Array bounds

Pas2JS pascal source code


var az : array[0..4] of Integer;
     a : array[5..9] of Integer;


procedure ONE();
var
  i: Integer;
begin
  Writeln('zero-based array');
  for i := Low(az) to High(az) do
  begin
    az[i] := i;
    Writeln(IntToStr(i));
  end;
  try
    i     := -1;
    az[i] := 0;
  except
    on e:
    Exception do
      Writeln(e.Message);
  end;
  try
    i     := 5;
    az[i] := 0;
  except
    on e:
    Exception do
      Writeln(e.Message);
  end;
end;

procedure TWO()
var
  i: Integer;
begin
  Writeln('five-based array');
  for i := Low(a) to High(a) do
  begin
    a[i] := i;
    Writeln(IntToStr(i));
  end;
  try
    i    := 0;
    a[i] := 0;
  except
    on e:
    Exception do
      Writeln(e.Message);
  end;
  try
    i     := 10;
    az[i] := 0;
  except
    on e:
    Exception do
      Writeln(e.Message);
  end;
end;

begin

One;  // zero-based array 
      // 0,1,2,3,4
WriteLn('---------------');
Two; // five-based array
     // 5,6,7,8,9

var az = [0,0,0,0,0],
     a = [0,0,0,0,0];
	 
function TWO() {
 var i = 0;
 WriteLn("five-based array");
 for(i=5;i<=9;i++) {
	a[(i)-5] = i;
	WriteLn(i.toString());
 }
 try {
	i = 0;
	a[(i)-5] = 0;
 } catch ($e) {
	var e = $W($e);
	WriteLn(e.FMessage)         }
 try {
	i = 10;
	az[i] = 0;
 } catch ($e) {
	var e$1 = $W($e);
	WriteLn(e$1.FMessage)         }
};
function ONE() {
 var i$1 = 0;
 WriteLn("zero-based array");
 for(i$1=0;i$1<=4;i$1++) {
	az[i$1] = i$1;
	WriteLn(i$1.toString());
 }
 try {
	i$1 = -1;
	az[i$1] = 0;
 } catch ($e) {
	var e$2 = $W($e);
	WriteLn(e$2.FMessage)         }
 try {
	i$1 = 5;
	az[i$1] = 0;
 } catch ($e) {
	var e$3 = $W($e);
	WriteLn(e$3.FMessage)         }
};
ONE();
WriteLn("-----");
TWO();