How to count lines of a file in C++?

Question

How can I count lines using the standard classes, fstream and ifstream?

Answer 1

int aNumOfLines = 0;
ifstream aInputFile(iFileName); 

string aLineStr;
while (getline(aInputFile, aLineStr))
{
    if (!aLineStr.empty())
        aNumOfLines++;
}

return aNumOfLines;