编译过不去！
void myprintf(node *Tree)
{
    printf("\n%s,%d\n",Tree->data.ch,Tree->data.cs);
}  

void preordertraverse(node *Tree, void (*p)(node *))    //先序遍历
{  
    if(Tree)
    {
        (*p)(Tree);
        preordertraverse(Tree->lchild, (*p)(Tree->lchild));
        preordertraverse(Tree->rchild, (*p)(Tree->rchild));
    }
}

void inordertraverse(node *Tree, void (*p)(node *))    //中序遍历
{  
    if(Tree)
    {
        inordertraverse(Tree->lchild, (*p)(Tree->lchild));
        (*p)(Tree);
        inordertraverse(Tree->rchild, (*p)(Tree->rchild));
    }
}

void postordertraverse(node *Tree, void (*p)(node *))    //后序遍历
{  
    if(Tree)
    {
        postordertraverse(Tree->lchild, (*p)(Tree->lchild));
        postordertraverse(Tree->rchild, (*p)(Tree->rchild));
        (*p)(Tree);
    }
}

错误提示：
Compiling...
ben.c
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(176) : error C2095: 'preordertraverse' : actual parameter has type 'void' : parameter 2
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(176) : error C2198: 'preordertraverse' : too few actual parameters
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(177) : error C2095: 'preordertraverse' : actual parameter has type 'void' : parameter 2
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(177) : error C2198: 'preordertraverse' : too few actual parameters
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(185) : error C2095: 'inordertraverse' : actual parameter has type 'void' : parameter 2
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(185) : error C2198: 'inordertraverse' : too few actual parameters
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(187) : error C2095: 'inordertraverse' : actual parameter has type 'void' : parameter 2
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(187) : error C2198: 'inordertraverse' : too few actual parameters
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(195) : error C2095: 'postordertraverse' : actual parameter has type 'void' : parameter 2
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(195) : error C2198: 'postordertraverse' : too few actual parameters
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(196) : error C2095: 'postordertraverse' : actual parameter has type 'void' : parameter 2
d:\我的文档\procedure\树\benthy_tree\function_tree2.txt(196) : error C2198: 'postordertraverse' : too few actual parameters
Error executing cl.exe.

ben.obj - 12 error(s), 0 warning(s)

void preordertraverse(node *Tree, void (*p)(node *))    //先序遍历
{  
    if(Tree)
    {
        (*p)(Tree);
        preordertraverse(Tree->lchild, (*p)(Tree->lchild));
        preordertraverse(Tree->rchild, (*p)(Tree->rchild));
    }
}

可以这样写： preordertraverse(Tree->lchild, p); 你的(*p)(Tree->lchild)返回的是void型，preordertraverse的第二个参数是个函数指针。

thank you！