signed integer) short( 16-bit signed integer) Usport (16-bit unsigned integer) int(32-bit signed integer) 2 147483647 uint(32-bit unsigned integer) Long (. ...
Continue to visit
Comparison between constant and 0 under floating point
Float is the keyword of data type in C language, which means single precision floating point number (double precision floating point number). The definition format is: float a；; C language stipulates that floating-point type occupies 4 bytes of memory, with an accuracy of 7 bits, and the range of values is: 3.4 *10-38 ~ 3.4 *10 38 or-(3.4 *10-38 ~ 3.4 *10. Such as # include
Continue to visit
Judging whether floating point numbers double/float are equal in the latest version of C#
Float, statement if (x
Continue to visit
Misunderstanding of floating point, double precision and decimal in C#
I've always wondered why a decimal should be added to the predefined data type of C#. Isn't it enough to have float and double Today, let's explore the CTS type of floating-point name.
Continue to visit
C language accurately assigns floating point numbers, C language floating point numbers
The concept of floating point number floating point number is also called decimal or real number. For example, 0.0, 75.0, 4.023, 0.27, -937. 198 are all legal decimals. This is a common decimal form, called decimal form. Use Float and double keywords to define decimals in C language. Float is called single precision floating point type, double is called double precision floating point type, and long double is a longer double precision floating point type. Any interval (for example, between 1.0 and 2.0) has an infinite number of real numbers, and the floating point number of the computer cannot represent this interval. ...
Continue to visit
Methods and steps of attribute assignment in C#
First look at the attribute type. If it is 15 predefined in C#, how do you think about direct assignment? Move the mouse over the attribute to see the first words 1 and 15 in the prompt box. Attribute type: (see fn+f12) (1) integer (8). Find out the sign that-1 is the maximum value: indicates whether the negative number sbyte (an 8-bit signed integer) can take (* * signed plus or minus half * *) byte (an 8-bit unsigned integer) (0~255)** Unsigned indicates that only positive numbers can be taken, not negative numbers * *. ...
Continue to visit
C language float is compared with zero value, and float floating point number is compared with zero value 0 with size ZZ.
Write an if statement comparing floatx with zero. Please write an if statement comparing float x with zero: const float epsilon = 0.00001; If ((x> =-epsilon)&; & (x< = epsilon) cannot use "= =" or "! Compared with numbers, = "should be converted into" >; = "or"
Continue to visit
How does c# assign a value to float?
c#
flotage
Write comments
comment
2
2
step on
share
Opening CSDN APP is a better reading experience.