[Help-glpk] How to retrieve the value for a specific variable?

[陈 怡蓓]

Hi List,
I'm trying to integrate the GLPK to my own application. I'd like to know 
what APIs I can use to retrieve the value for a specific variable or a 
parameter when using MathProg model as the input.

For example, below is pieces of the model, 
set I; /* I={a, b, c}*/
var x{I};
.......

In my own application, I want to check the x value for every member of set 
I, x[a], x[b]...

I read the documents, but seems can't find the direct APIs for this, anyone 
knows or can give me some advice will be appreciated pretty much.

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