passref.cpp

本课程主要介绍面向对象程序设计的方法和c++语言的基本概念。以c++语言中的面向对象机制为主。学习者在学习过程中可以通过大量的程序实例和相关练习

// passref.cpp
// arguments passed by reference
#include <iostream>
using namespace std;

int main()
   {
   void centimize(double&);    //prototype

   double var = 10.0;          //var has value of 10 inches
   cout << "var = " << var << " inches" << endl;

   centimize(var);             //change var to centimeters
   cout << "var = " << var << " centimeters" << endl;
   return 0;
   }
//--------------------------------------------------------------
void centimize(double& v)
   {
   v *= 2.54;                  //v is the same as var
   }