C++ primer plus 第八章编程练习2答案

#include <iostream>
#include <string>
struct CandyBar
{
    std::string name;
    double weight;
    int energy;
};

CandyBar & stinput(CandyBar &, std::string n = "Millennium Munch", double w = 2.85, int e = 350);
void stshow(CandyBar &);

int main()
{
    using namespace std;
    int energy;
    double weight;
    string name;
    CandyBar candy;
    stshow(stinput(candy));
    cout << "输入品牌的名称" << endl;
    getline(cin, name);
    cout << "输入重量" << endl;
    cin >> weight;
    cout << "输入热量" << endl;
    cin >> energy;
    stshow(stinput(candy, name, weight, energy));
    return 0;
}
CandyBar & stinput(CandyBar & C, std::string n, double w, int e)
{
    C.name = n;
    C.weight = w;
    C.energy = e;
    return C;
}
void stshow(CandyBar & C)
{
    std::cout << "candy的品牌名称是 " << C.name << std::endl;
    std::cout << "candy的重量是 " << C.weight << std::endl;
    std::cout << "candy的热量是 " << C.energy << std::endl;
}

把函数定义中的std::string 换为char * 就是书中的要求，不过我习惯用string类来存储字符串