setprecision c++ | How to Use setprecision in c++

If you are new in C++ , and want to output point number up to 2 digits in C++. For example, if number is 3.444, then the output should be 3.44 or if number is 88999.4234 then output should be 88999.42, How can i do that. Here is my code. setprecision c++ | How to Use setprecision in c++

#include <iomanip.h>
#include <iomanip>
int main()
{
    double num1 = 3.12345678;
    cout << fixed << showpoint;
    cout << setprecision(2);
    cout << num1 << endl;
}

std::setprecision

Example for setprecision c++ | How to Use setprecision in c++

// setprecision example
#include <iostream>     // std::cout, std::fixed
#include <iomanip>      // std::setprecision

int main () {
  double f =3.14159;
  std::cout << std::setprecision(5) << f << '\n';
  std::cout << std::setprecision(9) << f << '\n';
  std::cout << std::fixed;
  std::cout << std::setprecision(5) << f << '\n';
  std::cout << std::setprecision(9) << f << '\n';
  return 0;
}

3.1416 3.14159 3.14159 3.141590000

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