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  1. #include <iomanip>
  2. #include <iostream>
  3. #include <math.h>
  4. #include <tgmath.h> 
  5. using namespace std;
  6. double round_with_precision(double d, const int &prec)
  7. {
  8. 	d *= pow(10, prec);
  9.     return std::round(d) / pow(10, prec);
  10. }
  11. int main(){
  12.     const int prec = 2;
  13.     cout << round_with_precision(1.7/20, prec) << endl;
  14.     cout << round_with_precision(1.1/20, prec) << endl;
  15. }
Success #stdin #stdout 0s 3468KB
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https://ideone.com/00Etwc
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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