Controlling precision of floating-point values : float output « Data Type « C++






  1. C++
  2. Data Type
  3. float output

Controlling precision of floating-point values

   
#include <iostream>
#include <iomanip>

using std::cout;
using std::cin;
using std::endl;
using std::ios;
using std::setiosflags;
using std::setprecision;

#include <cmath>

int main()
{
   double root2 = sqrt( 2.0 );
   int places;

   cout << setiosflags( ios::fixed) << endl;

   for ( places = 0; places <= 9; places++ ) {
      cout.precision( places );
      cout << root2 << '\n';
   }

   for ( places = 0; places <= 9; places++ )
      cout << setprecision( places ) << root2 << '\n';

   return 0;
}








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