類成員變量：

char :?　　　　　　//隨機
int :2685372　　　　//隨機
string :size:0length:0
vector :0
map :0

結構體　　//取決於成員自己的類型

類成員靜態變量： == 全局變量

char :
int :0
string :size:0length:0
vector :0
map :0

struct AAA1
{
    int i;
    char c[12];
};

class AAAA2
{
public:
    static AAA1 aaa1;
    static std::string s;
    static
 
 std::vector<int> v;
    static std::map<int ,int> m;
};

AAA1 AAAA2::aaa1;
std::string AAAA2::s;
std::vector<int> AAAA2::v;
std::map<int ,int> AAAA2::m;
TEST(INIT,INIT)
{
    AAAA2 aaaa2[10];


    for (int i = 0; i < 10; ++i) {
        std::cout << "char :
 
" << AAAA2::aaa1.c[0] << std::endl;
        std::cout << "int :" << AAAA2::aaa1.i << std::endl;
        std::cout << "string :" << AAAA2::s << "size:"<< AAAA2::s.size() << "length:"<< AAAA2::s.length() << std::endl;
        std::cout 
 
<< "vector :" << AAAA2::v.size() << std::endl;
        std::cout << "map :" << AAAA2::m.size() << std::endl;
    }


}

C++默認值。