compile没问题，就是build时出现
main.obj : error LNK2001: unresolved external symbol "public: void __thiscall File<struct IndexItem,struct ElemType>::Append(char *,char *,struct ElemType)" (?Append@?$File@UIndexItem@@UElemType@@@@QAEXPAD0UElemType@@@Z)
main.obj : error LNK2001: unresolved external symbol "public: struct ElemType __thiscall File<struct IndexItem,struct ElemType>::inputElem(struct ElemType &)" (?inputElem@?$File@UIndexItem@@UElemType@@@@QAE?AUElemType@@AAU2@@Z)
Debug/mywork.exe : fatal error LNK1120: 2 unresolved externals
执行 link.exe 时出错.
小的实在菜，这是怎么一回事呢？希望众高手支招
//main.cpp
#include<string>
#include<stdlib.h>
#include<iostream.h>
#include<fstream.h>
#include<iomanip.h>
#include"file.h"
void main()
{ char *p1=".\\File.dat",*p2=".\\File.idx";
File<IndexItem,ElemType>myfile;
ElemType e; //记录元素
while(1){
cout<<"欢迎\n";
cout<<"1-增加记录\t 2-删除记录\t 3-查找记录\n 4-浏览记录\n ";
char choice;
cin>>choice;
switch(choice)
{case '1':
myfile.inputElem(e);
cout<<e.key<<endl<<e.length ;
myfile.Append(p1,p2,e);break;
}
}//end while
}
//file.h
#include<stdlib.h>
#include<stdio.h>
#include<fstream.h>
#include<iostream.h>
#include<string>
using namespace std;
typedef char KeyType;
//主文件的记录类型
struct ElemType{
KeyType key[10]; //关键字域
string content; //内容域
int length; //内容长度
};
//索引文件的记录类型
struct IndexItem{
KeyType key; //关键字域
int next; //对应记录位置
};
template<class T,class T1> //T==IndexItem;T1==ElemType
class File
{public:
ElemType inputElem(ElemType & e);
void Append(char*fn1,char*fn2,T1 );
};
//Elem.cpp
#include"file.h"
template<class T,class T1> //T==IndexItem;T1==ElemType
ElemType inputElem(T1 & e)
{
......
}
