请教下g++编译问题

[hexiangnc]

#include <iostream>

using namespace std;

struct link{
int data;
link * next;
};

void createlink(link * head)
{
int num = 0;
int loop = 0;
link * p = NULL;
link * q = NULL;

cout << "请输入链表节点的个数：";
cin >> num;

p = head;

cout << "请输入表中节点的元素：" << endl;
for (; loop < num; loop++)
{
q = new link;
cin >> q->data;
p-> next = q;
p = q;
}
p->next = NULL;
}
void showlink(link * head)
{
link * p = NULL;

cout << "得到如下的单链表：" << endl;
for (p = head->next; p != NULL; p = p->next)
{
cout << p->data << "->";
}
cout << "NULL" << endl;
}

int main()
{
link * head = NULL;

head = new link;
head->next = NULL;

createlink(head);
showlink(head);

return 0;
}

在vc下编译没有错误。用g++编译

t1.cpp:12:17: error: variable or field ‘createlink’ declared void
test1.cpp:12:24: error: ‘head’ was not declared in this scope
为什么？？

[小坏猪猪]

[Quote=引用楼主 hexiangnc 的回复:]

#include <iostream>

using namespace std;

struct link{
int data;
link * next;
};

void createlink(link * head)
{
int num = 0;
int loop = 0;
link * p = NULL……
[/Quote]

在createlink函数里面加上return;






********************************************************************************
* C++经典之作下载链接：http://blog.csdn.net/jerryjbiao/article/details/7358796 *
********************************************************************************

[zhaohongbo84]

typedef struct link{
int data;
link * next;
} link;

[hexiangnc]

上面两位大哥的方法不行

[pengchy]

#include <iostream>

using namespace std;

typedef struct tagLINK{
  int data;
  struct tagLINK* next;
} LINK;

void createlink(LINK* head)
{
  int num = 0;
  int loop = 0;
  LINK* p = NULL;
  LINK* q = NULL;

  cout << "请输入链表节点的个数：";
  cin >> num;
    
  p = head;

  cout << "请输入表中节点的元素：" << endl;
  for (; loop < num; loop++)
  {
    q = new LINK;
    cin >> q->data;
    p-> next = q;
    p = q;
  }
  p->next = NULL;
}

void showlink(LINK* head)
{
  LINK* p = NULL;

  cout << "得到如下的单链表：" << endl;
  for (p = head->next; p != NULL; p = p->next)
  {
    cout << p->data << "->";
  }
  cout << "NULL" << endl;
}

int main()
{
  LINK* head = NULL;

  head = new LINK;
  head->next = NULL;

  createlink(head);
  showlink(head);

  return 0;
}

[qixing1115]

[Quote=引用 4 楼 pengchy 的回复:]
C/C++ code


#include <iostream>

using namespace std;

typedef struct tagLINK{
int data;
struct tagLINK* next;
} LINK;

void createlink(LINK* head)
{
int num = 0;
int loop = 0;……
[/Quote]
这个和我想的差不多

[鲲尘千古]

link是linux的库函数中的，你用这个的话，编译器以为是库函数里的，它会认为你没有包含头文件，你不要用这个名字，像楼上的，换个名字就好了。