实验一.3

#include<iostream>using namespace std;template<typename T>class std1{public:std1(T a,T b){x=a;y=b;}template<typename T>T std1(T x,T y){return x+y;}template<typename B>B std2(B x,B y){return x*y;}private:T x,y;};int main(){int a,b;  double n,m;  cout<<"enter a and b: "<<endl; cin>>a>>b;  cout<<"enter n and m: "<<endl;  cin>>n>>m;  std1 A(a,b) ,B(n,m);   A <int> std1(a,b);   A <int> std2(a,b);   B <double> std1(n,m);   B <double> std2(n,m);return 0;}