实验6

#include <stdio.h>

#define N 10

typedef 
struct {
    
char isbn[20];          
    
char name[80];        
    
char author[80];        
    
double sales_price; 
    
int  sales_count;      
} Book;


void output(Book x[], int n);

void sort(Book x[], int n);

double sales_amount(Book x[], int n);


int main() {
     Book x[N] 
= {{"978-7-5327-6082-4", "门将之死", "罗纳德.伦", 42, 51},
                  {
"978-7-308-17047-5", "自由与爱之地：入以色列记", "云也退", 49 , 30},
                  {
"978-7-5404-9344-8", "伦敦人", "克莱格泰勒", 68, 27},
                  {
"978-7-5447-5246-6", "软件体的生命周期", "特德姜", 35, 90}, 
                  {
"978-7-5722-5475-8", "芯片简史", "汪波", 74.9, 49},
                  {
"978-7-5133-5750-0", "主机战争", "布莱克.J.哈里斯", 128, 42},
                  {
"978-7-2011-4617-1", "世界尽头的咖啡馆", "约翰·史崔勒基", 22.5, 44},
                  {
"978-7-5133-5109-6", "你好外星人", "英国未来出版集团", 118, 42},
                  {
"978-7-1155-0509-5", "无穷的开始:世界进步的本源", "戴维·多伊奇", 37.5, 55},
                  {
"978-7-229-14156-1", "源泉", "安.兰德", 84, 59}};
    
    printf(
"图书销量排名(按销售册数): \n");
    sort(x, N);
    output(x, N);

    printf(
"\n图书销售总额: %.2f\n", sales_amount(x, N));
    
    
return 0;
}


void output(Book x[], int n) {
    
int i;
    printf(
"%-20s %-30s %-20s %-10s %-10s\n","ISBN号","书名", "作者", "售价", "销售册数");
    
for (i=0;i<n;i++) {
        printf(
"%-20s %-30s %-20s %-10.2f %-10d\n",x[i].isbn,x[i].name,x[i].author,x[i].sales_price,x[i].sales_count);
    }
}


void sort(Book x[], int n) {
    
int i, j;
    
for (i = 0; i < n - 1 ; i++) {
        
for (j = 0; j < n - 1 - i; j++) {
            
if (x[j].sales_count < x[j + 1].sales_count) {
                Book temp 
= x[j];
                x[j] 
= x[j+1];
                x[j
+1] = temp;
            }
        }
    }
}


double sales_amount(Book x[], int n) {
    
double sum = 0;
    
int i;
    
for (i = 0; i < n; i++) {
        sum 
+= x[i].sales_price * x[i].sales_count;
    }
    
return sum;
}

#include <stdio.h>

typedef struct {
    int year;
    int month;
    int day;
} Date;

void input(Date *pd);                   
int day_of_year(Date d);              
int compare_dates(Date d1, Date d2);  
                                      
                                        
                                        

void test1() {
    Date d;
    int i;

    printf("输入日期:(以形如2024-12-16这样的形式输入)\n");
    for(i = 0; i < 3; ++i) {
        input(&d);
        printf("%d-%02d-%02d是这一年中第%d天\n\n", d.year, d.month, d.day, day_of_year(d));
    }
}

void test2() {
    Date Alice_birth, Bob_birth;
    int i;
    int ans;

    printf("输入Alice和Bob出生日期:(以形如2024-12-16这样的形式输入)\n");
    for(i = 0; i < 3; ++i) {
        input(&Alice_birth);
        input(&Bob_birth);
        ans = compare_dates(Alice_birth, Bob_birth);
        
        if(ans == 0)
            printf("Alice和Bob一样大\n\n");
        else if(ans == -1)
            printf("Alice比Bob大\n\n");
        else
            printf("Alice比Bob小\n\n");
    }
}

int main() {
    printf("测试1: 输入日期, 打印输出这是一年中第多少天\n");
    test1();

    printf("\n测试2: 两个人年龄大小关系\n");
    test2();
}


void input(Date *pd) {
   scanf("%d-%d-%d-", &(pd->year),&(pd->month),&(pd->day)); 
}


