!sudo apt instal flex bison
%{
    #include<stdio.h>
    int sc=0,lc=0,tc=0,wc=0,ch=0;
}%
%%
    [\n]{lc++;ch+=yyleng()}
    [ \t]{sc++;ch+=yyleng()}
    [ ^\t]{tc++;ch+=yyleng()}
    [^\t\n]{wc++;ch+=yyleng()}
%%
int yywrap(){
    return 1;
}
int main(){
    printf("Enter the sentence: ");
    yylex();
    printf("\nno. of words in given sentence :%d",wc);
    printf("\nno. of spaces in given sentence :%d",sc);
    printf("\nno. of tabs in given sentence :%d",tc);
    printf("\nno. of lines in given sentence :%d",lc);
    printf("\nno. of char in given sentence :%d",ch);
}

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