如何在Objective-C中创建一个随机的浮点数? [英] How to create a random float in Objective-C?
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问题描述
int randn =(random()%15)+15;
float pscale =(float)randn / 100;
我做错了什么?
解决方案
试试这个:
pre $(float)rand()/ RAND_MAX
或者在0到5之间得到一个:
float randomNum =((float)rand()/ RAND_MAX)* 5;
几种方法可以做同样的事情。
I'm trying to create a random float between 0.15 and 0.3 in Objective-C. The following code always returns 1:
int randn = (random() % 15)+15;
float pscale = (float)randn / 100;
What am I doing wrong?
解决方案
Try this:
(float)rand() / RAND_MAX
Or to get one between 0 and 5:
float randomNum = ((float)rand() / RAND_MAX) * 5;
Several ways to do the same thing.
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