C++使用指针进行地址传递及错误示范
正确示范：
void change(int* a, int* b) {
int temp = *a;
*a = *b;
*b = temp;
}错误示范：
void change(int* a, int* b) {
int* temp = a;
a = b;
b = temp;
}
正确示范：
void change(int* a, int* b) {
int temp = *a;
*a = *b;
*b = temp;
}错误示范：
void change(int* a, int* b) {
int* temp = a;
a = b;
b = temp;
}