scaner program!......plz

[camellikna]

hi!...i have a project in university about programing...can anyone send me a program of Scaner that recognize identifire and ...?...this program should be simple.....thx alot :x

[Ganon11]

The experts on this site are more than happy to help you with your problems but they cannot do your assignment/program for you. Attempt the assignment/program yourself first and post questions regarding any difficulties you have or about a particular function of the code that you don't know how to achieve.

Please read the Posting Guidelines and particularly the Coursework Posting Guidlines.

Then when you are ready post a new question in this thread.

MODERATOR

A Scanner is something used in Java...are you in the wrong forum?

[camellikna]

thx for your attention
i'll try...and i'll do it!...and i'll take it here in future
and i ask my question if i found a problem
thx

[Peterwkc]

Actually, what is your problem. I couldn't understand the program specification and function.


Have you finished the program. If not, we can discuss together.

Thanks for your explanation.

[camellikna]

What is a scanner?
The first step each PUMA application does is analysing the structure of the C/C++ source code. This analysis is divided into a lexical and a syntactical analysis. Well, the task of a scanner2.1 is to do the lexical analysis of the code. But what means lexical analysis in detail? The scanner reads the source code character by character and implements the following tasks:


recognizing of basic symbols (tokens) like C++ and preprocessor keywords,
encoding the tokens (map to integer) and
associating a token to a class of tokens - the language it belongs to (e.g. preprocessor and C++).
By the way the location the token occured in the source code will be stored. The result of the scan process is a logical unit of the tokens belonging to the input source of the scanner

...but I dont write in yet!...thx

[hollingsworthd]

OP, you're asking quite a difficult question... you must be in an automata course or maybe a compiler course...

Maybe you've covered something like this in the class?
http://en.wikipedia.org/wiki/Left_recursion

[camellikna]

I study computer :)

#include <iostream.h>
#include <conio.h>

main()
{{

int state=0,i;
char array[80],ch;
cin >>array[i];

l3:
for(int i=0;array[i]!='\0';i++){
switch(state){
case 0:
ch=array[i];
if(ch=='0' || ch=='1'|| ch=='2' || ch=='3' || ch=='4' || ch=='5' || ch=='6' || ch=='7' || ch=='8' || ch=='9')
state=3;

else if(ch=='a' || ch=='b'|| ch=='c' || ch=='d' || ch=='e' || ch=='f' || ch=='g' || ch=='h' || ch=='i' || ch=='j'|| ch=='k'|| ch=='l' || ch=='m' || ch=='n' || ch=='p' || ch=='q' || ch=='r' || ch=='s' || ch=='t'|| ch=='u'|| ch=='v' || ch=='w' || ch=='x' || ch=='y' || ch=='z' )
state=1;

else if(ch=='+')
state=12;

else if(ch=='-')
state=13;

else if(ch=='<')
state=14;

else if(ch=='!')
state=17;

else if(ch=='/')
state=20;

else if(ch==';')
state=25;

else if(ch=='*')
state=28;

else if(ch=='"')
state=29;

else if(ch=='>')
state=30;

else if(ch=='=')
state=33;


else if(ch==' ')
state=39;

else cout<<"!";

goto l3;
break;




----its frist state! :)...i think