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Title Lexical Analyser for languages like C,PASCAL etc. (Mini Project)
Author Jatin Rajpal
Author Email jatin911 [at] yahoo.com
Description A simulated lexical analyser for HLL like C,PASCAL etc. I have given a sample text file from which the source code reads the dummy
program n analyses it. The program can be extended by adding more.
Category C++ » Complier Development
Hits 37397
Code Select and Copy the Code
/* LEX.cpp */ /*PROGRAM TO IMPLEMENT LEXICAL ANALYSER ON C AS A LANGUAUGE */ # include <iostream.h> # include <conio.h> # include <fstream.h> # include <ctype.h> //header files # include <dos.h> # include <stdlib.h> # include <stdio.h> # include <string.h> # define MAX 50 # define ERROR 0 # define ID 1 # define KEY 2 # define DELIM 3 # define OP 4 //constant declarations # define DATA_TYPE 0 # define OPER 2 # define KWORD 4 # define RTYPE 5 # define NUM 6 int bcount=0; char *msg[]={"error!!","id","key","delim","oprtr","num"},token[MAX][MAX],lex[MA X][MAX],attr[MAX][MAX]; char *msg2[]={"data type","identifier","operator","special character","keyword","return type","number"}; char buff[MAX],spl[]={' ',',',';',' ','(',')','{','}'}; char *data[]={"int","char","float","long","unsigned","void"}; char oper[]={'+','-','*','/','%','=','|','^','<','>','<=','>=','<>'}; char keys[4][10]={{"begin"},{"end"},{"start"},{"int"}},row[2],col[2]; /********************FUNCTIONS************************/ void display(int symcount); //display function for symbol table int flush_buff(char buff[MAX]) { for(int i=0;buff[i]!='

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