#include #include #include #include using namespace std; class LINHKIEN { public: char name[30]; float value; LINHKIEN(){ name[0] = '\0'; value = 0; } ~LINHKIEN(){ } friend void operator>>(LINHKIEN &lk,istream &is); friend void operator <<(LINHKIEN lk,ostream &os); }; void operator>>(LINHKIEN &lk,istream &is) { cout<<"Name : "; is>>lk.name; cout<<"Value : "; is>>lk.value; } void operator<<(LINHKIEN lk,ostream &os) { os<>cin; a<