What is the win% for the game 80 and a PWin% of —, and a Term [c ] of 1987–1988?
CREATE TABLE "coaches" (
  "name_b" text,
  "term_c" text,
  "games" real,
  "winpct" real,
  "p_winpct" text
);
SELECT "winpct" FROM "coaches" WHERE "games"=80 AND "p_winpct"='—' AND "term_c"='1987–1988';