fix error

Makefile

@@ -11,8 +11,9 @@ CPP = $(MinGW64)/bin/g++
 # CC       = gcc.exe
 # WINDRES  = windres.exe
 # RM	   = rm -f
-OBJ      = src/csar.o test/test_emplace.o test/test_json.o
-LINKOBJ  = 
+OBJ      = src/csar.o
+TESTOBJ  = test/test_emplace.o test/test_json.o
+LINKOBJ  = src/json.o
 LIBS     = -lboost_program_options-mt -L $(MinGW64)/lib
 INCS     = -I $(MinGW64)/include -I include
 CXXINCS  = $(INCS)
@@ -26,13 +27,13 @@ SRC 	 = $(SRCDIR)/$(NAME:.exe=.cpp)
 all: all-before $(BIN) all-after
 
 clean: clean-custom
-	${RM} $(OBJ) $(BIN)
+	${RM} $(OBJ) $(BIN) $(LINKOBJ)
 
-$(BIN): $(SRC)
-	$(CPP) -o $@ $< $(LINKOBJ) $(LIBS)
+$(BIN): $(OBJ) $(LINKOBJ) 
+	$(CPP) -o $@ $^  $(LIBS)
 
-src/csar.o: src/csar.cpp
-	$(CPP) -c src/csar.cpp -o src/csar.o $(CXXFLAGS)
+src/%.o: src/%.cpp
+	$(CPP) -o $@ -c $< $(CXXFLAGS)
 
 test/test_emplace.o: test/test_emplace.cpp
 	$(CPP) -c test/test_emplace.cpp -o test/test_emplace.o $(CXXFLAGS)

include/json.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "json.hpp"
+
+using json = nlohmann::json;
+
+class Task:public json 
+{
+public:
+	void operator() ();
+};
+
+Task&& loadjson(std::string file_path);

src/csar.cpp

@@ -1,20 +1,16 @@
 #include <iostream>
-#include <exception>
 #include <boost/program_options.hpp>
-
-struct NotImplementedError: public std::exception
-{
-};
+#include "json.h"
 
 namespace po = boost::program_options;
 
 int main(int argc, char const *argv[])
 {
-	po::options_description desc("Arguments: ");
+	po::options_description desc("语法: csar <input-file> [options]");
 	desc.add_options()
-		("help", "produce help messages")
+		("help,h", "produce help messages")
 		("input-file", po::value< std::string >(), "input file path")
-		("output", po::value< std::string >(), "output file path")
+		("output-file", po::value< std::string >(), "output file path")
 		;
 	po::positional_options_description p;
 	p.add("input-file", -1);
@@ -25,13 +21,19 @@ int main(int argc, char const *argv[])
 	po::notify(vm);
 
 	if (vm.count("help")) {
-		std::cout << "Usage: options_description [options]\n";
 		std::cout << desc << std::endl;
-		return 0;
 	}
-	if (vm.count("output"))
+
+	if (vm.count("input-file"))
 	{
-	 	// std::cout << desc["output"].as<std::string>() << std::endl;
+		auto infile = vm["input-file"].as<std::string>();
+	 	std::cout << "Read from file: " << infile << std::endl;
+	 	auto task = loadjson(infile);
+	 	task();
 	} 
+	else
+	{
+		std::cout << desc << std::endl;
+	}
 	return 0;
 }

src/json.cpp

@@ -0,0 +1,22 @@
+#include "json.h"
+#include <fstream>
+#include <exception>
+#include <iostream>
+
+struct NotImplementedError: public std::exception
+{
+};
+
+void Task::operator() ()
+{
+	std::cout << "Running Task" << std::endl;
+	throw NotImplementedError();
+}
+
+Task&& loadjson(std::string file_path)
+{
+	std::ifstream file(file_path);
+	Task s;
+	file >> *static_cast<json*>(&s);
+	return std::move(s);
+}