using namespace oadl; proc main() { var a = {{1,2,3},{4,5,6},{7,8,9}}; var b = @a; var c = @@a; "a:\n", a, "\n"; b[1][1] = 50; "a after b[1][1] = 50:\n", a, "\n"; "b = @a:\n", b, "\n"; "c = @@a:\n", c, "\n"; }