#include <iostream>
using namespace std;
void fun(char *a, char *b) {
a = b;
(*a)++; }
int main() {
char c1, c2, *p1, *p2;
c1 = 'A';
c2 = 'a';
p1 = &c1;
p2 = &c2;
fun(p1, p2);
cout << c1 << c2 << endl;
return 0;
}输出:_________