析构函数，构造函数

#include<iostream.h>class test{int a,b;public:test(int x,int y){a=x;b=y;cout<<"调用构造函数test()"<<endl;}void print(){cout<<"两数相减得"<<a-b<<endl;                                    }~test(){cout<<"调用析构函数test()"<<endl;}};void main(){int a1,b1;cout<<"请输入两个数"<<endl;cin>>a1>>b1;test t(a1,b1);t.print();}