Detecting if a file is open

Question

How can I detect if a file is open in C++? I am trying to use a code like this:

    int main()
    {
        ifstream file("file.txt");
        if ( /*here comes the check if file is open*/ ) cout<<"File open successfully"; else cout<<"File couldn't be opened. Check if the file is not used by another program or if it exists";
    }

Answer 1

You are looking for the function is_open()

if(file.is_open()){}

Answer 2

if(file.is_open())

You are calling ifstream::is_open() function