CODEWITHSUNDEEP
c++c++11
jensa
jensa

Reputation: 2890

Initialize class member variables in C++ 11

Consider the following class definition:

class C {
public:
    int i = 9;
    const int j = 2;
};

Without using the flag to enable C++11 when compiling (using g++, e.g. g++ -o test test.cpp) the compiler complains on the member variable initializations. However, using -std=c++11 this works fine.

Why has this rule been changed in C++11? Is it considered bad practice initializing member variables in this manner?

Upvotes: 2

Views: 2207

Answers (1)

fredoverflow
fredoverflow

Reputation: 263380

Initializing non-static data members at the point of their declaration wasn't just "bad practice"; it simply wasn't possible at all prior to C++11.

The equivalent C++03 code would be:

class C
{
public:

    C() : i(9), j(2)
    {
    }

    int i;
    const int j;
};

And just in case: What is this weird colon-member syntax in the constructor?

Upvotes: 4

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