objective-c - 如何四舍五入浮点值？

Question

Possible Duplicate:
Rounding numbers in Objective-C

在 Objective-c 中如何对浮点值进行四舍五入？

Answer 1

除了其他答案:

float theFloat = 1.23456;
int rounded = roundf(theFloat); NSLog(@"%d",rounded);
int roundedUp = ceil(theFloat); NSLog(@"%d",roundedUp);
int roundedDown = floor(theFloat); NSLog(@"%d",roundedDown);
// Note: int can be replaced by float

对于特定小数的四舍五入，请参阅 Alex Kazaev 提到的问题。