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Programming-Idioms

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  • C

Idiom #81 Round floating point number to integer

Declare the integer y and initialize it with the rounded value of the floating point number x .
Ties (when the fractional part of x is exactly .5) must be rounded up (to positive infinity).

#include <math.h>
int y = (int)floorf(x + 0.5f);
Y : constant Integer := Integer (Float'Rounding (X));

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