Question

Well, basically I was using setprecision(3), but that is rounding up the last number, for example if we do like this –

double x = 5;
x = (double) x / 3;
cout << fixed << setprecision(3) << x << endl;

It will show 1.667

But, if we do it with calculator, it will show – 1.666666666…67

So basically, what I mean is, is there any chance to output in file, just the first 3 digits after the comma, and not to round it up?

Answer 1

cout << fixed << setprecision(3) << double(int(x*1000))/1000 << endl;

we use int() to truncate the tailing digits.