实验6

task1

#include<stdio.h>
#include<string.h>
#define N 3
typedef struct student{
    int id;
    char name[20];
    char subject[20];
    double perf;
    double mid;
    double final;
    double total;
    char level[10];
}stu;
void input(stu[],int);
void output(stu[],int);
void calc(stu[],int);
int fail(stu[],stu[],int);
void sort(stu[],int);
int main(){
    stu st[N],fst[N];
    int k;
    printf("录入学生成绩信息\n");
    input(st,N);
    printf("\n成绩处理...\n");
    calc(st,N);
    k=fail(st,fst,N);
    sort(st,N);
    printf("\n学生成绩排名情况：\n");
    output(st,N);
    printf("不及格学生信息：\n");
    output(fst,k);
    return 0;
}
void input(stu s[],int n){
    int i;
    for(i=0;i<n;i++){
        scanf("%d %s %s %lf %lf %lf",
        &s[i].id,s[i].name,s[i].subject,&s[i].perf,
        &s[i].mid,&s[i].final);
    }
}
void output(stu s[],int n){
    int i;
    printf("----------------\n");
    printf("学号   姓名     科目   平时   期中   期末   总评   等级\n");
    for(i=0;i<n;i++){
        printf("%d   %-6s   %-4s   %-4.0f   %-4.0f   %-4.0f   %-4.1f   %s\n",
        s[i].id,s[i].name,s[i].subject,s[i].perf,
        s[i].mid,s[i].final,s[i].total,s[i].level);
    }
}
void calc(stu s[],int n){
    int i;
    for(i=0;i<n;i++){
        s[i].total=s[i].perf*0.2+s[i].mid*0.2+s[i].final*0.6;
        if(s[i].total>=90){
            strcpy(s[i].level,"优"); 
        }
        else if(s[i].total>=80){
            strcpy(s[i].level,"良");
        }
        else if(s[i].total>=70){
            strcpy(s[i].level,"中");
        }
        else if(s[i].total>=60){
            strcpy(s[i].level,"及格");
        }
        else{
            strcpy(s[i].level,"不及格"); 
        }
    }
}
int fail(stu s[],stu t[],int n){
    int i,cnt=0;
    for(i=0;i<n;++i){
        if(s[i].total<60){
            t[cnt++]=s[i];
        }
    }
    return cnt;
}
void sort(stu s[],int n){
    int i,j;
    stu t;
    for(i=0;i<n;++i){
        for(j=0;j<n-1-i;++j){
            if(s[j].total<s[j+1].total){
                t=s[j];
                s[j]=s[j+1];
                s[j+1]=t;    
            }
        }
    }
}

task2

#include<stdio.h>
#include<string.h>
#define N 10
#define M 80
typedef struct {
    char name[M];
    char author[M];
}book;
int main(){
    book x[N] = { {"《一九八四》", "乔治.奥威尔"},
                  {"《美丽新世界》", "赫胥黎"},
                  {"《昨日的世界》", "斯蒂芬.茨威格"}, 
                  {"《万历十五年》", "黄仁宇"},
                  {"《一只特立独行的猪》", "王小波"},
                  {"《百年孤独》", "马尔克斯"},
                  {"《查令十字街84号》", "海莲.汉芙"},
                  {"《只是孩子》", "帕蒂.史密斯"}, 
                  {"《刀锋》", "毛姆"},
                  {"《沉默的大多数》", "王小波"} };
    book *ptr;
    int i;
    char author[M];
    int found;
    printf("-------------------所有图书信息-------------------\n");
    for(ptr=x;ptr<x+N;ptr++){
        printf("%-30s%-30s\n",ptr->name,ptr->author);
    } 
    printf("\n-------------------按作者查询图书-------------------\n");
    printf("输入作者名: ");
    gets(author);
    found=0;
    for(ptr=x;ptr<x+N;ptr++){
        if(strcmp(ptr->author,author)==0){
            found=1;
            printf("%-30s%-30s\n",ptr->name,ptr->author);
        }
    }
    if(!found){
        printf("暂未收录该作者书籍\n"); 
    }
    return 0;
}

task3-1

#include<stdio.h>
#include<stdlib.h>
#define N 80
typedef struct filminfo{
    char name[N];
    char director[N];
    char region[N];
    int year; 
    struct filminfo *next;
}film;
void output(film *head);
film *insert(film *head,int n); 
int main(){
    int n;
    film *head;
    head=NULL;
    printf("输入影片数目: ");
    scanf("%d",&n);
    head=insert(head,n);
    printf("\n所有影片信息如下: \n");
    output(head);
    return 0;
} 
film *insert(film *head,int n){
    int i;
    film *p;
    for(i=1;i<=n;++i){
        p=(film *)malloc(sizeof(film));
        printf("请输入第%d部影片信息: ", i);
        scanf("%s %s %s %d",p->name,p->director,p->region,&p->year);
        p->next=head;
        head=p;
    }
    return head;
}
void output(film *head){
    film *p;
    p=head;
    while(p!=NULL){
        printf("%-20s %-20s %-20s %d\n",p->name ,p->director ,p->region ,p->year );
        p=p->next;
    }
}

