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The default constructor for class X is one that takes no arguments

//If no user-defined constructors exist for a class, //C++ system generates a default constructor. #include <iostream.h> class Time {                int hh,mm,ss;   public:                //Time(){hh=0;mm=0;ss=0;}                void Set(int h, int m, int s)   {hh = h; mm = m; ss=s;}                void Disp(); }; void Time::Disp() {                cout << "The time is " << hh << ":" << mm << ":" << ss <<endl; } int main() {                Time t1;                t1.Disp();                t1.Set(2,22,22);                t1.Disp();                return 0; } The time is 2009312941:16:0 The time is 2:22:22