LEX Program to count Words, lines and characters of input file

Problem Statement:-

Write a program using Lex specifications to implement lexical analysis phase of the compiler to count no. of words, lines, and characters of the given input file.

Source Code:

	vaibhav kumbhar
	3434
	PICT

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	%{
	int nlines,nwords,nchars;
	%}
	%%
	\n {
	nchars++;nlines++;
	}
	[^ \n\t]+ {nwords++, nchars=nchars+yyleng;}
	. {nchars++;}
	%%
	int yywrap(void)
	{
	return 1;
	}
	int main(int argc, char*argv[])
	{
	yyin=fopen(argv[1],"r");
	yylex();
	printf("Lines = %d\nChars=%d\nWords=%d",nlines,nchars,nwords);
	return 0;
	}

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Output:-

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