Small code to Master learning Motoki

 /*****************  run   Environment:http://www.anycodes.cn/zh/  content:  cardinality tree   ************* /  #include  <stdio.h> #include  <stdlib.h>typedef struct radixnode  {    char *str;     struct radixnode *lchild ,  *rchild; } radixnode;void radix_insert (RADIXNODE&NBSP;*NODE,&NBSP;CHAR&NBSP;*STR) {      int i;     for  (i = 0; str[i] ! =  ' + ';  i++)  {                          if  (str[i] ==  ' 0 ')  {               if  ( Node->lchild == null)                      node->lchild = (radixnode*)  calloc (sizeof (Radixnode),  1);                node = node->lchild;                           }            else {               if  ( Node->rchild == null)                      node->rchild =  (radixnode*) calloc (sizeof ( Radixnode),  1);                node =  node->rchild;          }                     }      node->str = str;} Void radix_preorder_walk (Radixnode *node) {     if  (node !=  NULL)  {          if  (node->str !=  NULL)                printf ("%s\n", &NBSP;NODE-&GT;STR);           radix_preorder_walk (node-> Lchild);           radix_preorder_walk (Node->rchild);      }}int main (void) {     radixnode *root =   (radixnode*) malloc (sizeof (Radixnode)),      char ss[5][5]={"01", "011", "101" , "1010", "1011"};     radix_insert (Root, ss[0]);      radix_insert (Root, ss[1]);       radix_insert (root, ss[2]);       radix_insert (Root, ss[3]);       radix_ Insert (root, ss[4]);       radix_preorder_walk (Root);      return 1;}

Original http://blog.csdn.net/dc_726/article/details/7391988

Modification eliminates errors caused by warnings and certain compilers

Small code to Master learning Motoki