rj_3.c

建立一棵二叉树

#include<stdio.h>
#include"rj_imp.h"
/*  主函数 */
main()
 {  int k;
     do { 
     	   printf("\n\n\n");
         printf("\n\n   1,creat a tree   ");
         printf("\n\n   2,xianxu bianli ");
         printf("\n\n   3,end  ");
         printf("\n======================================");
         printf("\n     choose (1,2,3)");  
         scanf("%d",&k);
        switch(k)
	       { 
	     	  case 1: t=creat_bt1( );
	     	  	      break; /*  调用性质5建立二叉树算法 */
	        case 2: preorder(t);  
	        	      break;
	        case 3: exit(0);
	       } /*  switch  */
	      printf("\n ----------------");
       }while(k>=1 && k<5);
         printf("\n            bye！"); 
         printf("\n      print enter，back。"); 
 } /* main */