define decimal point

I ran into a problem today when I wrote the program. about how to control floating-point numbers only two digits after the decimal point, the normal idea is to use the round function, such as round (A, 2), but in the face of the following problems

It's always strange why a decimal is added to the pre-defined data type of C #. Isn't float and double enough? I am going to dig it out today. Floating Point Type    Name  CTS Type  De script ion  Significant Figures  Range

Floating point Type name cts Type description significant Figures range (approximate) float system.single 32-bit single-precision floating point 7

It's been weird. Why is a decimal added to the predefined data types of C #, and is it enough to have float and double? Come and dig a hole today. Floating-point type Name CTS Type De script ion Significant figures Range

Transferred from: http://www.cnblogs.com/lovewife/articles/2466543.htmlSingle precision refers to a 4-byte floating-point number, which is the floatA double is a 8-byte floating-point number, which is doubleDecimal is a high precisionFloating point

Decimal (numeric) synonymous with the exact storage of numeric values. The decimal data type can store up to 38 digits, and all numbers can be placed to the right of the decimal point. The decimal data type stores an accurate (accurate) numeric

We all know that in the program language and the database of various numeric types decimal,numeric,float,double,real ..., sometimes inadvertently will be a problem, in addition to mastering the basic principles of data storage, but also to carefully

In MySQL data types, such as Int,float,double,char,decimal, and so on, they all have their own role, below we will mainly introduce the MySQL data type of the role and use of the decimal type.The value that is normally given to a floating-point

In MySQL data types, such as INT, FLOAT, DOUBLE, CHAR, and DECIMAL, they all have their respective functions, next we will mainly introduce the role and usage of the DECIMAL type in the MySQL data type. Generally, the value of the floating point

1.PowerDesigner Setting up the database 2. Set the self-increasing properties of the database 3. Set the default value out, will be comment also selected to 4. Matters needing attention 1, no longer one of the two tables in the library can