Visual C++ round / rint ????

Hi,

how can I round double in Visual C++ ?

In Dev-Cpp works:

#include <math.h>
int myInt;
myInt = int (round(45.65445));

, but in Visual C++:

#include <cmath>
int myInt;
myInt = int (round(45.65445));

gives -> error C2065: 'round' : undeclared identifier

round was introduced by C99, which MSVC doesn't implement. However, you can achieve the same result (for positive numbers):

Code:

---

myInt = int (45.65445 + 0.5);

---

For something that will work with negatives, try this post.

AFAIK, round() is not a standard function. floor() and ceil(), which are in the standard C library and declared in <math.h>, can probably be used in combination to achieve what you want. In C++, and alternative would be based on std::floor() and std::ceil() in <cmath>.

okidoki