mip1_c + + . cpp
/ * 2023年版权,Gurobi优狗万app足彩化,LLC * / / *本例制定和解决以下简单的MIP模型:最大化x + y + 2 z受到x + 2 y + 3 z < = 4 x + y > = 1 x, y, z二进制* / # include“gurobi_c + +。使用名称空间std h”;int主要(int命令行参数个数,char * argv[]){尝试{/ /创建一个环境GRBEnv env = GRBEnv(真正的);env。设置(“记录文件”、“mip1.log”);env.start ();/ /创建一个空模型GRBModel模型= GRBModel (env);/ /创建变量GRBVar x = model.addVar (0.0, 1.0, 0.0, GRB_BINARY " x ");GRBVar y = model.addVar (0.0, 1.0, 0.0, GRB_BINARY " y ");GRBVar z = model.addVar (0.0, 1.0, 0.0, GRB_BINARY“z”);/ /设置目标:最大化x + y + 2 z模型。setObjective (x + y + 2 * z, GRB_MAXIMIZE); // Add constraint: x + 2 y + 3 z <= 4 model.addConstr(x + 2 * y + 3 * z <= 4, "c0"); // Add constraint: x + y >= 1 model.addConstr(x + y >= 1, "c1"); // Optimize model model.optimize(); cout << x.get(GRB_StringAttr_VarName) << " " << x.get(GRB_DoubleAttr_X) << endl; cout << y.get(GRB_StringAttr_VarName) << " " << y.get(GRB_DoubleAttr_X) << endl; cout << z.get(GRB_StringAttr_VarName) << " " << z.get(GRB_DoubleAttr_X) << endl; cout << "Obj: " << model.get(GRB_DoubleAttr_ObjVal) << endl; } catch(GRBException e) { cout << "Error code = " << e.getErrorCode() << endl; cout << e.getMessage() << endl; } catch(...) { cout << "Exception during optimization" << endl; } return 0; }
