随机数没学过，哪位大神能教教随机产生五位无重复数字的随机函数？ 还有原理😂😂

无重复数字

抱歉，没说清楚。是这五位数字各位互不相同

是各位互不重复的五位数字。其实这是个猜数游戏，随机给出一个各位互不相同的五位数，让用户去猜，然后给出偏大偏小提示，纪录猜的次数，最后给出评分。然而，开头的随机数不会

帮忙看看哪里错了，运行有错误

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<string.h>
void main()
{
    int i,t,a[10]={0};
    int m,counts=0;
   
   srand(time(0));
    for(i=0;i<10;i++)a[i]=0;
    for(t=0;t<9876;)
    {
       i=rand()%10;
       if(!a[i])
       {
           t=t*10+i;
       a[i]++;
       }
    }
   
    printf("game beginning\n");
    printf("input five different numbers you guessed\n");
    for(; ;)
    {
        scanf("%d",&m);
        counts++;
        if(m>t)
          printf("Too high!\n");
        else if(m<t)
           printf("Too low!\n");
        else
         {
             printf("right!  your score is %d\n",(100-counts+1));
             printf("you guessed %d times\n",counts);
        
        printf("right value is %d\n",t);
         }
    }
}
                                
                                
        
   

电脑上运行时，五位数中会有重复的数字