实验6

t4

 

#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("ISBN号\t\t\t书名\t\t\t  作者\t\t\t售价\t销售册数\n");
    for(i=0;i<n;++i)
    printf("%-20s%-30s%-20s%.1f\t%d\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;
    book t;
    for(i=0;i<n;++i){
        for(j=0;j<n-i;++j){
            if(x[j].sales_count<x[j+1].sales_count){
                t=x[j+1];
                x[j+1]=x[j];
                x[j]=t;
            }
        }
    }
}

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

 

t5

 

#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2025-06-01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2025-06-01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 a,dan=0,shuang=0;
    if((d.year%4==0&&d.year%100!=0)||d.year%400==0){
        if(d.month==1)
        a=d.day;
        else if(d.month==2)
        a=31+d.day;
        else{
            if(d.month%2==0){
            dan=d.month/2;
            shuang=d.month/2-2;
            a=31*dan+30*shuang+29+d.day;}
            else{
            dan=d.month/2;
            shuang=d.month/2-1;
            a=31*dan+30*shuang+29+d.day;
            }
        }
        
    }
    else{
        if(d.month==1)
        a=d.day;
        else if(d.month==2)
        a=31+d.day;
        else{
            if(d.month%2==0){
            dan=d.month/2;
            shuang=d.month/2-2;
            a=31*dan+30*shuang+28+d.day;}
            else{
            dan=d.month/2;
            shuang=d.month/2-1;
            a=31*dan+30*shuang+28+d.day;
    }
    
}return a;
}
}

int compare_dates(Date d1,Date d2){
    int i,a1,a2;
    a1=day_of_year(d1);
    a2=day_of_year(d2);
    if(d1.year==d2.year){
    if(a1<a2)
    i=-1;
    else if(a1>a2)
    i=1;
    else
    i=0;}
    else{
        if(d1.year<d2.year)
        i=-1;
        else 
        i=1;
    }
    return i;
}

 

t6

 

#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("%-20s",x[i].username);
        for(j=0;j<strlen(x[i].password);++j)
        printf("*");
        printf("\t\t\t");
        switch(x[i].type){
            case (admin):printf("admin\n");break;
            case (student):printf("student\n");break;
            case (teacher):printf("teacher\n");break;
            default:break;
        }
    }
}

 

t7

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

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

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("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,j;
    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 t;
    for(i=0;i<n-1;++i){
        for(j=0;j<n-1-i;++j){
            if(x[j].vip<x[j+1].vip){
            t=x[j];
            x[j]=x[j+1];
            x[j+1]=t;    
            }
            if(x[j].vip==0)
            if(strcmp(x[j].name,x[j+1].name)>0){
                t=x[j];
                x[j]=x[j+1];
                x[j+1]=t;
                }
                
            }
        }
    
    
    for(i=0;i<n;++i){
        printf("%-10s%-15s",x[i].name,x[i].phone);
        if(x[i].vip)
        printf("%5s","*");
        printf("\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");
    }
}