已知前序遍历和中序遍历的结果求后序遍历

菜鸡学习记录，贴代码：

#include <stdio.h>
#include <stdlib.h>
/** dandelion
*
*   2017-08-09
*  已知前序遍历和中序遍历的结果求后序遍历
*
*/
void changeOrderToLRD(char *pre,char *mid,int length)
{
    if(0 == length)
        return;
    char data= *pre;
    int index = 0;
    for(; index<length; rootIndex++)
    {
        if(mid[index]==*pre)
            break;
    }
    changeOrderToLRD(pre+1,mid,index);
    changeOrderToLRD(pre+index+1,mid+index+1,length-(index+1));
    printf("%c",data);
}

int main()
{
    char *pre="adgxbejmc";
    char *mid = "gdbxajmec";
    changeOrderToLRD(pre,mid,9);
    printf("\n");
    return 0;
}