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我是新手,我正在学习C语言.编译以下代码时出现错误.

Constans.h

#define ERROR 0   
#define TRUE 1  
#define FALSE 0  
#define OK 1  
#define INFEASIBLE -1  
#define OVERFLOW -2  
typedef int Status;  

ArrayList.h

#include"Constans.h"  
#define LIST_INIT_SIZE 100  
#define LIST_INCREMENT 20  
typedef struct{  
int *elem;  
int length;  
int listsize;  
}SqList;  
extern Status InitList_sq(Sqlist *l);  
extern Status ListInsert_sq(Sqlist *l,int i,int e);  
extern Status ListDelete_sq(Sqlist *l,int i,int *e);  
extern void MergeList_sq(Sqlist La,Sqlist Lb,Sqlist *Lc);  
extern void ListTraverse(Sqlist l,void(*visit)(void));  

program.c

#include<stdio.h>  
#include "ArrayList.h"  
int main(){  
return 0;  
}  

我的环境:
操作系统:Mac OS X 10.9.1版本 …