How to read integer value from file in C++

Question

How can read integer value from file? For example, these value present in a file:

5 6 7

If I open the file using fstream then how I can get integer value?

How can read that number and avoid blank space?

Answer 1

ifstream file;
file.open("text.txt");

int i;

while (file >> i) {
   cout << i << endl;
}

Answer 2

ifstream f(filename);

int x, y, z;
f >> x >> y >> z;