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lex program for count character ,the word, space and new line in the given text file



/* deceleration section in this sections we will declared the different  value and include the header file which we are using in this program to run this program */

 %{
#include<stdio.h>
int nc_count=0;      // for count the character
int nw_count=0;     // for count the word
int ns_count=0;      // for count the space
int nl_count=0;      // count the line
%}

 /* this sections is known as defined section in which we defined the rule and regulation of regular expression which will going to accept or not */

%%
[ ]  {ns_count++;nw_count++;}
[\t]  {ns_count++;nw_count++;}
[\n]  {nl_count++;nw_count++;}
[a-zA-Z] {nc_count++;}

%%

/* main section for calling function */

 int main()
{
FILE *fp;
char file[10];
printf("enter the filename\n");
scanf("%s",file);
fp=fopen(file,"r");
yyin=fp;
yylex();
printf("character=%d\nword=%d\nSpace=%d\nLine=%d\n",nc_count,nw_count-1,ns_count,nl_count-1);
return 0;
}


How to run this program 
          open terminal  and run    " flex  ass1.2.l "
          it generates c file run      " cc lex.yy.c -o count   -ll  "  as out put  in file count
          now run   for output       " ./count "


                           

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