C语言使用宏的问题，以前没发现

folklore

1. #include <stdio.h>
   
2. #define VAR_GEN(i) int int_##i
   
3. int fun(){
   
4.         int i;
   
5.         for(i=0;i<10;i++) int int_i;
   
6.         return 0;
   
7. }
   
8. int main(){
   
9.         int i;
   
10.         for(i=0;i<10;i++) VAR_GEN(i);
    
11.         return 0;
    
12. }
    

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i don't know
i am test the following code in vs2008, and just as lz said , it can't be compiled

folklore

@qiwei9743
c++必须可以：

class a{
  public: a(){printf("hehe";};
};

for(; a ai;

folklore

1. class a{
   
2.   public: a(){printf("hehe");};
   
3. };
   
4. 
   
5. for(;;) a ai;

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