I am trying to round a double to 3 decimalplaces like this example.
The output will be 12.345 but when I am compiling the program it says:
´floor´: identifier not found.
Perheps I have to #include a class for this and if, which one can be used for this ?
Code:double d = 12.3446; d = floor(d * 1000.0 + 0.5 ) / 1000.0;
I'm sure you have to use #include <iomanip>. In the cout statement when displaying the output, you should have something like this (I'm using dev- C++):
cout << fixed << showpoint << setprecision(3) << d;
Last edited by getName(C-Dub); 01-20-2008 at 06:03 PM.
Or if you want the value itself to be changed, you can include <cmath>.
The <cmath> did work for me... thanks a lot...
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coding
