给定ip地址与子网掩码,通过与运算判断是否属于同一子网:
#include<iostream> #include<string> #include<vector> namespace Address{ class Ip_Mask_Address { public: explicit Ip_Mask_Address(const std::string& ipaddress ,const std::string& ipmask) :ip_adress(ipaddress),ip_mask(ipmask) {} private: void GetBinaryAdress(std::vector<int>& vec,const std::string& adress); public: const std::string GetNetAddress(); const std::string GetIpAddress() const{return ip_adress;} const std::string GetIpMask() const{return ip_mask;} private: std::string ip_adress; std::string ip_mask; }; void Ip_Mask_Address::GetBinaryAdress(std::vector<int>& vec,const std::string& adress){ std::string temp = ""; for(auto& str:adress){ if(str != '.'){ temp += str; }else{ vec.push_back(std::stoi(temp)); temp = ""; } } vec.push_back(std::stoi(temp)); } const std::string Ip_Mask_Address::GetNetAddress(){ std::vector<int>vec_ip,vec_mask; GetBinaryAdress(vec_ip,ip_adress),GetBinaryAdress(vec_mask,ip_mask); std::string net_address = ""; for(unsigned int i = 0;i < 4;++i){ net_address += (std::to_string(vec_ip.at(i) & vec_mask.at(i))); if(i != 3) net_address += '.'; } return net_address; } bool IfBelongSameNetWork(Ip_Mask_Address& lhs,Ip_Mask_Address& rhs) { if(lhs.GetNetAddress() == rhs.GetNetAddress() && lhs.GetIpAddress() != rhs.GetIpAddress()){ return true; }else return false; } } void test(){ using namespace Address; Ip_Mask_Address address_1("192.168.182.131","255.255.255.0"); Ip_Mask_Address address_2("192.168.26.131","255.255.255.0"); if(IfBelongSameNetWork(address_1,address_2)) std::cout<<"They are in the same network\n"; else std::cout<<"Not in the same network\n"; } int main(){ test(); return 0; }