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  1. #include<iostream>
  2. #include<iomanip>
  3.  
  4. using namespace std;
  5. int main()
  6. {
  7. 	const double PI = 3.1415;
  8. 	double r;
  9. 	cout<< "Nhap vao ban kinh hinh tron:"; 
  10. 	cin >> r;
  11. 	double chuVi, dienTich;
  12. 	chuVi = 2 * PI * r;
  13. 	dienTich = PI * r * r;
  14. 	cout <<fixed <<setprecision(2);
  15. 	cout <<"Chu vi la:" <<chuVi <<endl << "Dien tich la:" <<dienTich;
  16. 	return 0;
  17. }
Success #stdin #stdout 0s 5320KB
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stdin
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10.5
stdout
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Nhap vao ban kinh hinh tron:Chu vi la:65.97
Dien tich la:346.35
https://ideone.com/t56KAm
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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