C++primer plus 6th 第7章7.3编程答案

#include <iostream>
using namespace std;
struct box
{
    char maker[40];
    float height;
    float width;
    float length;
    float volume;
};
void func1(box a);
void func2(box * ar);
int main() {
    box ar={
        "canon",
        12.3,
        4.2,
        6.7,
        9.3
    };
    func1(ar);
    func2(&ar);
    cout<<"\nNew struct:"<<endl;
    func1(ar);
    return 0;
}
void func1(box a)
{
    cout<<"maker: "<<a.maker<<endl;
    cout<<"height: "<<a.height<<endl;
    cout<<"width: "<<a.width<<endl;
    cout<<"length: "<<a.length<<endl;
    cout<<"volume: "<<a.volume<<endl;
}
void func2(box * ar)
{
    ar->volume=ar->height*ar->width*ar->length;
}