20160504课堂作业

0、 github

• github链接：https://github.com/H-BING/object-oriented/tree/master/20160504%20C%2B%2B1

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1、 题目

Create a program that asks for the radius of a circle and prints the area of that circle, using cin and cout. The whole program should be divided into two source files(.cpp). Hand in the source files and head files which you create.

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2、 代码

• Circle.h

   double ToCalculateCircleArea(double dCircleRadius);
  

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• Circle.cpp

   #include"Circle.h"
   #define PI 3.1415926535
   double ToCalculateCircleArea(double dCircleRadius) {
           double dCircleArea;
           dCircleArea = dCircleRadius*dCircleRadius*PI;
           return dCircleArea;
   }
  

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• Main.cpp

   #include<iostream>
   #include"Circle.h"
   using namespace std;
   
   int main() {
           double dRadius;
           cin >> dRadius;
           cout << ToCalculateCircleArea(dRadius) << endl;
           return 0;
   }