Mega Code Archive
Controlling precision of floating-point values
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#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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