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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() 
  5. {  float sum=0;
  6.    int n;
  7.    cout<<"Введіть число"<<endl;
  8.    cin>>n;
  9.    for(int i=1; i<=n;i++)
  10.    {
  11.      sum=sum + static_cast<float>(i)/(static_cast<float>(2*n+1)*(static_cast<float>(2*n+1)));
  12.    }
  13.    cout<< sum;
  14. }
Success #stdin #stdout 0s 5284KB
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stdin
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Standard input is empty
stdout
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Введіть число
0.125
https://ideone.com/QJqwAR
language:
C++ (gcc 8.3)
created:
12 days ago
visibility:
public

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