阅读程序写结果：

1#include <iostream>2#include <string>3using namespace std;4 5void fun( char *a, char *b )6{7  a = b;8  (*a)++;9}10 11int main()12{13  char c1, c2, *p1, *p2;14  c1 = 'A';15  c2 = 'a';16  p1 = &c1;17  p2 = &c2;18  fun( p1, p2 );19  cout << c1 << c2 << endl;20  return(0);21}