System Software Lab Programs ( Lex and Yaac Programs )

System Software Lab Programs ( Lex and Yaac Programs )1b

Subject : System Software Laboratory

Branch : Information Science & Engineering

Semester : 6

University : VTU

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PART – A

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1b. Program to count the numbers of comment lines in a given C program. Also eliminate them and copy the resulting program into separate file.

%{
int c=0,state=1;
%}

%%
“/*” { state=0;}
“*/” { c++; if (!state) state=1;}
{ if (state==1)
fprintf(yyout,”%s”,yytext);
}
%%

FILE * fp;
main(int argc,char ** argv)
{
if(argc<=1)
{
printf(“\nNo file”);
exit(1);
}

fp=fopen(argv[1],”w”);

if(!fp)
{
printf(“\nNo output file”);
exit(1);
}

yyout=fp;

fp=fopen(argv[1],”r”);

if(!fp)
{
printf(“\nNo inpput file”);
exit(1);
}

yyin=fp;
yylex();
printf(“\nNumber of comment lines : %d”,c);
}

yywrap()
{
if(state==0)
{
printf(“\nUnterminated commennt”);
return 1;
}
}

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sandeephegde

Dear Shashank,

I have not eliminated any comments from the site. Which eliminated comments are you talking about?

Shashank

Hey Sandeep, I'm talking about the question which says that we need to eliminate the comments also along with counting no. of comments...Que goes like this:
Program to count the numbers of comment lines in a given C program. Also ELIMINATE them and COPY THE RESULTING PROG INTO SEPARATE FILE. Ur prog just counts the comments, the rest of the que is left unsolved...