写 Delphi 程序 输入一个整数n,计算1~n之间的平方和,立方和,偶数和
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procedure TForm1.Button1Click(Sender:TObject);
var
v_Index,N:Integer;
SquareSum,CubeSum,EvenSum:Integer;
ibegin ,iEnd :integer;
begin
N := StrToIntDef(Edit1.Text,0);
SquareSum := 0;
CubeSum :=0;
EvenSum := 0;
if (n < 1)
begin
iBegin := N;
iEnd := 1;
end
else
begin
iBegin := 1;
iEnd := N;
end;
for v_Index := iBegin to iEnd do
begin
SquareSum := SquareSum + v_Index * v_Index;
CubeSum := CubeSum + v_Index * v_Index * v_Index;
if v_Index mod 2 = 0 then
begin
EvenSum := EvenSum + v_Index;
end;
end;
ShowMessage('1~' + IntToStr(N) + '的平方和:' + IntToStr(SquareSum) + ','+#10#13
+ '立方和：' + IntToStr(CubeSum) + ',' + #10#13 +
'偶数和:' + IntToStr(EvenSum));
end;
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