c++ - 为什么这些成员没有被默认初始化？

Question

在下面的代码中，我收到了这些警告消息:

Member 'year' was not initialized in this constructor

Member 'month'was not initialized in this constructor

Member 'day' was not initialized in this constructor

...

但是，对于 uint32_t 类型，我希望成员默认初始化为 0。

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") { };

为什么这些成员没有被默认初始化，我该怎么办？

Answer 1

您可以使用初始化列表来初始化它们:

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