C++ 随机数

#include <iostream>
#include <stdlib.h>
#include <time.h>

#define random(a,b) (rand() % (b-a) + a)

using namespace std;

int main()
{
    srand((unsigned)time(NULL));
    for(int i=; i<; i++)
        cout << random(,) << "\t" << rand()/double(RAND_MAX) << endl;
}