c++ - initiating class as a member of struct -
im trying create struct class member inside: .h file: class { public: struct result { int x; ugraph g; <------ class definition }; result m_tempstructresult; a:a(void); void function(); } .cpp file a::a() { } void a::function() { ugraph graph(10); <---- object has receive value ... //manipulations on graph ... m_tempstructresult.g = graph; } the compilation error is: error c2512: 'a::result' : no appropriate default constructor available so problem guess lack of default constructor, added this: struct result { result::result(int graph_size=0) : g(graph_size){ } int x; ugraph g; }; and problem solved. my question if there way initiate class ugraph g inside constructor of class a? , not inside member struct? thanks. yes, use initializer list in constructor of result : result::result() : g(0) // have insert integer here { } another way in c++11 giv
