C++生成-1到1之间的随机小数

#include 
#include 
#include 

int main( int argc, char * argv[]) { //Type of random number distribution
std:: uniform_real_distribution< double> dist(- 1.0, 1.0); //(min, max)
//Mersenne Twister: Good quality random number generator
std:: mt19937 rng;
//Initialize with non-deterministic seeds
rng.seed( std:: random_device{} ());
cout << "wb:";
for( int i= 0;i< 5;i++){
wb[i]=dist (rng );
cout << wb[i] << " ";
}
cout <<endl;
return 0;
}
运行结果：