task3-2

#include <stdio.h>
#include <stdlib.h>
#define N 80
typedef struct FilmInfo {
    char name[N];
    char director[N];
    char region[N];
    int year;
    struct FilmInfo *next;
} Film;
void output(Film *head);  
Film *insert(Film *head, int n);  
int main() {
    int n;          
    Film *head;     
    Film *p;  
    p = (Film *)malloc(sizeof(Film));
    p->next = NULL;
    head = p;   
    printf("输入影片数目: ");
    scanf("%d", &n);
    head = insert(head, n);
    printf("\n所有影片信息如下: \n");
    output(head);
    return 0;
}
Film *insert(Film *head, int n) {
    int i;
    Film *p;
    for(i = 1; i <= n; ++i) {
        p = (Film *)malloc(sizeof(Film));
        printf("请输入第%d部影片信息: ", i);
        scanf("%s %s %s %d", p->name, p->director, p->region, &p->year);
        p->next = head->next;
        head->next = p;
    }
    return head;
}
void output(Film *head) {
    Film *p;
    p = head->next;
    while(p != NULL) {
        printf("%-20s %-20s %-20s %d\n", p->name, p->director, p->region, p->year);
        p = p -> next;
    }
}

task4

#include<stdio.h>
#define N 10
typedef struct{
    char isbn[20];
    char name[80];
    char author[80];
    double saleprice;
    int salecount;
    double saleamout;
}book;
void output(book x[],int n);
void sort(book x[],int n);
double saleamount(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", saleamount(x, N));
    return 0;
}
void sort(book x[],int n){
    int i,j;
    book t;
    for(i=0;i<n;++i){
        for(j=0;j<n-1-i;++j){
            if(x[j].salecount<x[j+1].salecount){
            t=x[j];
            x[j]=x[j+1];
            x[j+1]=t;
            }
        }
    }
}
void output(book x[],int n){
    int i;
    printf("ISBN号            书名                      作者                  售价         销售册数\n");
    for(i=0;i<n;++i){
        printf("%-10s %-25s %-20s  %.1lf %10d\n",x[i].isbn,x[i].name,x[i].author,
                                              x[i].saleprice,x[i].salecount);
    }
}
double saleamount(book x[],int n){
    int i;
    double sum=0.0;
    for(i=0;i<n;++i){
        sum+=x[i].saleprice*x[i].salecount;
    }
    return sum;
}

task5

#include<stdio.h>
typedef struct{
    int year;
    int month;
    int day;
}date;
void input(date *pd);
int dateofyear(date d);
int comdates(date d1,date d2);
void test1() {
    date d;
    int i;

    printf("输入日期:(以形如2025-12-19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, dayofyear(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2025-12-19这样的形式输入)\n");
    for(i = 0; i < 3; ++i) {
        input(&Alice_birth);
        input(&Bob_birth);
        ans = comdates(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();
    return 0;
} 
void input(date *pd){
        scanf("%d-%d-%d",&pd->year,&pd->month,&pd->day);
}
int dayofyear(date d){
    int total=0,i;
    int a[]={31,28,31,30,31,30,31,31,30,31,30,31};
    if(d.year%400==0||(d.year%4==0&&d.year%100==0)){
        a[1]=29;
    }
    for(i=0;i<d.month-1;++i){
        total+=a[i];
    }
    total+=d.day;
    return total;
}
int comdates(date d1,date d2){
    int ans;
    if(d1.year<d2.year){
        ans=-1;
    }
    else if(d1.year>d2.year){
        ans=1;
    } 
    else {
        if(d1.month<d2.month){
            ans=-1;
        }
        else if(d1.month>d2.month){
            ans=1;
        }
        else{
            if(d1.day<d2.day){
                ans=-1;
            }
            else if(d1.day>d2.day){
                ans=1;
            }
            else{
                ans=0;
            }
        }
    }
return ans;
}

task6

#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(){
    int n;
    account x[] = {{"A1001", "123456", student},
                    {"A1002", "123abcdef", student},
                    {"A1009", "xyz12121", student}, 
                    {"X1009", "9213071x", admin},
                    {"C11553", "129dfg32k", teacher},
                    {"X3005", "921kfmg917", student}};
    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);
        int len=strlen(x[i].password);
        for(j=0;j<n;++j){
            printf("*");
        }
        printf("     ");
        switch(x[i].type){
        case admin:printf("admin\n");break;
        case student:printf("student\n");break;
        case teacher:printf("teacher\n");break;
        default:printf("wrong");
        }
        printf("\n");
    }
}

task7

#include<stdio.h>
#include<string.h>
#define N 10
typedef struct{
    char name[20];
    char phone[12];
    int vip;
}contact;
void setvipcontact(contact x[],int n,char name[]);
void output(contact x[],int n);
void display(contact x[],int n);
int main(){
    int cnt,i;
    char name[20];
    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}};
    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", &cnt);
    printf("输入%d个紧急联系人姓名:\n",cnt);
    for(i = 0; i < cnt; ++i) {
        scanf("%s", name);
        setvipcontact(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 setvipcontact(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;
    contact temp;
    for(i=0;i<n;++i){
        for(j=0;j<n-1-i;++j){
            if(strcmp(x[j].name,x[j+1].name)>0){
                temp=x[j];
                x[j]=x[j+1];
                x[j+1]=temp;
            }
        }
    }
    for(i=0;i<n;++i){
        for(j=0;j<n-1-i;++j){
            if(x[j].vip<x[j+1].vip){
                temp=x[j];
                x[j]=x[j+1];
                x[j+1]=temp;
            }
        }
    }
    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");
    }
}