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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. class HH{
  4. 	float d,r,h;
  5. 	public:
  6. 		HH(){
  7. 			d=r=h;
  8. 		}
  9. 		HH(float a,float b,float c){
  10. 			d=a;
  11. 			r=b;
  12. 			h=c;
  13. 		}
  14. 		float Thetich(){
  15. 			return d*r*h;
  16. 		}
  17. 	    friend istream&operator>>(istream &x,HH& y);
  18. 		friend ostream&operator<<(ostream &x,HH y);
  19. 		HH operator+(HH y);
  20. };
  21. istream&operator>>(istream &x,HH& y){
  22. 	cout<<"Chieu dai: "; x>>y.d;
  23. 	cout<<"Chieu rong: "; x>>y.r;
  24. 	cout<<"Chieu cao: "; x>>y.h;
  25. //	x<<"The tich: "<<y.Thetich()<<endl;
  26. 	return x;
  27. }
  28. ostream&operator<<(ostream &x,HH y){
  29. 	x<<"Chieu dai: "<<y.d<<endl;
  30. 	x<<"Chieu rong: "<<y.r<<endl;
  31. 	x<<"Chieu cao: "<<y.h<<endl;
  32. 	x<<"The tich: "<<y.Thetich()<<endl;
  33. 	return x;
  34. }
  35. HH HH::operator+(HH y){
  36. 	HH m;
  37. 	m.d=d+y.d;
  38. 	m.r=r+y.r;
  39. 	m.h=h+y.h;
  40. 	return m;
  41. }
  42. int main(){
  43. 	HH h1(2,3,5); 
  44. 	HH h2;
  45. 	cout<<"Thong tin hh1: "<<endl;
  46. 	cout<<h1<<endl;
  47. 	cout<<"Nhap thong tin hh2: "<<endl;
  48. 	cin>>h2;
  49. 	ofstream f("hhkthp.txt");
  50. 	f<<"thong tin hh1: "<<h1<<endl;
  51. 	f<<"thong tin hh2:"<<h2<<endl;
  52. 	cout<<"Tong 2 HH la: "<<h1+h2<<endl;
  53. 	f<<"Tong 2 HH la: "<<h1+h2<<endl;
  54. 	return 0;
  55. }
  56.  
Success #stdin #stdout 0s 5280KB
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stdin
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Standard input is empty
stdout
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Thong tin hh1: 
Chieu dai: 2
Chieu rong: 3
Chieu cao: 5
The tich: 30

Nhap thong tin hh2: 
Chieu dai: Chieu rong: Chieu cao: Tong 2 HH la: Chieu dai: 2
Chieu rong: 3
Chieu cao: 5
The tich: 30
https://ideone.com/P3lURk
language:
C++ (gcc 8.3)
created:
10 hours ago
visibility:
public

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