Goal print_countries.
, , fail print_countries . , print_countries .
4. .
predicates
solve(real, real, real) %
reply(real, real, real) %
mysqrt(real, real, real) %
equal(real, real) %
clauses
solve(A, B, C): D = B*B-4*A*C, %
reply(A, B, D), nl.
reply(_, _, D): D < 0, write("No solution"),!.
reply(A, B, D): D = 0, X=-B/(2*A), write("x=", X),!.
reply(A, B, D):
sqrt(D, D, SqrtD),
X1 = (-B + SqrtD)/(2*A),
X2 = (-B SqrtD)/(2*A),
write("x1 = ", X1," and x2 = ", X2).
Goal solve(3,4,5).
5. . .
. . . , , , , . , , . , , . , . . , . (: ).
Predicates
Cat(string)
Dog(string)
Color(string,string)
Have(string,string)
Rod(string)
Animal(string)
Clauses
Cat(butsi). cat(korni). cat(mac).
dog(rover). dog(fles). dog(spot).
Color(butsi,brown).
Color(korni,black).
Color(mac,yellow).
Color(rover,yellow).
Color(spot,white).
color(fles,black_and_white).
have(tom,X):color(X,black); color(X,brown).
have(keit,X):dog(X), not(color(X,white)), not(have(tom,X)).
have(alan,mac):not(have(keit,butsi)), not(rod(spot)).
rod(X):animal(X), have(tom,X).
rod(X):animal(X), have(keit,X).
animal(X):cat(X); dog(X).
Goal animal(X),not(have(_,X)),write(X).
, , , . , , , .
6. . H :
Domains
N, F=real
Predicates
Factorial(N,F)
