Test set 1 - Menu check
Test 1-1: Input invalid data into the menus

Test set 2 - Array addition
Test 2-1: Add the two matrixes:

 5.69 -13.56 -21.22
10.76  19.66  17.84
19.44  -5.05  12.52

and

-20.92 19.92 16.69
 -2.49 -6.59 11.94
 22.03 13.18 18.67

which add to

-15.23	6.36	-4.53
8.27	13.07	29.78
41.47	8.13	31.19

Test set 3 - Array multiplication
Test 3-1: Multiply

 5.69 -13.56 -21.22
10.76  19.66  17.84
19.44  -5.05  12.52

by

-20.92 19.92 16.69
 -2.49 -6.59 11.94
 22.03 13.18 18.67

which equals

-552.747	-76.9744	-463.1177
118.9626	319.911		747.3976
-118.2947	585.5379	497.905

Test 3-2: Multiply

-5 -7  5
 0  8 -7
 8  0  9

 by

-5 10  1
-4 -7  8
-5  2 -4

which equals

28	9	-81
3	-70	92
-85	98	-28

Test 3-3: Multiply

-5 10  1
-4 -7  8
-5  2 -4

by

-5 -7  5
 0  8 -7
 8  0  9

which equals

33	115	-86
84	-28	101
-7	51	-75