C语言 生成不重复随机数

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

int* GetRand(int* buf,int count,int range)
{
    srand(time(NULL))
    for (int i = 0; i < count; i++)
    {
        int randTmp = rand() % range; 
        for (int j = 0; j < i; j++)
        {
            if (buf[j] == randTmp)
            {
                break;//检查重复。
            }
        }

        buf[i] = randTmp;
    }
    return buf;
}


#define CNT 10
#define RANGE 100

int main()
{
    int* buf = (int*)malloc(sizeof(int)* CNT);

    buf = GetRand(buf, CNT, RANGE);

    for (int i = 0; i < CNT; i++)
    {
        printf("%d,", buf[i]);
        printf("\n");
    }
}