Delphi的语法问题 - Delphi / 语言基础/算法/系统设计

例子程序见附件，用Delphi 7进行编译

问题代码为 

Delphi(Pascal) code:
if Node.ChildNodes <> nil then
begin
for i := 0 to Node.ChildNodes.Count - 1 do
begin
cNode := Node.ChildNodes.Get(i);
shapetype := cNode.NodeName;
if (shapeType = 'line') then
begin
shape := TLine.Create;
shape.ShapeType := shapetype;
shape.Name := cNode.AttributeNodes.Nodes['name'].NodeValue;
TLine(shape).X1 := cNode.AttributeNodes.Nodes['x1'].NodeValue;
TLine(shape).Y1 := cNode.AttributeNodes.Nodes['y1'].NodeValue;
TLine(shape).X2 := cNode.AttributeNodes.Nodes['x2'].NodeValue;
TLine(shape).Y2 := cNode.AttributeNodes.Nodes['y2'].NodeValue;
try
TLine(shape).Color := StringToColor(cNode.AttributeNodes.Nodes['color'].NodeValue);
except
TLine(shape).Color := ClBlue;
end;
end
else if (shapeType = 'rectangle') then
begin
shape := TRectangle.Create;
shape.ShapeType := shapetype;
shape.Name := cNode.AttributeNodes.Nodes['name'].NodeValue;
TRectangle(shape).X1 := cNode.AttributeNodes.Nodes['x1'].NodeValue;
TRectangle(shape).Y1 := cNode.AttributeNodes.Nodes['y1'].NodeValue;
TRectangle(shape).X2 := cNode.AttributeNodes.Nodes['x2'].NodeValue;