Añadido código de las reglas, solucionado errores.

1 files changed, 11 insertions, 2 deletions

diff --git a/include/expressions.hpp b/include/expressions.hpp
index 3191436..a293408 100644
--- a/include/expressions.hpp
+++ b/include/expressions.hpp
@@ -23,14 +23,14 @@ enum trig_functions {
   i_ctg
 };
 
-class Differentiator; // Forward declaration.
+class Differentiator; // Forward declaration
 
 class Expression {
 public:
   Expression(Expression *left, Expression *right, token_type type);
   virtual ~Expression() = default;
   std::string getRepr();
-  Expression *diff(const Differentiator *d);
+  virtual Expression *diff(const Differentiator *d) = 0;
   Expression *getLeft();
   Expression *getRight();
   virtual float eval(int arg) = 0;
@@ -52,6 +52,7 @@ public:
   ~Literal();
   int getValue();
   float eval(int arg) override;
+  Expression *diff(const Differentiator *d) override;
   Expression *copy() override;
 protected:
   void setRepr() override;
@@ -66,6 +67,7 @@ public:
   ~Function();
   Expression *getArg();
   float eval(int arg) override;
+  Expression *diff(const Differentiator *d) override;
   trig_functions getFunctionName() const;
   Expression *copy() override;
 protected:
@@ -80,6 +82,7 @@ public:
   explicit Variable(char name);
   ~Variable();
   float eval(int arg) override;
+  Expression *diff(const Differentiator *d) override;
   Expression *copy() override;
 protected:
   void setRepr() override;
@@ -90,6 +93,7 @@ public:
   AddExpression(Expression *left, Expression *right);
   ~AddExpression();
   float eval(int arg) override;
+  Expression *diff(const Differentiator *d) override;
   Expression *copy() override;
 };
 
@@ -99,6 +103,7 @@ public:
   ~SubExpression();
   float eval(int arg) override;
   Expression *copy() override;
+  Expression *diff(const Differentiator *d) override;
 };
 
 class NegationExpression : public Expression {
@@ -107,6 +112,7 @@ public:
   ~NegationExpression();
   float eval(int arg) override;
   Expression *copy() override;
+  Expression *diff(const Differentiator *d) override;
 protected:
   void setRepr() override;
 };
@@ -117,6 +123,7 @@ public:
   ~DivisionExpression();
   float eval(int arg) override;
   Expression *copy() override;
+  Expression *diff(const Differentiator *d) override;
 };
 
 class MultiplicationExpression : public Expression {
@@ -125,6 +132,7 @@ public:
   ~MultiplicationExpression();
   float eval(int arg) override;
   Expression *copy() override;
+  Expression *diff(const Differentiator *d) override;
 };
 
 class PowerExpression : public Expression {
@@ -133,6 +141,7 @@ public:
   ~PowerExpression();
   float eval(int arg) override;
   Expression *copy() override;
+  Expression *diff(const Differentiator *d) override;
 };
 
 #endif /* EXPRESSIONS_H */