C++ is a strong language. In C++ we can compose structured programs and object-oriented programs also. C++ is a superset of C and in this manner most develops of C are lawful in C++ with their meaning unaltered. Be that as it may, there are some exceptions and additions.
Token: When the compiler is handling the source code of a C++ program, each gathering of characters isolated by void area is known as a token. Tokens are the littlest individual units in a program. A C++ program is composed utilizing tokens. It has the following tokens:
- Keywords
- Identifiers
- Constants
- Strings
- Operators
Keywords (also known as reserved words) have unique meaning to the C++ compiler and are constantly composed or typed in short(lower) cases. Watchwords are words that the language utilizes for a special reason, such as void, int, public, etc. It can’t be utilized for a variable name or function name. The following is the table for the complete arrangement of C++ keywords.
| asm | auto | break | case | catch | char | class | const |
| continue | default | delete | do | double | else | enum | extern |
| float | for | friend | goto | if | inline | int | long |
| new | operator | private | protected | public | register | return | short |
| signed | sizeof | static | struct | switch | template | this | throw |
| try | typedef | union | unsigned | virtual | void | volatile | while |
Note: The keywords not found in ANSI C are displayed here in boldface.
C++ keywords lists:-
auto: A capacity class specifier that is utilized to characterize objects in a block.
break: Terminates a switch statement or a circle.
case: Used specifically inside a switch statement to indicate a match for the statement’s demeanor.
catch: Specifies activities taken when an exception happens.
char: Fundamental data type that characterizes character objects.
class: To declare a user-defined type that exemplifies data members and tasks or member functions.
const: To characterize objects whose worth will not alter throughout the lifetime of program execution.
continue:- Transfers control to the beginning of a loop.
default:- Handles expression values in a switch explanation that are not taken care of by case.
delete: Memory deallocation administrator.
do: indicate the beginning of a do-while statement in which the sub-statement is executed over and again until the worth of the articulation is logical-false.
double: Fundamental data type used to characterize a floating-point number.
else: Used explicitly in an if-else statement.
enum: To pronounce a user-defined enumeration data type.
extern: An identifier indicated as extern has outside linkage to the block.
float:- Fundamental data type used to characterize a floating-point number.
for: Indicates the beginning of a statement to accomplish repetitive control.
friend: A class or activity whose execution can access the private data members of a class.
goto: Transfer control to a predefined label.
if: Indicate the beginning of an if statement to accomplish selective control.
inline: A function specifier that demonstrates to the compiler that inline substitution of the function body is to be liked to the standard function call execution.
int: Fundamental data type used to characterize integer objects.
long: A data type modifier that characterizes a 32-bit int or an extended double.
new: Memory distribution administrator.
operator: Overloads a c++ administrator with a new declaration.
private: Declares class individuals which are not noticeable outside the class.
protected: Declares class members which are private but to derived classes.
public: Declares class members who are visible external the class.
register: A capacity class specifier that is an auto specifier, yet which likewise shows to the compiler that an object will be frequently utilized and ought to therefore be kept in a register.
return: Returns an item to a function’s caller.
short: A data type modifier that characterizes a 16-bit int number.
signed: A data type modifier that demonstrates an object’s sign is to be put away in the high-order bit.
sizeof: Returns the size of an item in bytes.
static: The lifetime of an object-defined static exists throughout the lifetime of program execution.
struct: To proclaim new types that exemplify both data and member functions.
switch: This keyword utilized in the “Switch statement”.
template: defined or generic type.
this: A class pointer focuses to an object or case of the class.
throw: Generate a special case.
try: Indicates the beginning of a block of exception handlers.
typedef: Synonym for another basic or user-defined type.
union: Similar to a design, struct, in that it can hold various types of data, but a union can hold just one of its members at a given time.
unsigned: A data type modifier that demonstrates the high-order bit is to be utilized for an object.
virtual: A function specifier that pronounces a member function of a class that will be re-imagined by a derived class.
void: Absent of a type or function boundary list.
volatile: Define an object which might change in value in a way that is imperceptible to the compiler.
while: Start of a while statement and end of a do-while proclamation.
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