int day_of_year(Date d) {
    int days_per_month[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    int days = d.day;
    int i;
    if ((d.year % 4 == 0 && d.year % 100 != 0) || (d.year % 400 == 0)) {
        days_per_month[2] = 29;
    }
    for (i = 1; i < d.month;i++) {
        days += days_per_month[i];
    }
    return days;
}


int compare_dates(Date d1, Date d2) {
    int year1 = d1.year;
    int year2 = d2.year;
    int day1 = day_of_year(d1);
    int day2 = day_of_year(d2);
    if (year1 < year2) {
        return -1;
    }
    else if (year1 > year2) {
        return 1;
    }
    else if (day1 < day2) {
        return -1;
    }
    else if (day1 > day2) {
        return 1;
    }
    else {
        return 0;
    }
}

#include <stdio.h>
#include <string.h>

typedef struct {
    char name[20];     
    char phone[12];    
    int  vip;         
} Contact; 


// 函数声明
void set_vip_contact(Contact x[], int n, char name[]);  
void output(Contact x[], int n);  
void display(Contact x[], int n);  


#define N 10
int main() {
    Contact list[N] = {{"刘一", "15510846604", 0},
                       {"陈二", "18038747351", 0},
                       {"张三", "18853253914", 0},
                       {"李四", "13230584477", 0},
                       {"王五", "15547571923", 0},
                       {"赵六", "18856659351", 0},
                       {"周七", "17705843215", 0},
                       {"孙八", "15552933732", 0},
                       {"吴九", "18077702405", 0},
                       {"郑十", "18820725036", 0}};
    int vip_cnt, i;
    char name[20];

    printf("显示原始通讯录信息: \n"); 
    output(list, N);

    printf("\n输入要设置的紧急联系人个数: ");
    scanf("%d", &vip_cnt);
    
    printf("输入%d个紧急联系人姓名:\n", vip_cnt);
    for(i = 0; i < vip_cnt; ++i) {
        scanf("%s", name);
        set_vip_contact(list, N, name);
    }

    printf("\n显示通讯录列表:(按姓名字典序升序排列,紧急联系人最先显示)\n");
    display(list, N);

    return 0;
}


void set_vip_contact(Contact x[], int n, char name[]) {
   int i;
   for (i = 0;i < n;i++) {
       if (strcmp(x[i].name,name) == 0){
           x[i].vip = 1;
       }
   }
}


void display(Contact x[], int n) {
   int i,j=0;
    Contact t;
    for(i=0;i<n-1;i++){
          for(j=0;j<n-i-1;j++){
           if(x[j].vip<x[j+1].vip){
                 t=x[j];
                 x[j]=x[j+1];
                 x[j+1]=t;
             }
            else if(x[j].vip==x[j+1].vip&&strcmp(x[j].name,x[j+1].name)>0){
                 t=x[j];
                 x[j]=x[j+1];
                 x[j+1]=t;

#include <stdio.h>
#include <string.h>

enum Role {admin, student, teacher};

typedef struct {
    char username[20];  
    char password[20];  
    enum Role type;   
} Account;



void output(Account x[], int n);    

int main() {
    Account x[] = {{"A1001", "123456", student},
                    {"A1002", "123abcdef", student},
                    {"A1009", "xyz12121", student}, 
                    {"X1009", "9213071x", admin},
                    {"C11553", "129dfg32k", teacher},
                    {"X3005", "921kfmg917", student}};
    int n;
    n = sizeof(x)/sizeof(Account);
    output(x, n);

    return 0;
}




void output(Account x[], int n) {
   int i, j;
   for (i = 0; i < n;i++) {
       printf("%-10s",x[i].username);
       for (j = 0; j < strlen(x[i].password);j++) {
       printf("*");
   }
    printf("%-10s","");
    if (x[i].type == admin) {
        printf("%-20s\n","admin");
    }
    else if (x[i].type == student){
        printf("%-20s\n","student");
    }
    else if (x[i].type == teacher){
        printf("%-20s\n","teacher");
    }
    }
}

 

             }
         }
     }
    output(x,n);
    
}

void output(Contact x[], int n) {
    int i;

    for(i = 0; i < n; ++i) {
        printf("%-10s%-15s", x[i].name, x[i].phone);
        if(x[i].vip)
            printf("%5s", "*");
        printf("\n");
    }
}