#include <stdio.h> #include <math.h> void main() {     int low,high,t=0;     printf("请输入你想寻找素数的范围(例如10~100，输入10 100)\n");     scanf("%d %d",&low,&high);     if(low>high||low<0)         printf("你所输入的数据有误！");     else     {         for(;low<=high;low++)         {             if(low==1||low==0)                 continue;             int j=0;             for(int i=2;i<=sqrt(low);i++)             {                 if(low%i==0)                 {                     j=1;                     break;                 }             }             if(j==0)             {                 if(low<10)                     printf("%d  ",low);                 else                     printf("%d ",low);//一位数与两位数的对齐                 t++;                 if(t%4==0)//没四个为一组，换行操作                     printf("\n");             }         }         if(t==0)             printf("您所输入的范围没有素数\n");         printf("\n");     } }