问题描述
我已经考虑过使用 rand()
但我是正确的,认为最大数量, RAND_MAX
is = 32000(有关于)?
有没有办法解决这个问题,一种方法不会降低选择非常低的数字的概率,也不会增加挑选高/中等数字的概率?
编辑:@Jamey D的方法完全独立于Qt。
新的C ++ 11 std :: uniform_real_distribution
#include< ; random>
std :: random_device rd;
std :: mt19937 gen(rd());
std :: uniform_real_distribution<>分布(1,25000000);
//生成一个随机整数:
double random = distribution(gen);
How would you make a function that generates a random number from 1 to 25 million?
I've thought about using rand()
but am I right in thinking that the maximum number, RAND_MAX
is = 32000 (there about)?
Is there a way around this, a way that doesn't reduce the probability of picking very low numbers and doesn't increase the probability of picking high / medium numbers?
Edit: @Jamey D 's method worked perfectly independent of Qt.
You could (should) use the new C++11 std::uniform_real_distribution
#include <random>
std::random_device rd;
std::mt19937 gen(rd());
std::uniform_real_distribution<> distribution(1, 25000000);
//generating a random integer:
double random = distribution(gen);
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