Pract 7: Write a Lex program to recognize whether a given sentence is simple or compound.

%{
#include<stdio.h>
int is_simple=1;
%}
%%
[   \t\n]+[aA][nN][dD][   \t\n]+ {is_simple=0;}
[   \t\n]+[oO][rR][   \t\n]+ {is_simple=0;}
[   \t\n]+[bB][uU][tT][   \t\n]+ {is_simple=0;}
. {;}
%%
int yywrap()
{
return 1;
}

main()
{
int k;
printf(“Enter the sentence.. at end press ^d”);
yylex();
if(is_simple==1)
{
printf(“\nThe given sentence is simple”);
}
else
{
printf(“\nThe given sentence is compound”);
}
}