分支定界法基本框架

src/common.cpp

@@ -1,6 +1,16 @@
 #include "common.hpp"
+#include <iostream>
 using namespace sv;
 
+
+Var::Var(double coef, VarType type_) :
+	col(0), 
+	val(0), 
+	coeffs(coef), 
+	type(type_) 
+{
+};
+
 double Var::get(DoubleAttr attr)
 {
 	switch (attr) {