Write a function program to generate a top down of magic 8 number as follow:
Write code C program
123456789x 8 + 9 = 987654321
  12345678x 8 + 8 = 98765432
     1234567x 8 + 7 = 9876543
        123456x 8 + 6 = 987654
           12345x 8 + 5 = 98765
              1234x 8 + 4 = 9876
                 123x 8 + 3 = 987
                   12x 8 + 2 = 98
                      1x 8 + 1 = 9