Getting input from external files?

Question

I need to get very basic input from an external file in C++. I tried searching the internet a few times but nothing really applied to what I need. This would be a .txt file that

Answer 1

You can open a file for input with std::ifstream from the header , then read from it as you would from std::cin.

int main()
{
    std::ifstream input("somefile.txt");
    int a;
    input >> a;  // reads a number from somefile.txt
}

Obviously, you can use >> in a loop to read multiple numbers.