小明有五本新书，要借给A，B，C三位小朋友，若每人每次只能借一本，则可以有多少种不同的借法？

#include <stdio.h>                                                            
void main()                                                                  
{                                                                             
  int a,b,c,count=0;                                                         
  printf("there are diffrent menthods for XM to distribute books to 3 readers:\n");
  for(a=1;a<=5;a++)                                                           
   for(b=1;b<=5;b++)                                                         
    for(c=1;a!=b&&c<=5;c++)                                                   
     if(c!=a&&c!=b)                                                            
      printf(count%8?"%2d:%d,%d,%d":"%2d:%d,%d,%d\n",++count,a,b,c);      
}     
最后一句 printf(count%8?"%2d:%d,%d,%d":"%2d:%d,%d,%d\n",++count,a,b,c); 怎么理解啊，比如第一次输出1：1，2，3
可是没见过这样的输出格式，谁帮我分析下，谢谢

看来书这块不能省了，文人不好意思了，看书去