foo.cc: In function ‘int countKeyword(char*, char*)’:
foo.cc:31:36: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   31 |                 while (!('a' <= *p && *p <= 'z' || 'A' <= *p && *p <= 'Z'))
      |                          ~~~~~~~~~~^~~~~~~~~~~~