有个逻辑问题需要请教，总共8个价格，P1，P2，P3，P4，P5，P6，P7，P8。
需要判断这个8个价格中的最低价格，P1-P8的价格是随机的，其中有可能7个价格为0。
现在的难点就是，我需要判断这个8个价格中，非0价格的最低价格。
此程序如何实现，谢谢。
自己给自己解答吧，答案如下：（如果有运行效率更高的代码，请高手指教，多谢）if myBuyShortP>0 and myBuyShortP1>0 then myBuyShortP:=Max(myBuyShortP,myBuyShortP1);
else if myBuyShortP=0 then myBuyShortP:=myBuyShortP1;
if myBuyShortP>0 and myBuyShortP2>0 then myBuyShortP:=Max(myBuyShortP,myBuyShortP2);
else if myBuyShortP=0 then myBuyShortP:=myBuyShortP2;
if myBuyShortP>0 and myBuyShortP3>0 then myBuyShortP:=Max(myBuyShortP,myBuyShortP3);
else if myBuyShortP=0 then myBuyShortP:=myBuyShortP3;
if myBuyShortP>0 and myBuyShortP4>0 then myBuyShortP:=Max(myBuyShortP,myBuyShortP4);
else if myBuyShortP=0 then myBuyShortP:=myBuyShortP4;
if myBuyShortP>0 and myBuyShortP5>0 then myBuyShortP:=Max(myBuyShortP,myBuyShortP5);
else if myBuyShortP=0 then myBuyShortP:=myBuyShortP5;
if myBuyShortP>0 and myBuyShortP6>0 then myBuyShortP:=Max(myBuyShortP,myBuyShortP6);
else if myBuyShortP=0 then myBuyShortP:=myBuyShortP6;
if myBuyShortP>0 and myBuyShortP7>0 then myBuyShortP:=Max(myBuyShortP,myBuyShortP7);
else if myBuyShortP=0 then myBuyShortP:=myBuyShortP7;
if myBuyShortP>0 and myBuyShortP8>0 then myBuyShortP:=Max(myBuyShortP,myBuyShortP8);
else if myBuyShortP=0 then myBuyShortP:=myBuyShortP8;