Replication function Order for C + + derived classes, and child parent class compatibility

#include <iostream>using namespacestd;classCfathersum//Parent class Sum{ Public: Cfathersum () {cout<<"1,default Constructing Cfathersum"<<endl;}//Default ConstructsCfathersum (intIREC) {cout<<"1,constructing cfathersum"<<irec<<endl;}//Constructor member initialization};classCfatherbru//Parent Class Bru{ Public: Cfatherbru () {cout<<"2,default Constructing Cfatherbru"<<endl;}//Default ConstructsCfatherbru (intIREC) {cout<<"2,constructing Cfatherbru"<<irec<<endl;}//Constructor member initialization};classCfatherobam//Parent Class Obam{ Public:    //The first line is used to compare the default constructs//cfatherobam (int irec) {cout<< "3,constructing Cfatherobam" <<IREC<<ENDL;}//Constructor member initializationCfatherobam () {cout<<"3,default Constructing cfatherobam*"<<endl;}//Default Constructs};classCSon: PublicCfathersum, PublicCfatherbru, PublicCfatherobam//Inherit parent Sum,bru,obam{ Public: CSon (intIfirst,intISec,intIthir,intIFOR): Cfathersum (Ifirst), M_bru (IFOR), M_sum (Ithir), Cfatherbru (ISEC) {//Cfatherobam (IFOR), M_obam (IFOR) non-default construct, must derive construct pass construction parameter} CSon (ConstCSon &co): Cfatherbru (CO), Cfathersum (CO), Cfatherobam (CO) {}//pass-through, child-parent class compatibility Public: Cfatherobam m_obamcopy;Private: Cfathersum m_sum;    Cfatherbru M_bru; Cfatherobam M_obam;};//Main functionintMain () {CSon son (1,2,3,4); CSon Otherson=Son;    GetChar (); return 0;}

The results are as follows:

Replication order: Copy values are compatible with the child parent class by the copy constructor of the data member of the derived class.

Thinking:

CSon (const CSon &co): Cfatherbru (CO), Cfathersum (CO), Cfatherobam (CO) {}// parameter, child parent class compatible

Pass valid values to the non-default constructor of the parent class when copying

Replication function Order for C + + derived classes, and child parent class compatibility