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YYTF cnstruction machine reinforced steel bar cutting tool GQ40A
600 - 1,200
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Place of Origin:
Henan, China (Mainland)
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Engineers available to service machinery overseas
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wooden case
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15 days after payment
&&&&&&&&&&&&&&&&& YYTF cnstruction machine reinforced& steel bar cutting tool& GQ40A Product Description&. Reinforced steel cutting machine GQ40A has&gear uses rolling bearing, low frication, could save 1/3 power .. Construction&bar steel cutting machine GQ40A's gear shafts are produced by our own CNC processing center, high quality and steady performance.. Reinforced construction rebar cutter GQ40A &can cut flat steel, square steel and angle steel.:& Reinforced bar steel cutting machine has compact structure, high corrosion resistance& . The machine has passed ISO, it's quality is reliable.&&&&&&& &&&&Quality ControlTimely Delivery&&&&&&&&Packaging & Shipping&&&&&&&&&&&&&&&
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aisn-detailC Programming Data Types
C Programming Data Types
In this tutorial, you will learn about data types and how to declare a variable in C programming.
In C programming, variables or memory locations should be declared before it can be used. Similarly, a function also needs to be declared before use.
Data types simply refers to the type and size of data associated with variables and functions.
Data types in C
Fundamental Data Types
Integer types
Floating type
Character type
Derived Data Types
This tutorial will focus on fundamental data types. To learn about derived data types, visit the corresponding tutorial.
Integer data types
Integers are whole numbers that can have both positive and negative values, but no decimal values. Example: 0, -5, 10
In C programming, keyword int is used for declaring integer variable. For example:
Here, id is a variable of type integer.
You can declare multiple variable at once in C programming. For example:
The size of int is either 2 bytes(In older PC's) or 4 bytes. If you consider an integer having size of 4 byte( equal to 32 bits), it can take 232 distinct states as: -231,-231+1, ...,-2, -1, 0, 1, 2, ..., 231-2, 231-1
Similarly, int of 2 bytes, it can take 216 distinct states from -215 to 215-1. If you try to store larger number than 231-1, i.e,+ and smaller number than -231, i.e, -, program will not run correctly.
Floating types
Floating type variables can hold real numbers such as: 2.34, -9.382, 5.0 etc. You can declare a floating point variable in C by using either float or double keyword. For example:
float accountB
double bookP
Here, both accountBalance and bookPrice are floating type variables.
In C, floating values can be represented in exponential form as well. For example:
float normalizationFactor = 22.442e2;
Difference between float and double
The size of float (single precision float data type) is 4 bytes. And the size of double (double precision float data type) is 8 bytes. Floating point variables has a precision of 6 digits whereas the precision of double is 14 digits.
Character types
Keyword char is used for declaring character type variables. For example:
char test = 'h'
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Here, test is a character variable. The value of test is &#39;h&#39;.
The size of character variable is 1 byte.
C Qualifiers
Qualifiers alters the meaning of base data types to yield a new data type.
Size qualifiers
Size qualifiers alters the size of a basic type. There are two size qualifiers, long and short. For example:
The size of float is 8 bytes. However, when long keyword is used, that variable becomes 10 bytes.
Learn more about .
If you know that the value of a variable will not be large, short can be used.
Sign qualifiers
Integers and floating point variables can hold both negative and positive values. However, if a variable needs to hold positive value only, unsigned data types are used. For example:
// unsigned variables cannot hold negative value
unsigned int positiveI
There is another qualifier signed which can hold both negative and positive only. However, it is not necessary to define variable signed since a variable is signed by default.
An integer variable of 4 bytes can hold data from -231 to 231-1. However, if the variable is defined as unsigned, it can hold data from 0 to 232-1.
It is important to note that, sign qualifiers can be applied to int and char types only.
Constant qualifiers
An identifier can be declared as a constant. To do so const keyword is used.
const int cost = 20;
The value of cost cannot be changed in the program.
Volatile qualifiers
A variable should be declared volatile whenever its value can be changed by some external sources outside the program. Keyword volatile is used for creating volatile variables.