当时见到一张帖子即兴写了这段代码,还没认真调试过
program Project1;{$APPTYPE CONSOLE}uses SysUtils;const Key='TESTNET'; Cryptograph='有些事还是不知为妙';//不能为0.5,相加为1 Percent1=0.21; Percent2=0.79;var s1:string;function GetKey(aKey:string;aPercent:Double):string;var i:integer;begin SetLength(Result,Length(aKey)); for i:=1 to Length(aKey) do begin Result[i]:=Chr(Round(Ord(aKey[i])*aPercent)); end;end;function EnCode(aCryptograph,aKey:string):string;var i,keylen,codelen:integer;begin keylen:=Length(akey); codelen:=Length(aCryptograph); SetLength(Result, Length(aCryptograph)); for i:=1 to codelen do begin Result[i]:=Chr(Ord(aCryptograph[i])+Ord(aKey[(i mod KeyLen)+1])); end;end;function DeCode(aCryptograph,aKey:string):string;var i,keylen,codelen:integer;begin keylen:=Length(akey); codelen:=Length(aCryptograph); SetLength(Result, Length(aCryptograph)); for i:=1 to codelen do begin Result[i]:=Chr(Ord(aCryptograph[i])-Ord(aKey[(i mod KeyLen)+1])); end;end;begin { TODO -oUser -cConsole Main : Insert code here } WriteLn('要加密的文字'); WriteLn(Cryptograph); WriteLn; WriteLn('密码经过第一个网络'); s1:=EnCode(Cryptograph,GetKey(Key,Percent1)); WriteLn(s1); WriteLn; WriteLn('密码经过第二个网络'); s1:=EnCode(s1,GetKey(Key,Percent2)); WriteLn(s1); WriteLn; WriteLn('还原'); s1:=DeCode(s1,Key); WriteLn(s1); WriteLn; WriteLn('如果要在VCL控件中显示，还要对#0进行处理,'+ '因为VCL中大部分函数以#0作为结束标记'); ReadLn;end.
