Example
C++11
struct info_type
{
std::string name;
int age;
float height;
// we define an overload of operator>> as a friend function which
// gives in privileged access to private data members
friend std::istream& operator>>(std::istream& is, info_type& info)
{
// skip whitespace
is >> std::ws;
std::getline(is, info.name);
is >> info.age;
is >> info.height;
return is;
}
};
void func4()
{
auto file = std::ifstream("file4.txt");
std::vector<info_type> v;
for(info_type info; file >> info;) // keep reading until we run out
{
// we only get here if the read succeeded
v.push_back(info);
}
for(auto const& info: v)
{
std::cout << " name: " << info.name << '\n';
std::cout << " age: " << info.age << " years" << '\n';
std::cout << "height: " << info.height << "lbs" << '\n';
std::cout << '\n';
}
}
file4.txt
Wogger Wabbit
2
6.2
Bilbo Baggins
111
81.3
Mary Poppins
29
154.8
Output:
name: Wogger Wabbit
age: 2 years
height: 6.2lbs
name: Bilbo Baggins
age: 111 years
height: 81.3lbs
name: Mary Poppins
age: 29 years
height: 154.8lbs
