Normal (default) mode; only show 5 digits, including both sides of decimal point : cout float « Development « C++ Tutorial

1. C++ Tutorial
2. Development
3. cout float

#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

int main( ) {

   ios_base::fmtflags flags = cout.flags( );

   double pi = 3.14285714;

   cout << "pi = " << setprecision(5) << pi << '\n';

   cout.flags(flags);
}

pi = 3.1429