C++ Lex using CSharp is a system software ( Lexical Analyzer) project where the input program is broken down into many fragments called tokens. Basically lexical analysis involves scanning the program to be compiled and recognizing the tokens that make up the source statements. Scanners are usually designed to recognize keywords, operators, and identifiers, as well as integers, floating point numbers, character strings, and other similar items that are written as part of source program. The exact set of tokens to be recognized depends upon the ....etc

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Algorithm:-
begin
if a,e,I,o,u or A,E,I,O,U
then
printf It is a vowel
else
printf It is a consonant
end

1. LEX program to count number of vowels and consonants in a given input string

%%
{printf( it is vowel );}
{printf( it is consonant );}
%%
main()
{
yylex();
}
int yywrap()
{
return 1;
}

Output:

$./a.out
a
it is a vowel
g
it is a consonant ....etc

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Aim:
To write a C# program to perform encryption and decryption of the given data.

Algorithm
ALGORITHM FOR ENCRYPTION:
Step 1: Declare the class as encrypt_class.
Step 2: Start the main function.
Step 3: Declare the variable str in string data type.
Step 4: Create the object for inbuild encryption
algorithm TripleDESCryptoServiceProvider.
Step 5: Create the data file using Filestream
class.
Step 6: Create the object for class cryptoStream.
Cryptostream is a class to invoke the
Encryotor algorithm ....etc

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Algorithm:-

begin
if string=*000*
then
printf Algorithm:-

string accepted
else
printf string rejected
end

Program:-

LEX program to recognize a string with three consecutive 0 s

%%
*000* { printf( string accepted );}
* { printf( string rejected );}

%%

main()
{
yylex();
}\
int yywrap()
{
return 1;
}
....etc

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lex code for prime number

Lex is a computer program that generates lexical analyzers (scanners or lexers).Lex is commonly used with the yacc parser generator. Lex, originally written by Mike Lesk and Eric Schmidt and described in 1975,is the standard lexical analyzer generator on many Unix systems, and an equivalent tool is specified as part of the POSIX standard.Lex reads an input stream specifying the lexical analyzer and outputs source code implementing the lexer in the C programming language. ....etc

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to get information about the topic lex program to recognise and count number of identifiers in a given file related topic refer the page link bellow

http://seminarsprojects.net/Thread-program-in-%E2%80%9Clex%E2%80%9D-to-count-number-of-identifiers-and-keywords ....etc

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could you please send me the lex program to specify decimal numbers
....etc

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Prime number program in c: c program for prime number, this code prints prime numbers using c programming language. To check whether a number is prime or not see another code below. Prime number logic: a number is prime if it is divisible only by one and itself. Remember two is the only even and also the smallest prime number. First few prime numbers are 2, 3, 5, 7, 11, 13, 17..etc. Prime numbers have many applications in computer science and mathematics. A number greater than one can be factorized into prime numbers, For example 540 = 22*33*51 ....etc

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I need this program badly.This program is related with my class. So i need this quickly. This is related with compiler subjuct. ....etc

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To get full information or details of algorithm to find vowels and consonants please have a look on the pages

http://seminarprojectsprintthread.php?tid=25871

http://seminarsprojects.net/Thread-program-in-%E2%80%9Clex%E2%80%9D-to-count-number-of-vowels-and-consonants?pid=47647

http://seminarsprojects.net/Thread-program-to-identify-vowels-and-consonants-given-as-input

http://seminarsprojects.net/Thread-program-in-%E2%80%9Clex%E2%80%9D-to-count-number-of-identifiers-and-keywords?pid=47655&mode=threaded

if you again feel trouble on algorithm ....etc

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