C/C++: 生成不重复的一组随机数

//随机一组数据
std::vector<int> randVector(int num) {
std::vector<int> result;
result.clear();
result.reserve(num);
srand((int)time(0));
for (size_t i = 0; i < num; i++)
{
result.push_back(i);
}
int p1;
int p2;
int temp;
int count = num;

while (--num)
{
p1 = num;
p2 = rand() % num;
temp = result[p1];
result[p1] = result[p2];
result[p2] = temp;
}
return result;
}

std::vector rv = randVector(10);

num = 2
num = 8
num = 6
num = 5
num = 7
num = 4
num = 3
num = 1
num = 9
num = 0