Like float round when converting it to integer

Question

If i have

(float)value = 10.50

and do

int new_value = (int)value

What rules will round a number?

Answer 1

When the final value of the floating type is converted to an integer type, the fractional part is discarded (i.e. the value is truncated to zero ).

So, in case -10.5it is converted to -10.

C ++ 11 4.9 Conversions with a floating integral [conv.fpint]

r rvalue . ; .. . undefined, . [. - bool, . 4.12. -end note]

Answer 2

: , - 10. . : -10.5 -10.

Answer 3

float , , float 10.5 10, float -10.5 -10.