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+// Unbounded
+
+// Reference :Problem Set 5C,2, The Simplex method and Sensitivity Analysis, Hamdy A. Taha. "Operations Research-An Introduction", 9E(2014))
+
+// Objective function
+c = [-20,-10,-1]';
+
+// Lower Bound of variable
+lb = [0,0,0]
+// Upper Bound of variables
+ub = [%inf,%inf,%inf]
+
+// Constraint Matrix
+A = [3,-3,5;
+1,0,1;
+1,-1,4]
+
+b=[50,10,20]'
+
+intcon = [1 2 3];
+
+// Calling cbcintlinprog
+[x,f,status,output] = cbcintlinprog(c,intcon,A,b,[],[],lb,ub)
+
+// output  =
+// 
+//   relativegap: 0
+//   absolutegap: 0
+//   numnodes: 0
+//   numfeaspoints: 3
+//   numiterations: 1
+//   constrviolation: 0
+//   message: "Continuous Solution Unbounded"
+// status  =
+// 
+//    6.  
+// f  =
+// 
+//    1.79D+308  
+// x  =
+// 
+//    10.  
+//    0.   
+//    0.