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  1. #include <iostream>
  2. #include <cmath> 
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7. 	int member1, sum2 = 0;
  8. 	double member2, res = 0, sum1 = 0;
  9. 	while (cin >> member1 >> member2)
  10. 	{
  11. 		if (member1=='e') break;
  12. 		sum1 += member1 * member2;
  13. 		sum2 += member1;
  14. 	}
  15. 	res = sum1 / sum2;
  16. 	cout<< res << endl;
  17. 	return 0;
  18. }
Success #stdin #stdout 0s 3460KB
comments (?)
stdin
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	3 -0.5 2 -0.4 1 -0.3 5 32 11 5 20 -1
stdout
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4.58095
https://ideone.com/slyH2W
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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