c++組み込みタイプデフォルトテスト

#include 

int main ()
{
    int i = int();
    //unsigned int ui = unsigned int(); 
    
    double d = double();
    float f = float();
    
    char c = char();
    //unsigned char uc = unsigned char();
    
    std::cout << "
i = "  << i
              //<< "
ui = " << ui
              << "
d = "  << d
              << "
f = "  << f
              << "
c = "  << c
              //<< "
uc = " << uc
              << std::endl;
              
    return 0;
}

i = 0
d = 0
f = 0
c = 
 

#include 
//vs2017

int main ()
{
    int i = int();
    unsigned int ui = unsigned int();
    
    double d = double();
    float f = float();
    
    char c = char();
    unsigned char uc = unsigned char();
    
    std::cout << "
i = "  << i
              //<< "
ui = " << ui
              << "
d = "  << d
              << "
f = "  << f
              << "
c = "  << c
              //<< "
uc = " << uc
              << std::endl;
              
    return 0;
}

i = 0
ui = 0
d = 0
f = 0
c = a
uc = a