#@title Writing Lex program
%%writefile program.l
 
%{
    #include <stdio.h>
    int ctChar=0;
    int ctSpace=0;
    int ctWord=0;
    int ctLine=0;
%}
WORD [^ \t\n,\.:]+
EOL [\n]
BLANK [ ]
%%
 
{WORD} {ctWord++; ctChar+=yyleng;}
{BLANK} {ctSpace++;}
{EOL} {ctLine++;}
. {ctChar++;}
%%
 
void main(int argc, char *argv[]){
    if(argc!=2){
        printf("Usage:\n\t./a.out <FILENAME>\n");
        exit(0);
    }
 
    yyin=fopen(argv[1],"r");
    yylex();
 
    printf("Word Count: %d\n",ctWord);
    printf("Character Count: %d\n",ctChar);
    printf("Space Count: %d\n",ctSpace);
    printf("Line Count: %d\n",ctLine);
    fclose(yyin);
 
}
 
int yywrap(){
    return 1;
}

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