Count the number of Word character lines

#include <stdio.h>
#define STOP ' | '
#include <ctype.h>
int main ()
{
Char ch;
Char prev;
long n_chars=0l;
int n_lines=0;
int p_lines=0;
int n_words=0;
bool Inword=false;
printf ("Enter text to is Test (| to quit) \ n ");

While ((Ch=getchar ())!=stop)
{
n_chars++;
if (ch== ' \ n ')
{
n_lines++;
}

////The following two if mutual restriction is mainly to control the beginning and end of a word
if (!isspace (CH) &&!inword)
{
inword=true;
n_words++;
}
if (isspace (CH) &&inword)
{
Inword=false;
}

Prev=ch;
}
if (prev!= ' \ n ')
p_lines++;
printf ("Character=%ld lines=%d plines==%d words=%d", n_chars,n_lines,p_lines,n_words);
}

Count the number of Word character lines