为什么这些成员没有被默认初始化？

Question

In the following code, I get these warning messages:

Member 'year' was not initialized in this constructor

Member 'month'was not initialized in this constructor

Member 'day' was not initialized in this constructor

...

However, I would expect the members to be default initialized to, say, 0 for the uint32_t types.

typedef uint32_t bmd2_uint32;

class UnitTestCInterface : public UnitTest {
{
  private:
    bmd2_uint32 year;
    bmd2_uint32 month;
    bmd2_uint32 day;
    ...

  public:
    UnitTestCInterface() 
      : filename(nullptr), UnitTest("UNIT TEST: C Interface") { };

How come these members aren't being default initialized, and what can I do about it?

Answer 1

You can initialize them using an initialization list:

UnitTestCInterface() 
      : year(0),month(0),day(0), filename(nullptr), UnitTest("UNIT TEST: C Interface")
     { };