How randomly selected in several options. . .

Heroes of you may have any ideas?
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Choose a chant with a random number, and each option corresponds to a range of
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Trouble can say elaborate?

cited a floor ultrapro reply:

using random numbers to choose a chant, each option corresponds to a range of

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Do not understand what is meant by a random number landlord can it

 
int index = random ()% count; 

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Random number, then the better. . .
int value = arc4random ()% x; generates a random number of 1 to x-1. . .

Randomly selected ah randomly selected. . .

reference to the third floor stonexing5 reply:

do not understand what is meant by a random number landlord can it

C / C + + code


int index = random ()% count;

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A random number (0 ---- 0.999999). Taken out, multiplied by the number of options you want max_index * random ()
Then erase the decimal point, and replaced with int
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Brother, I'm begging you, do not mention random things, that I know, talking about random issues. . .

references, 5th Floor ocoolo reply:

random number (0 ---- 0.999999). Taken out, multiplied by the number of options you want max_index * random ()
Then erase the decimal point, and replaced with int

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up together, I mean to say how to achieve the realization of multiple buttons disrupted for example, and then to a random sample, if the random number, the problem is that I will lead a few buttons and this one is no longer a sign corresponding relationship between the
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Is this mean?
Button disrupted btn.tag = arc4random ();
Then sorted by size tag, and then index = arc4random ()% count, taking the first few btn
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Ah, man, this idea is actually quite good, but now with btn.tag = arc4random (); disrupted button may be circumstances where the two buttons tag value equal ah

reference to the 8th floor flyeag reply:

is this mean?
Button disrupted btn.tag = arc4random ();
Then sorted by size tag, and then index = arc4random ()% count, taking the first few btn