🚀 go-pugleaf

Hi all,

    For the following, g++ -Wall complains that I attempt to
compare an unsigned and a signed:

        char char_tmp;
        if (char_tmp == 'i') { ...}

But g++ -Wall does not complain when given the following:

        char char_tmp;
        char ichar = 'i';
        if (char_tmp == ichar) { ... }

Why?

    Question No. 2: I read a C++ book intended for Borland C++
that there is a way to make `cout <<' print more digits for
doubles. But the book did not give an example. When I tried
the following, g++ says cout::setprecision is not <something>

    double dtmp;
    cout.setprecision(16);
    cout << dtmp;

So how can I get more than 6 significant digits without using
%16f?


    Question No. 3. The same book says there is a ws manipulator.
Does this strip white spaces from the istream? The following did
not compile under g++:

        char line_input[MAX_LINE_LENGTH];
        cin.ws();
        cin.getline(line_input, MAX_LINE_LENGTH);

So is there is a built-in method to strip all white spaces from line_input?

Many thanks in advance. Email preferred. Mingzuo Shen