结构体+模版

代码：

#include<iostream>
using namespace std;
template <typename T>
struct Point{
    T x,y;
    Point(T x=0,T y=0)/*:x(x),y(y)*/{
    this->x=x;
    this->y=y;
    }
};
template<typename T>
Point<T> operator +(const Point<T> &A,const Point<T> &B){
    return Point<T>(A.x+B.x,A.y+B.y);
}
template<typename T>
ostream&operator<<(ostream &out,const Point<T> &p){
    out<<"("<<p.x<<","<<p.y<<")";
}
template<typename T>T sum(T *begin,T *end){
    T ans=0;
    for(T *p=begin;p!=end;p++){
        ans=ans+*p;
    }
    return ans;
}
int main(){
    Point<int> a;
    Point<int> b(1,2);
    a.x=3;
    Point<int> c=a+b;
    cout<<c<<endl;
    double m[]={1.1,2.2,3.3,4.4};
    cout<<sum(m,m+4)<<endl;
    Point<double> n[]={Point<double>(1.1,2.2),Point<double>(3.3,4.4),Point<double>(5.5,6.6),Point<double>(7.7,8.8)};
    cout<<sum(n,n+4)<<endl;
    return 0;
}