[已解决]新手求助dll文件按照小甲鱼老师的教的写的，还是报错，请大神给看看

liuruijin

library Project2;

{ Important note about DLL memory management: ShareMem must be the
  first unit in your library's USES clause AND your project's (select
  Project-View Source) USES clause if your DLL exports any procedures or
  functions that pass strings as parameters or function results. This
  applies to all strings passed to and from your DLL--even those that
  are nested in records and classes. ShareMem is the interface unit to
  the BORLNDMM.DLL shared memory manager, which must be deployed along
  with your DLL. To avoid using BORLNDMM.DLL, pass string information
  using PChar or ShortString parameters. }

uses
  SysUtils,
  Classes;

{$R *.res}

Function max(x,y,z:integer):integer;StdCall;
var
t: integer;
begin
if(x<y) then
t:=y
else
t:=x;

if(t<z) then
t:=z
else
max:=t;
end;

Function min(x,y,z:integer):integer;StdCall;
var
t: integer;
begin
if(x>y) then
t:=y
else
t:=x;
if(t>z) then
t:=z
else
min:=t;
end;
exports
max,min;
begin
end.

最佳答案

月排行榜 / 总排行榜

ba21

2019-5-17 21:53:50

2个提示而已。不过话说，这是你自己写的代码吧。不要把责任推给小甲鱼老师。
一个函数要在任何时候都有返回值。比如说你这个

Function max(x,y,z:integer):integer;StdCall;
var
t: integer;
begin
  if x<y  then
    t:=y
  else
    t:=x;

  if t<z  then
    t:=z;

  max:=t;
end;

对比下，你的函数保证能在任何情况下都有返回值吗？

跳转到最佳答案楼层

liuruijin

老提示value assigned to 't' never used   return value of function 'max'  might be undefined;

ba21

2个提示而已。不过话说，这是你自己写的代码吧。不要把责任推给小甲鱼老师。
一个函数要在任何时候都有返回值。比如说你这个

Function max(x,y,z:integer):integer;StdCall;
var
t: integer;
begin
  if x<y  then
    t:=y
  else
    t:=x;

  if t<z  then
    t:=z;

  max:=t;
end;

对比下，你的函数保证能在任何情况下都有返回值吗？

cplus

cplus

你好，楼主，问题解决了，请结帖！