c++ regex用法实例

目的是将arp -a 命令扫描出来的局域网中的地址分离出ip 和 mac等信息

#include 
#include 
#include 
#include 
std::string test1 = "接口: 192.168.1.144 --- 0x5";
std::string test2 = "  192.168.1.1           cc-81-da-02-ed-f1     动态";


const char * test = "接口: 192.168.1.144 --- 0x5"
"	Internet 地址         物理地址              类型"
"	192.168.1.1           cc-81-da-02-ed-f1     动态"
"	192.168.1.255         ff-ff-ff-ff-ff-ff     静态"
"	224.0.0.22            01-00-5e-00-00-16     静态"
"	224.0.0.251           01-00-5e-00-00-fb     静态"
"	224.0.0.252           01-00-5e-00-00-fc     静态"
"	239.255.255.250       01-00-5e-7f-ff-fa     静态"
"	255.255.255.255       ff-ff-ff-ff-ff-ff     静态";
int main() {
	//std::stringstream s = test2;
	std::string target = "@abc def--";
	std::regex e("(\S+)\s+(\S+)\s+(\S+)");
	std::smatch sm;
	std::regex_search(test2, sm, e);

	for (int i = 0; i < sm.size(); ++i) {
		std::cout << "sm[" << i << "]: " << sm[i] << std::endl;
	}
	std::cout << "sm.prefix: " << sm.suffix() << std::endl;

	return 0;
}