CD LAB 25-02-2020 no of id

no_of_id.l

%{
    #include <stdio.h>
    #include <stdlib.h>
    int nc=0;
%}
%option noyywrap
%%
[a-zA-Z_][a-zA-Z_0-9]* {nc++;}
.|\n { }
%%

int main(int argc, char* argv[]){
    if(argc != 2)
    {
        puts("Invalid arguments provided");
        return 1;
    }
    yyin = fopen(argv[1], "r");
    yylex();
    printf("No of identifiers: %d\n", nc);
    fclose(yyin);
}