C++基于Boost库实现命令行解析 C++基于Boost库实现命令行解析

第一次尝试

#include #include // 定义命名空间namespace opt = boost::program_options; int main(int argc, char const *argv[]){ opt::options_description desc("Usage: 32位端口快速扫描器\n\n options: \n"); desc.add_options()("Address,a", opt::value()->default_value("127.0.0.1"), "输入一个IP地址"),("StartPort,s", opt::value()->default_value(1024), "传入扫描起始端口"),("EndPort,e", opt::value()->default_value(65535), "传入扫描结束端口"),("Help,h", "弹出帮助菜单"); // 解析参数将值传递给virtual_map opt::variables_map virtual_map; try {opt::store(opt::parse_command_line(argc, argv, desc), virtual_map); } catch (...) {std::cout << "error \n"; return 0; } // 参数解析完毕，处理 if (virtual_map.count("Help")) {printf("帮助"); } if (virtual_map.count("Address")) {std::cout << "找到" << virtual_map["Address"].as() << std::endl; } if (virtual_map.empty()) {std::cout << "no options\n"; } return 0; }

第二次尝试

#include #include #include #include namespace opt = boost::program_options; int main(int argc, char const *argv[]){ int start_port = 1024, end_port = 65535; std::vector address; opt::options_description opt("\nUsage: 32位端口快速扫描器 Ver:1.0 \n\n options: \n"); opt.add_options()("address,a", opt::value >()->multitoken(), "指定地址")("start_port,s", opt::value(&start_port)->default_value(1024), "开始端口")("end_port,e", opt::value(&end_port)->default_value(65535), "结束端口")("help", "帮助菜单"); opt::variables_map vm; try {opt::store(parse_command_line(argc, argv, opt), vm); } catch (...){std::cout << "command error！\n"; return 0; } opt::notify(vm); if (vm.count("help")) {std::cout << opt << std::endl; return 0; } if (vm.count("address") && vm.count("start_port") && vm.count("end_port")) {//遍历选项值for (auto& str : vm["address"].as >())std::cout << str << " "; int x = vm["start_port"].as(); std::cout << x << std::endl; } return 0; }

最终版

#include #include namespace opt = boost::program_options; int main(int argc, char const *argv[]){ opt::options_description des_cmd("\n Usage: 32位端口快速扫描器 Ver:1.0 \n\n Options: \n"); des_cmd.add_options()("address,a", opt::value()->default_value("127.0.0.1"), "指定地址")("start_port,s", opt::value()->default_value(1024), "开始端口")("end_port,e", opt::value()->default_value(65535), "结束端口")("help,h", "帮助菜单"); opt::variables_map virtual_map; try {opt::store(opt::parse_command_line(argc, argv, des_cmd), virtual_map); } catch (...){ return 0; } // 定义消息 opt::notify(virtual_map); // 无参数直接返回 if (virtual_map.empty()) {return 0; } else if (virtual_map.count("help") || virtual_map.count("h")) {std::cout << des_cmd << std::endl; return 0; } else if (virtual_map.count("address") && virtual_map.count("start_port") && virtual_map.count("end_port")) {std::cout << "Addr = " << virtual_map["address"].as() << std::endl; std::cout << "StartPort = " << virtual_map["start_port"].as() << std::endl; std::cout << "EndPort = " << virtual_map["end_port"].as() << std::endl; } else {std::cout << "option error" << std::endl; } return 0; }

命令行下使用help输出帮助菜单，当传入三个参数时，即可解析到第二个判断上，执行相应的函数即可。