Matlab vs C++ Double Precision

Question

I am porting some code from Matlab to C++.

In Matlab

format long
D = 0.689655172413793 (this is 1.0 / 1.45)
E = 2600 / D
// I get E          


        

Answer 1

If I understand what you are trying to achieve, using ceil function might help:

ans = ceil(ans); /* smallest integral value that is not less than ans. */
// now ans in C++ is also be 3970.

Here is usage reference.