读程题: 1. #include < iostream. h> #include <math.h> class calculator dpublic: double add(double x, double y) double sub(double x, double y); double mul(double x, double y); double div(double x, double y); double calculator: add(double x, double y) freturn x+y; double Calculator sub(double x, double y) Rreturn x-y;) double Calculator: mul(double x, double y) return xy, double Calculator: div(double x, double y) freturn x/y;) void maino i Calculator val; c0ut<< val. mu( val.add(2,3),a.su运行结果为: C+程序设计课件设计制作-5C++程序设计课件 设计制作：徐龙琴 9 三 读程题： 1．#include <iostream.h> #include <math.h> class Calculator {public: double add(double x,double y); double sub(double x,double y); double mul(double x,double y); double div(double x,double y);}; double Calculator::add(double x,double y) {return x+y;} double Calculator::sub(double x,double y) {return x-y;} double Calculator::mul(double x,double y) {return x*y;} double Calculator::div(double x,double y) {return x/y;} void main() { Calculator val; cout<<val.mul(val.add(2,3),val.sub(运行结果为： 2,3))<<endl;} -5