我们如何在脚本 (CPLEX/execute) 中使用集合（在 OPL 中定义）

Question

我在 OPL/CPLEX 中定义了一个这样的集合

{string} S1={"a","b","c"};
{string} S2= S1 diff {"a"}; //which return S2={"b","c"}; 

然后我想在脚本中执行此操作

execute {
`var m=Opl.item(S1,0);`    //which return a

var S3=S1 diff {m}; //或 var S3=S1 Opl.diff {m}; //但它不起作用 }

其实我需要cplex脚本中的Opl set函数，比如diff inter union等

我该怎么做？

提前谢谢你...

Answer 1

{string} S1={"a","b","c"};
{string} S2= S1 diff {"a"}; //which return S2={"b","c"}; 
{string} Sm;
{string} S3;
execute {
var m=Opl.item(S1,0);    //which return a
Sm.add(m);
S3=Opl.operatorDIFF(S1,Sm);
writeln(S3);
}

给予

{"b" "c"}