vc++ 6.0 不支持模板？？？？
template <typename Any>void swap (Any &i, Any &j) //引用不是必须的，可以不用{ Any temp; temp = i; i = j; j = temp;}int main(){ int a = 10; int b = 20; cout << "a = " << a << endl << "b = " << b << endl; swap(a, b); cout << "use after swap() \n" << "a = " << a << endl << "b = " << b << endl; char c = 'x'; char d = 'y'; cout << "c = " << c << endl << "d = " << d << endl; swap(c, d); cout << "use after swap() \n" << "c = " << c << endl << "d = " << d << endl; return 0;}