Suppose I have a struct like this:
struct Person
{
string fName;
string lName;
int age;
};
And I want to read in a file(ppl.log) like this:
Glenallen Mixon 14
Bobson Dugnutt 41
Tim Sandaele 11
How would I read in the file and store them? This is what I have
int main()
{
Person p1, p2, p3;
ifstream fin;
fin.open("ppl.log");
fin >> p1;
fin >> p2;
fin >> p3;
return 0;
}
Does that read in the entire line? Or do I have to use the getline()?
I recommend overloading operator>>:
struct Person
{
string fName;
string lName;
int age;
friend std::istream& operator>>(std::istream& input, Person& p);
};
std::istream& operator>>(std::istream& input, Person& p)
{
input >> p.fName;
input >> p.lName;
input >> p.age;
input.ignore(10000, '\n'); // Align to next record.
return input;
}
This allows you to do things like this:
std::vector<Person> database;
Person p;
//...
while (fin >> p)
{
database.push_back(p);
}
Your fields are space separated, so you don't need to use getline. The operator>> for strings will read until a whitespace character.
