#include
#include
using namespace std;
class person
{
protected:
char name[80];
int age;
public:
void getData(){
cout << "\n Enter name: "; cin >> name;
cout << " Enter age: "; cin >> age;
}
void showData(void){
cout << "\n Name: " << name;
cout << "\n Age: " << age;
}
};
int main(){
person pers;
ifstream infile;
infile.open("GROUP.DAT", ios::in | ios::binary);
infile.seekg(0, ios::end);
int endposition = infile.tellg();
int n = endposition / sizeof(person);
cout << "\nThere are " << n << " persons in file";
cout << "\nEnter person number: ";
cin >> n;
int position = (n-1) * sizeof(person);
infile.seekg(position);
infile.read( reinterpret_cast(&pers), sizeof(pers) );
pers.showData();
cout << endl;
return 0;
}