diff --git a/Makefile b/Makefile
index fe63122..6b956dd 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@
 CC = g++
 
 # Compiler flags
-CFLAGS = -Wall -Wextra -std=c++11
+CFLAGS = -Wall -Wextra -std=c++17 -Wno-unused-variable -Wno-unused-parameter
 
 # Source directory
 SRC_DIR = ./source
@@ -22,7 +22,7 @@ OBJ_FILES := $(patsubst $(SRC_DIR)/%.cpp,$(BUILD_DIR)/%.o,$(CPP_FILES))
 $(shell mkdir -p $(dir $(OBJ_FILES)))
 
 # Default target
-all: $(BUILD_DIR)/bob
+all: clean $(BUILD_DIR)/bob
 
 # Rule to create necessary directories
 $(DIRS):
@@ -36,6 +36,9 @@ $(BUILD_DIR)/%.o: $(SRC_DIR)/%.cpp
 $(BUILD_DIR)/bob: $(OBJ_FILES)
 	$(CC) $(CFLAGS) $^ -o $@
 
+
+	./$(BUILD_DIR)/bob
+
 # Clean build directory
 clean:
 	rm -rf $(BUILD_DIR)/*
diff --git a/headers/Expression.h b/headers/Expression.h
index 9e00c8c..177f5e5 100644
--- a/headers/Expression.h
+++ b/headers/Expression.h
@@ -22,7 +22,7 @@ struct BinaryExpr : Expr<T>
     const Token oper;
     const std::shared_ptr<Expr<T>> right;
 
-    BinaryExpr(std::shared_ptr<Expr<T>> left, Token oper, std::shared_ptr<Expr<T> > right) : left(left), oper(oper), right(right)
+    BinaryExpr(std::shared_ptr<Expr<T>> left, Token oper, std::shared_ptr<Expr<T>> right) : left(left), oper(oper), right(right)
     {
     }
     T accept(Visitor<T>* visitor) override{
diff --git a/source/main.cpp b/source/main.cpp
index 6af5ec5..b162ac8 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -21,7 +21,7 @@ int main(){
                     Token{MINUS, "-", 1},
                     std::make_shared<LiteralExpr<std::string>>("123", true)
                     ),
-            Token{STAR, "*", 1},
+            Token{MINUS, "-", 1},
             std::make_shared<GroupingExpr<std::string>>(
                     std::make_shared<LiteralExpr<std::string>>("45.67", true)
                     )