%{
    #include <stdio.h>
    int word_count=0;
    int char_count=0;
    int line_count=0;
    int num_count=0;
 
}%
%%
\n {line_count++}
[0-9]+ {num_count++;char_count+=yyleng}
[a-zA-Z_][a-zA-Z0-9_]*{word_count++;char_count+=yyleng}
%%
int main(){
    printf("enter input ;\n");
    yylex();
    printf("Lines      : %d\n", line_count);
    printf("Words      : %d\n", word_count);
    printf("Numbers    : %d\n", num_count);
    printf("Characters : %d\n", char_count);
    return 0;
}
int yywrap(){
    return 1;
}
 
 

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