Please see Freefem default precision
real a=10.0012;
real b=0.0000123456;
cout << a+b << endl;
cout.precision(16);
cout << a+b << endl;
Please see Freefem default precision
real a=10.0012;
real b=0.0000123456;
cout << a+b << endl;
cout.precision(16);
cout << a+b << endl;