#include"iostream.h"
void main()
{
double area(double r,double*girth,double pi =3.14159);area(2); dou
void main()
{
double area(double r,double*girth,double pi =3.14159);area(2); dou
阅读背景：
用double area(double r,double*girth,double pi =3.14159);求圆的面积和周长double*girth是什么意思
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