/* 
 *   約瑟夫出圈 
 */ 
#include <stdio.h> 
 
int main() 
{ 
  char peo[100] ; 
  char *p_peo = peo; 
  int i , n , skip , flag[100] = {0} , cnt; 
  int *p_flag = NULL; 
  printf("請輸入人數(shù)："); 
  scanf("%d", &n); 
  printf("所有人如下：\n"); 
  for(p_peo , i = 0 ; p_peo < peo + n ; ++p_peo , ++i) 
  { 
    *p_peo = 'a' + i; 
    printf("%c ", *p_peo); 
  } 
  printf("\n"); 
 
  printf("請輸入報數(shù)值："); 
  scanf("%d", &skip); 
 
  cnt = 0; 
  while(cnt <= n * skip) 
  { 
    for(p_peo = peo , p_flag = flag ; p_peo < peo + n ; ++p_peo , ++p_flag) 
    { 
      if(*p_flag) 
        continue; 
 
      cnt++; 
      if(!(cnt % skip)) 
      { 
        *p_flag = 1; 
        printf("%c ", *p_peo); 
      } 
    } 
  } 
  printf("\n"); 
  return 0; 
}