分支定界法基本框架

inc/common.hpp

@@ -87,17 +87,28 @@ namespace sv {
 		EQUAL
 	};
 
+
+	enum class VarType {
+		CONTINUOUS,
+		BINARY,
+		INTEGER,
+	};
+
 	class Var {
 	public:
-		Var(double coef = 1) :col(0), val(0), coeffs(coef) {};
+		friend class Model;
+		friend class LinSolver;
+		friend class Expr;
+
+		Var(double coef = 1, VarType type_ = VarType::CONTINUOUS);
 		double get(DoubleAttr attr);
 		int get(IntAttr attr);
-		friend class Model;
-		friend class Expr;
+
 	private:
 		double coeffs;
 		double val;
 		int col;
+		VarType type;
 	};
 
 	Expr operator+(const Expr& x, const Expr& y);
@@ -131,7 +142,7 @@ namespace sv {
 		Expr(double constant = 0.0);
 		Expr(Var var, double coeff = 1.0);
 
-		friend class Model;
+		friend class LinSolver;
 
 		friend Expr operator+(const Expr& x, const Expr& y);
 		friend Expr operator+(const Expr& x);