go :- repeat, printt('Enter a number '), get0(Num), nl, ( ; ).
Standard input is empty
/home/6hCY5V/gplcyiu3gb.o: In function `predicate(go/0)': (.text+0x43): undefined reference to `predicate(printt/1)' collect2: ld returned 1 exit status compilation failed
Standard output is empty