非模板类,可以有模板函数么?

songweibo

我用VC8编译下面的代码提示错误:

1. 
   
2. #include "stdafx.h"
   
3. 
   
4. class my{
   
5. public:
   
6.     my():i(2),j(3){printf("ctor\n");}
   
7.     ~my(){printf("dtor\n");}
   
8. 
   
9.         template<class T>
   
10.         vod add( T t ){
    
11.                 i+=t;
    
12.         }
    
13. private
    
14.     int i,j;
    
15. };
    
16. int main(int argc,char**){
    
17.         my m1;
    
18.         m1.add<short>(3);
    
19.     return 0;
    
20. }
    

复制代码

提示我有一堆错误:
1>my.cpp(9): error C2146: syntax error : missing ';' before identifier 'add'
1>my.cpp(9): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>my.cpp(9): error C2238: unexpected token(s) preceding ';'
1>my.cpp(11): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>my.cpp(11): error C2143: syntax error : missing ';' before '<end Parse>'
1>my.cpp(11): warning C4183: 'add': missing return type; assumed to be a member function returning 'int'
1>my.cpp(13): error C2238: unexpected token(s) preceding ';'
1>my.cpp(5): error C2614: 'my' : illegal member initialization: 'j' is not a base or member
1>my.cpp(5): error C2614: 'my' : illegal member initialization: 'i' is not a base or member
1>my.cpp(17): error C2065: 'm1' : undeclared identifier
1>my.cpp(17): error C2062: type 'short' unexpected

如果我在class 前面加上模板声明
template<class U>
使用的时候变成        my<int> m1;
这次错误更多了

1>my.cpp(9): error C2146: syntax error : missing ';' before identifier 'add'
1>          my.cpp(14) : see reference to class template instantiation 'my<U>' being compiled
1>my.cpp(9): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>my.cpp(9): error C2238: unexpected token(s) preceding ';'
1>my.cpp(9): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>my.cpp(9): error C2143: syntax error : missing ';' before '<end Parse>'
1>my.cpp(9): warning C4183: 'add': missing return type; assumed to be a member function returning 'int'
1>my.cpp(13): error C2238: unexpected token(s) preceding ';'
1>my.cpp(9): error C2146: syntax error : missing ';' before identifier 'add'
1>          my.cpp(16) : see reference to class template instantiation 'my<U>' being compiled
1>          with
1>          [
1>              U=int
1>          ]
1>my.cpp(9): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>my.cpp(9): error C2238: unexpected token(s) preceding ';'
1>my.cpp(9): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>my.cpp(9): error C2143: syntax error : missing ';' before '<end Parse>'
1>my.cpp(9): warning C4183: 'add': missing return type; assumed to be a member function returning 'int'
1>my.cpp(13): error C2238: unexpected token(s) preceding ';'

到底错在哪里呢?

Moon_Bird

#include "stdafx.h"

class my{
public:
    my():i(2),j(3){printf("ctor\n");}
    ~my(){printf("dtor\n");}

        template<class T>
        void add( T t ){
                i+=t;
        }
private:
    int i,j;
};
int main(int argc,char** argv){
        my m1;
        m1.add<short>(3);
    return 0;
}

giantchen

你换一个支持语法高亮的编辑器吧。
你把 void 拼错了。