没有合适的默认构造函数可用

#include " stdafx.h "
#include < iostream >
using namespace std;

class A ... {
public:
staticvoidOutOK()...{
cout<<"Aok"<<endl;
}
} ;

class B ... {
public:
B()...{
cout<<"constructB"<<endl;
}
B(inti)...{
cout<<"constructBwithint"<<endl;
}
staticvoidOutOK()...{
cout<<"Bok"<<endl;
}
} ;

class C ... {
public:
C(inti)...{
cout<<"constructCwithint"<<endl;
}
staticvoidOutOK()...{
cout<<"Cok"<<endl;
}
} ;

int main() ... {
Aa;
a.OutOK();

Bb;
b.OutOK();
Bbint(2);
bint.OutOK();

Cc;//errorC2512:“C”:没有合适的默认构造函数可用
c.OutOK();

return0;
}