Sum of elements below main diagonal of matrix: Difference between revisions
Sum of elements below main diagonal of matrix (view source)
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=={{header|Delphi}}==
{{works with|Delphi|6.0}}
{{libheader|SysUtils,StdCtrls}}
<syntaxhighlight lang="Delphi">
type T5Matrix = array[0..4, 0..4] of Double;
var TestMatrix: T5Matrix =
(( 1, 3, 7, 8, 10),
( 2, 4, 16, 14, 4),
( 3, 1, 9, 18, 11),
(12, 14, 17, 18, 20),
( 7, 1, 3, 9, 5));
function BottomTriangleSum(Mat: T5Matrix): double;
var X,Y,X2: integer;
var D: double;
begin
Result:=0;
for Y:=1 to 4 do
for X:=0 to Y-1 do
begin
D:=Mat[Y,X];
Result:=Result+D;
end;
end;
procedure ShowBottomTriangleSum(Memo: TMemo);
var Sum: double;
begin
Sum:=BottomTriangleSum(TestMatrix);
Memo.Lines.Add(IntToStr(Trunc(Sum)));
end;
</syntaxhighlight>
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69
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=={{header|Excel}}==
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