This presentation is about Type Conversion, Precedence and Associativity which are important concepts for problem solving in programming languages like C, C++, Java, etc. It will surely help you to improve your knowledge.
Operators and expressions in c languagetanmaymodi4
what is operator in c language
uses of operator in c language
syatax of operator in c language
program of operator in c language
what is expressions in c language
use of expressions in c language
syantax of expressions in c language
Operators and expressions in c languagetanmaymodi4
what is operator in c language
uses of operator in c language
syatax of operator in c language
program of operator in c language
what is expressions in c language
use of expressions in c language
syantax of expressions in c language
A pointer is a variable whose value is the address of another variable, i.e., direct address of the memory location. Like any variable or constant, you must declare a pointer before you can use it to store any variable address.
There are few important operations, which we will do with the help of pointers very frequently. (a) we define a pointer variable (b) assign the address of a variable to a pointer and (c) finally access the value at the address available in the pointer variable. This is done by using unary operator * that returns the value of the variable located at the address specified by its operand.
A pointer is a variable whose value is the address of another variable, i.e., direct address of the memory location. Like any variable or constant, you must declare a pointer before you can use it to store any variable address.
There are few important operations, which we will do with the help of pointers very frequently. (a) we define a pointer variable (b) assign the address of a variable to a pointer and (c) finally access the value at the address available in the pointer variable. This is done by using unary operator * that returns the value of the variable located at the address specified by its operand.
An operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations.
C language supports a rich set of built-in operators. An operator is a symbol that tells the compiler to perform certain mathematical or logical manipulations. Operators are used in program to manipulate data and variables.
This is a little presentation for those interested in learning C#. I find it useful to present this to new clients to see where they are at in the the programming curve.
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An operator is a symbol that tells the computer to perform certain mathematical or logical manipulation on data stored in variables. The variables that are operated are termed as operands.
C operators can be classified into a number of categories. They include:
1. Arithmetic operators
2. Relational operators
3. Logical operators
4. Assignment operator
5. Increment and decrement operators
6. Conditional operator
7. Bitwise operators
8. Special operators
Now, let us discuss each category in detail.
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For more detailed information on delivering micro-credentials in TVET, visit this https://tvettrainer.com/delivering-micro-credentials-in-tvet/
A Strategic Approach: GenAI in EducationPeter Windle
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This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
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Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
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2. Type Conversion
What is Type Conversion?
• Type Casting or Type Conversion is a way to
convert a variable from one data type to another
data type.
• For example, if you want to store a long value
into a simple integer then you can type cast long
to int.
2
3. Type Conversion
Types of Type Conversion
• There are two types of type conversion –
1. Implicit Type Conversion
2. Explicit Type Conversion
3
4. 1. Implicit Type Conversion
What is Implicit Type Conversion?
• C automatically converts any intermediate values
to the proper type so that the expression can be
evaluated without losing any significance.
• This automatic conversion is known implicit type
conversion.
• If the operands are of different types, the ‘lower
type’ is automatically converted to the ‘higher’
type before the operation proceeds.
• The result is of the higher type.
4
5. Implicit Type Conversion
short char
int
Unsigned int
long int
Unsigned long int
float
double
long double
Conversion
Hierarchy
C uses rule that, in all expressions except assignments, any implicit type
conversions are made from a lower size to a higher size type as shown
below.
This hierarchy
can be used
while evaluating
expressions.
5
8. 1. Explicit Type Conversion
What is Explicit Type Conversion?
• The type conversion performed by the
programmer by posing the data type of the
expression of specific type is known as explicit
type conversion.
• The general form of a cast is :
(type-name) expression
• Here, ‘type-name’ is one of the standard C data
types and the expression may be a constant,
variable, or an expression.
8
9. Use of Explicit Type Casting
9
Example Action
X=(int)7.5
7.5 is converted to integer by
truncation.
a = (int)21.3/(int)4.5
Evaluated as (21/4) and the result
would be 5.
b = (double)sum/n Division is done in floating point mode.
y = (int)(a+b)
The result of (a+b) is converted to
integer.
z = (int)a+b
a is converted to integer and then
added to b.
p = cos((double)x) Converts x to double before using it.
12. Precedence & Associativity
What is Precedence?
• C has a precedence associated with it. This
precedence is used to determine how an expression
involving more than one operator is evaluated.
What is Associativity?
• The operators at higher level of precedence are
evaluated first.
• The operators of the same precedence are evaluated
either from ‘left to right’ or from ‘right to left’
depending on the level. This is known as the
associativity property of an operator.
12
13. Precedence & Associativity
13
Precedence rules decides the order in which
different operators are applied.
Associativity rule decides the order in which
multiple occurrences of the same level operator
are applied.
C Operators with their Precedence & Associativity
are listed in the following table.
14. 14
Operator Description Associativity Rank
()
[]
Function call
Array element
reference
Left to right 1
+
-
++
--
!
~
*
&
sizeof
(type)
Unary plus
Unary minus
Increment
Decrement
Logical Negation
Ones complement
Pointer reference
Address
Size of an object
Type cast
Right to left 2
*
/
%
Multiplication
Division
Modulus
Left to right 3
+
-
Addition
Subtraction
Left to right 4
<<
>>
Left shift
Right shift
Left to right 5
15. 15
Operator Description Associativity Rank
<
<=
>
>=
Less than
Less than or equal to
Greater than
Greater than or equal
to
Left to right 6
==
!=
Equality
Inequality
Left to right 7
& Bitwise AND Left to right 8
^ Bitwise XOR Left to right 9
| Bitwise OR Left to right 10
&& Logical AND Left to right 11
|| Logical OR Left to right 12
?: Conditional expression Right to left 13
16. 16
Operator Description Associativity Rank
=
*= /= %=
+= -= &=
^= |=
<<= >>=
Assignment
operators
Right to left 14
, Comma operator Left to right 15
17. Summary of operator precedence
17
‘Comma’ operator has lowest precedence.
‘Unary Operators’ are operators having highest
precedence.
Operators sharing common block in the above
table have equal priority or precedence.
While solving expression, equal priority operators
are handled on the basis of FIFO [First in First Out]
i.e., Operator Coming First is handled First.