因为这几天在重学c++,说来也是惭愧,以前学习的时候一般学到多态那里就结束了,后面的模板类和stl都没有看过
终于下定决心看了看,发现模板类很方便,上demo
#include<iostream>
using namespace std;
struct Point {
int x, y;
Point(int x=0, int y=0):x(x),y(y) {}
};
//ostream 是输出流
ostream& operator << (ostream &out, const Point& p) {
out << "(" << p.x << "," << p.y << ")";
return out;
}
//该模板类用来交换两个变量的值
template<typename T>
void swap3(T& a,T& b)
{
T t = a;
a = b;
b = t;
}
int main() {
Point a(1,2),b(3,4);
cout<<"a:"<<a<<" b:"<<b<<endl;
swap3(a,b);
cout<<"a:"<<a<<" b:"<<b<<endl;
return 0;
}