Weight : 30

Due Date: 3rd Feb.
 Make FORTRAN 90 Source and output into one file and upload to
your HUxx account in MUSICB.
 EMAIL that file to HUAB on MUSIC B from your HUxx account.
This assignment has to be done in FORTRAN 90, using the LAHEY compiler,
which you can download for free from www.lahey.com
or this is available in the EMF.See the documentation on the LAHEY website
for installation and running programs on your own machine. Note your FORTRAN
90 source code should be the ELF90 directory with the compiler for easy
operation.


If A and B are two integers, any number that divides both A and B
is called a common divisor of A and B. For example, the common divisors
of 12 and 18 are 1,2,3,6. The largest of the divisors is called the GCD(Greatest
Common Divisor) of A and B. A procedure known as Euclid's algorithm is
one of the basic methods of elementary number theory. Suppose that A and
B are the two integer numbers. We divide B into A, using integer division,
finding a quotient Q and a remainder R. This means that

A = Q*B + R

Then we divide R into B and keep iterating until the remainder is 0. The
last nonzero divisor becomes the GCD.

For example, to find the GCD of 1976 and 1032


1976 = 1032 x 1 + 944

1032 = 944 x 1 + 88

944 = 88 x 10 + 56

88 = 56 x 1 + 32

56 = 32 x 1 + 24

32 = 24 x 1 + 8

24 = 8 x 3 + 0


The GCD of 1976 and 1032 is 8.


Find the GCD of following datas.



60 5280

139 49

3850 5280

1124 1472

17296 18416

76084 63020

13398 7854