I am trying to write a prolog code to find Bezout constants for gcd.
I tried this code :
gcdCoef(A,B,X,Y) :- Z is A*X + B*Y, gcd(A,B,Z).
but when I Execute the query ?- gcdCoef(12,20,M,N). it gives me the error :
"is/2: Arguments are not sufficiently instantiated"
Note that gcd works properly : gcd(A,B,Z) means gcd(A,B) = Z
what should I do to fix the issue?