iOS objective-C : using modulo on a float to get "inches" from Feet

Question

我正在尝试制作一个简单的 Objective-C 高度转换器。输入是英尺的 (float) 变量，我想转换为 (int) 英尺和 (float) 英寸:

float totalHeight = 5.122222;
float myFeet = (int) totalHeight; //returns 5 feet
float myInches = (totalHeight % 12)*12; //should return 0.1222ft, which becomes 1.46in

但是，我不断收到来自 xcode 的错误，并且我意识到模运算符仅适用于 (int) 和 (long)。有人可以推荐一种替代方法吗？谢谢!

Answer 1

即使模数也适用于 float ，使用:

fmod()

你也可以用这种方式...

float totalHeight = 5.122222;
float myFeet = (int) totalHeight; //returns 5 feet
float myInches = fmodf(totalHeight, myFeet);
NSLog(@"%f",myInches);