C++ Primer Plus 7.3

#include <iostream>#include <string> //#include <cstring> struct box{char maker[40];float height;float width;float length;float volume;};void Set_struct(box *);void Disp_struct(box);void main(){using namespace std;box ch;cout<<"Please enter parameters of box: /n"<<"maker: ";cin.getline(ch.maker,40);cout<<"height: ";cin>>ch.height;while(cin.fail()){cout<<"Enter error, please enter correct number: ";cin.clear();while(cin.get()!='/n'); cin>>ch.height;}cout<<"width: ";cin>>ch.width;while(cin.fail()){cout<<"Enter error, please enter correct number: ";cin.clear();while(cin.get()!='/n'); cin>>ch.width;}cout<<"length: ";cin>>ch.length;while(cin.fail()){cout<<"Enter error, please enter correct number: ";cin.clear();while(cin.get()!='/n'); cin>>ch.length;}Set_struct(&ch);Disp_struct(ch);}void Set_struct(box *ch){ch->volume=ch->height*ch->width*ch->length;}void Disp_struct(box ch){using namespace std;cout<<"/nmake: "<<ch.maker<<endl;cout<<"height: "<<ch.height<<endl;cout<<"width: "<<ch.width<<endl;cout<<"length: "<<ch.length<<endl;cout<<"volume: "<<ch.volume<<endl;}