A function to convert a numerical data type into a string using precision decimals

tostring.cpp

#include <iostream>
#include <string>
#include <sstream>

template <typename T>
std::string to_string_with_precision(const T a_value, const int n = 4)
{
  std::ostringstream out;
  out.precision(n);
  out << std::fixed << a_value;
  return out.str();
}

int main()
{
    std::cout<<to_string_with_precision(3.1452343424) << std::endl;
    std::cout<<to_string_with_precision(3.1090f) << std::endl;
    std::cout<<to_string_with_precision(3) << std::endl;
    return 0;
}