int a[9][9] = {
{1, 2, 3, 4, 5, 6, 7, 8, 9} ,
{2, 4, 6, 8, 10, 12, 14, 16, 18} ,
{3, 6, 9, 12, 15, 18, 21, 24, 27} ,
{4, 8, 12, 16, 20, 24, 28, 32, 36} ,
{5, 10, 15, 20, 25, 30, 35, 40, 45} ,
{6, 12, 18, 24, 30, 36, 42, 48, 54} ,
{7, 14, 21, 28, 35, 42, 49, 56, 63} ,
{8, 16, 24, 32, 40, 48, 56, 64, 72} ,
{9, 18, 27, 36, 45, 54, 63, 72, 81} ,
};
which the array is called "a"
參考: google
my brain
my keyboard
my mouse
my computer
books
internet explorer
many more