#include <iostream>
using std::cout;
using std::endl;
int main()
{
double f1 = 3.14;
double f2 = 782.0;
double f3 = 123456.0;
cout.setf(std::ios::fixed, std::ios::floatfield);
cout << "f1: " << f1 << " f2: " << f2 << " f3: " << f3 << endl;
return 0;
}
/*
run:
f1: 3.140000 f2: 782.000000 f3: 123456.000000
*/