实验6
task 4
#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 书名\t\t\t 作者\t\t 售价\n"); for (i = 0;i < n;i++) printf("%-20s %-30s %-20s %.1f\n", x[i].isbn, x[i].name, x[i].author, x[i].sales_price); } void sort(Book x[], int n) { int i, j; Book t; 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) { t = x[j]; x[j] = x[j + 1]; x[j + 1] = t; } } } } double sales_amount(Book x[], int n) { double total = 0.0; int i; for (i = 0;i < n;i++) total += x[i].sales_price * x[i].sales_count; return total; }
task 5
#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-%02d-%02d", &(pd->year), &(pd->month), &(pd->day)); } int day_of_year(Date d) { int i, total = 0; if ((d.year % 4 == 0 && d.year % 100 != 0) || d.year % 400 == 0) { for (i = 0;i < d.month;i++) { if (i == 2 || i == 4 || i == 6 || i == 7 || i == 9 || i == 11) total += 31; else if (i == 1) total += 29; else if (i == 3 || i == 5 || i == 8 || i == 10) total += 30; } total += d.day; } else { for (i = 0;i < d.month;i++) { if (i == 2 || i == 4 || i == 6 || i == 7 || i == 9 || i == 11) total += 31; else if (i == 1) total += 28; else if (i == 3 || i == 5 || i == 8 || i == 10) total += 30; } total += d.day; } return total; } int compare_dates(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; }
task 6
#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("\t"); switch (x[i].type) { case student:printf("student\n");break; case admin:printf("admin\n");break; case teacher:printf("teacher\n");break; } } }
task 7
#include <stdio.h> #include <string.h> #define N 10 typedef struct { char name[20]; char phone[20]; 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); void sort(Contact x[], int n, int vip_cnt); 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：（按姓名字典升序排列，紧急联系人最先显示）\n"); sort(list, N, vip_cnt); 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(name, x[i].name) == 0) x[i].vip = 1; } } void display(Contact x[], int n) { 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"); } } void sort(Contact x[], int n, int vip_cnt) { int i, j; Contact t; for (i = 0;i < n;i++) { if (x[i].vip) { for (j = 0;j < vip_cnt;j++) { t = x[j]; x[j] = x[i]; x[i] = t; } } } for (i = 0;i < vip_cnt-1;i++) { for (j = 0;j < vip_cnt - 1 - i;j++) { 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 - 3;i++) { for (j = vip_cnt;j < n - 1 - i;j++) { if (strcmp(x[j].name, x[j + 1].name) > 0) { t = x[j]; x[j] = x[j + 1]; x[j + 1] = t; } } } }
