#include <iostream>using std::cout;using std::endl;//定义结构struct Box{	double length;	double width;	double height;};double volume(const Box& aBox);int main(){	Box box={70.0,60.0,40.0};	double boxVolume=volume(box);	cout << "Size of box is:"<<endl		<< "length:"<<box.length<<endl		<<"width:"<<box.width<<endl		<<"height:"<<box.height<<endl;	cout <<"Voluem of box is:"<<boxVolume<<endl;	return 0;	} //计算体积的函数double volume(const Box& box){	return box.length*box.width*box.height;}