魔术

#include "stdio.h"
#include "stdlib.h"
#include "time.h"
void main(int argc, char const *argv[])
{
 int i;
 char c, gu;
 srand((unsigned)time(NULL));
 c=6;
 gu=rand()%6+1;
 for(i=1;i<=100;i++) {
  c=rand()%31+1;
  if (c>=7&&c<=13)
   c=17;
  if(i%9==0)
   printf("%d. %c\t", i,gu);
  else
   printf("%d. %c\t", i,c);
  if(i%5==0)
   printf("\n");
 }
 getchar();
  printf("The icon you guess is:\n");
  for (i=1;i<=10;i++)
   printf("%c ", gu);
 printf("\n");
 getchar();
}