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  1. #include <iostream>
  2. #include <iomanip>
  3. using namespace std;
  4.  
  5. int main() {
  6. double pi = 3.141592653589793238;
  7.  
  8. std::cout << std::setprecision(19) << pi << std::endl;
  9.  
  10. return 0;
  11. }
Success #stdin #stdout 0s 3460KB
stdin
Standard input is empty
stdout
3.141592653589793116