Code to achieve the function of relatively simple, is to compare a, b, c three size, main is to want to use a pointer and macro definition,
But it is an error, but I also don't understand is what problem, ask bosses look,

CodePudding user response:

I doubt that is a question of macro definition cannot use pointer, then didn't also add * in the macro definition, but it is wrong,

CodePudding user response:

Reference:

 # include 

T=# define change (a, b), (a) (a)=(b), (b)=(t 
# define compare (a, b) (a) & gt; (b)? Change ((a), (b)) : NULL 

Int main () 
{
Int * a * b * c, t, a, b, c; 
The scanf (" % d % d % d ", & amp; A, & amp; B, & amp; C); 
A=& amp; A; B=& amp; B; C=& amp; C; 
Printf (" % d, % d, % d \ n ", * a, *, b * c); 

Compare (* (a), (* b)); 
Compare (* (a), (* c)); 
Compare ((* b), (* c)); 
2: printf (" % d, % d, % d \ n ", * a, *, b * c); 

return 0; 
}