5.3 Solutions

1. 12 x 21 = 252
2. 10 x 21 = 210
3. 11 x 11 = 121
4. 5 x 5 x 5 = 125
5. 9 x 6 = 54

1. The name of the array is missing. Should be something like:

   var a : array 1 .. 10, 0 .. 4 of real

2. low and high should be defined constants. Should be something like:

   const LOW := 1
   const HIGH := 10
   var table : array LOW .. HIGH, LOW .. HIGH of char

3. Colon is missing and second index needs to go from low to high:

   var scores : array -5 .. 10, -10 .. 5 of int 

4. The word array is missing:

   var matrix : array 1 .. 10, 1..10 of real 

1.  

   4 3 2 1 8 7 6 5

2.  

   8 7 6 5 4 3 2 1

3.  

   1 5 2 6 3 7 4 8

4.  

   4 8 3 7 2 6 1 5

% 4a
var four : array 1 .. 3, 1 .. 5 of int

% 4b
for row : 1 .. 3
   for col : 1 .. 5
      four(row, col) := 0
   end for
end for

% 4c
var grandTotal : int := 0
for row : 1 .. 3
   for col : 1 .. 5
      grandTotal := grandTotal + four(row, col)
   end for
end for

% 4d
var row2sum : int := 0
for col : 1 .. 5
   row2sum := row2sum + four(2, col)
end for

% 4e
var col3sum : int := 0
for row : 1 .. 3
   col3sum := col3sum + four(row, 3)
end for

% 4f
var negSum : int := 0
for row : 1 .. 3
   for col : 1 .. 5
      if four(row, col) < 0 then
         negSum := negSum + four(row, col)
      end if
   end for
end for

% 4g
for row : 1 .. 3
   for col : 1 .. 5
      four(row, col) := four(row, col) ** 2
   end for
end for

% 4h
var largest : int := four(1, 1)
for row : 1 .. 3
   for col : 1 .. 5
      if four(row, col) > largest then
         largest := four(row, col)
      end if
   end for
end for