//1
//golf.h
//for golf.cpp
const int Len = 40;
struct golf
{
    char fullname[Len];
    int handicap;
};
void setgolf(golf & g, const char * name, int hc);
int setgolf(golf & g);
void handicap(golf &g,int hc);
void showgolf(const golf & g);
//golf.cpp
#include<iostream>
#include"golf.h"

void setgolf(golf & g1, const char * name, int hc)
{
    for (int i = 0; i < strlen(name)+1; ++i) {
        g1.fullname[i] = name[i];
    }
    g1.handicap = hc;
}

int setgolf(golf & g1)
{
    using namespace std;
    cout << "please enter the name: ";
    cin.getline(g1.fullname, 40);
    if (strlen(g1.fullname))
        cout << "enter the hc: ",
        cin >> g1.handicap,
        cin.get();
    return 0;
}

void handicap(golf & g1, int hc)
{
    g1.handicap = hc;
}

void showgolf(const golf & g1)
{
    using namespace std;
    cout << "====the golf info====\n";
    cout << "the name is: " << g1.fullname << "\n";
    cout << "the hc is :" << g1.handicap << "\n";
}
//main.cpp
#include<iostream>
#include<iomanip> 
#include"golf.h"
int main()
{   
    using namespace std;
    int n,hc;
    golf ann;
    setgolf(ann, "Ann Birdfree", 24);
    showgolf(ann);
    cout << "please input the nums which you want to log: ";
    cin >> n;
    cin.get();
    golf *g = new golf[n+1];
    for (int i = 0; i < n; ++i) {
        cout << "#" << i + 1 << endl;
        setgolf(g[i]);
        showgolf(g[i]);
    }
    system("pause");
    return 0;
}
//2
#include<iostream>
#include<string>
using namespace std;
void strcount(const string s);
int main()
{   
    string input;
    string next;
    cout << "Enter a line:\n";
    getline(cin, input);
    while (input!="") {
        strcount(input);
        cout << "Enter next line (empty line to quit):\n";
        getline(cin, input);
    }
    cout << "It's empty line.Done.\n";
    system("pause");
    return 0;
}
void strcount(const string s)
{
    static int total = 0;
    int count = 0;
    cout << "\"" << s << "\" contains ";
    count = s.length();
    total += count;
    cout << count << " characters\n";
    cout << total << " characters total\n";
}
//3
#include<iostream>
#include<string>
using namespace std;
const int BUF = 50;
const int n = 5;
struct chaff {
    char dross[20];
    int slag;
};
chaff buf[BUF];
int main()
{   
    chaff *p1, *p2;
    p1 = new chaff[n];
    p2 = new (buf) chaff[n];
    cout << "please input the p1 info: \n";
    cin.getline(p1->dross, 20);
    cin >> p1->slag;
    char ch[BUF] = "we are the world";
    strcpy_s(p2->dross, strlen(ch) + 1, ch);
    p2->slag = strlen(ch);
    cout << "the new chaff[] form address: " << p1 << " Dross is: "  << p1->dross <<" Slag is: " <<p1->slag<<endl;
    cout << "the new chaff[] form address: " << p2 << " Dross is: " << p2->dross << " Slag is: " << p2->slag<<endl;
    system("pause");
    return 0;
}
//4
//sales.h
namespace SALES
{
    const int QUAETERS = 4;
    struct sales
    {
        double sale[QUAETERS];
        double average;
        double max;
        double min;
    };
    void setsales(sales &s, const double ar[], int n);
    void setsales(sales &s);
    void showsales(const sales &s);
    template <class T>
    int arrlen(T& array)
    {
        return (sizeof(array) / sizeof(array[0]));
    }
}
//sales.cpp
#include<iostream>
#include"sales.h"
namespace SALES
{
    void setsales(sales &s, const double ar[], int n = SALES::QUAETERS)
    {
        double sum = 0;
        s.max = -99999999;
        s.min = 99999999;
        for (int i = 0; i < n+1; ++i)
        {
            s.sale[i] = ar[i];
            sum += s.sale[i];
            s.max = ar[i] > s.max ? ar[i] : s.max;
            s.min = ar[i] < s.min ? ar[i] : s.min;
        }
        s.average = sum / n;
    }
    void setsales(sales &s)
    {
        s.max = -99999999;
        s.min = 99999999;
        std::cout << "please input the array size: ";
        int sum = 0;
        int n;
        std::cin >> n;
        std::cout << "please input the data: ";
        for (int i = 0; i < n; ++i)
            std::cin >> s.sale[i],
            sum += s.sale[i];
        for (int i = 0; i < n; ++i) {
            s.max = s.sale[i] > s.max ? s.sale[i] : s.max;
            s.min = s.sale[i] < s.min ? s.sale[i] : s.min;
        }
        s.average = sum / n;
    }
    void showsales(const sales  &s)
    {
        std::cout << "*****the info*****\n";
        std::cout << "the sales:" << std::endl;
        for (int i = 0; i < arrlen(s.sale); ++i)
            std::cout << s.sale[i] << "\t\n";
        std::cout << "the average: " << s.average << "\n";
        std::cout << "the min: " << s.min << "\n";
        std::cout << "the max: " << s.max << "\n";
    }
}
//main.cpp
#include<iostream>
#include<string>
#include"sales.h"

int main()
{   
    double a[4] = { 1,2,3,4 };
    SALES::sales s1;
    SALES::sales s2;
    SALES::setsales(s1, a, 3);
    SALES::showsales(s1);
    SALES::setsales(s2);
    SALES::showsales(s2);
    system("pause");
    return 0;
}