Counting WhitespacesWords Characters Lines in file LEX Program

Compiler Construction Lab Manual / Counting WhitespacesWords Characters Lines in file LEX Program

Program Name

Write a Compiler Construction Program for Counting WhitespacesWords Characters Lines in file LEX Program.

Theory
Counting WhitespacesWords Characters Lines in file LEX Program

Program Code


%{	
int c=0,w=0,l=0,s=0;
%}
%%
[^ \t\n]+ w++;c+=yyleng;
[\n] l++;
[ \t]  s++;
%%
int main(int argc,char *argv[])
{
yyin=fopen(argv[1],"r");
yylex();
printf("\n the no.of character %d",c);
printf("\n the no.of words %d",w);
printf("\n the no.of lines%d",l);
printf("\n the no.of space %d",s);
fclose(yyin);
}
int yywrap(void) { return 1; }

Saving: vi CWWCL.l

Compiling and Running
lex CWWCL.L
cc lex.yy.c
./a.out a.txt

Input
Create a text file a.txt and enter data.

Vi a.txt
Prasad created this file1234 a1234
abcd

Output
the no.of character 34
the no.of words 6
the no.of lines2
the no.of space 4

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