#include <iostream>

using namespace std;

class test

{

double x;

double y;

public:

test(double A);

test(double a,double b);

};

test :: test(double A)

{

cout<<“这个数字是：”<<endl;

}

test::test(double a,double b)

{

x=a+b;

y=a*b;

}

int main()

{

double x,y,a,b;

test(3.5,8.5);

cout<<“请输入两个数”<<endl;

cin>>a>>b;

x=a+b;

y=a*b;

cout<<a<<“+”<<b<<“=”<<x<<endl;

cout<<a<<“*”<<b<<“=”<<y<<endl;

return 0;

}