C++用类实现四则运算的练习

#include"iostream.h" void choose(double x,double y) { char z; //声明变量z cout<<"X="; cin>>x; cout<<"Y="; cin>>y; cout<<"Z="; cin>>z; switch (z) { case '1':cout<<"X+Y="<<x+y<<endl; //执行+运算 break; case '2':cout<<"X-Y="<<x-y<<endl; //执行-运算 break; case '3':cout<<"X*Y="<<x*y<<endl; //执行*运算 break; case '4':cout<<"X/Y="<<x/y<<endl; //执行/运算 break; } }