/*   * this file is the implementation of hanoi game   * file name: hanoi.c   * author: John Woods   * date: 2015/05/30   * statement: anyone can use this file for any purpose   */  #include <stdio.h>  #include <stdlib.h>     //function declarations  void hanoi(int n, char x, char y, char z);  void move(int n, char x, char y);     //program entrance  int main(void) {      char c;      int n = 0; //the height of hanoi      printf("please input the height of hanoi:");      while(!scanf("%d", &n)) {          while((c=getchar())!='\n' || c!=EOF);          printf("bad input! try again:");      }      hanoi(n, 'x', 'y', 'z');      return 0;  }        //function implementations  void hanoi(int n, char x, char y, char z) {      if(1 == n) {          move(1, x, z);      } else {          hanoi(n-1, x, z, y);          move(n, x, z);          hanoi(n-1, y, x, z);      }  }     void move(int n, char x, char z) {      printf("move disk %d from %c to %c\n", n, x ,z);  }