Editing Indentation style (section)

=== Stroustrup ===

[[Bjarne Stroustrup]] adapted the K&R style for C++ in his books, such as ''Programming: Principles and Practice using C++'' and ''[[The C++ Programming Language]]''.<ref name="ppp">{{cite web |url=https://www.stroustrup.com/Programming/PPP-style.pdf |title=PPP Style Guide |first=Bjarne |last=Stroustrup |date=September 2010}}</ref>

Unlike the variants above, Stroustrup does not use a "cuddled else". Thus, Stroustrup would write<ref name="ppp" />

<syntaxhighlight lang=c>
    if (x < 0) {
        puts("Negative");
        negative(x);
    }
    else {
        puts("Non-negative");
        nonnegative(x);
    }
</syntaxhighlight>

Stroustrup extends K&R style for classes, writing them as follows:

<syntaxhighlight lang=cpp>
    class Vector {
    public:
        // construct a Vector
        Vector(int s) :elem(new double[s]), sz(s) { }
        // element access: subscripting
        double& operator[](int i) { return elem[i]; }
        int size() { return sz; }
    private:
        // pointer to the elements
        double * elem;
        // number of elements
        int sz;
    };
</syntaxhighlight>

Stroustrup does not indent the labels {{code|public:}} and {{code|private:}}. Also, in this style, while the opening brace of a function starts on a new line, the opening brace of a class is on the same line as the class name.

Stroustrup allows writing short functions all on one line. Stroustrup style is a named indentation style available in the editor [[Emacs]]. Stroustrup encourages a K&R-derived style layout with C++ as stated in his modern ''C++ Core Guidelines''.<ref>{{cite web |last1=Stroustrup |first1=Bjarne |title=C++ Core Guidelines |url=https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#nl17-use-kr-derived-layout |website=GitHub |access-date=3 November 2018}}</ref>