is it possible to find size of variables in other files which define in another files?

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C

structures

Here is my question: three .c file is defined , in two file contains structure variable. And another file having array variable which contains name of structure variables.

it is possible to find size of stucture.

//one.c

               void one()
                        {
                          struct a{                    //define structure in .c file
                              int al;
                              char b;
                              };
                             typedef struct a a11;
                         }

  //two.c
                      //define structure variables in .c file
void two()
                          {
                              struct a1{
                                     int c1;
                                       };
                                  typedef struct a1 a111;
                                  struct b1{
                                          char c2;
                                          char g;
                                            };
                                  typedef struct a1 a111;
                            }

here another file three.c,

void main{

 char a[3][10]   //two dimmensional array for storing
                       name of variables.

   printf("%d",sizeof(a[0]))  ;
    }

//which stored structure variables name;
my question is: it is possible to find size of a11,a111 in this file.