实验六
任务四
#include <stdio.h> #include<stdlib.h> #define N 10 typedef struct { char isbn[20]; // isbn号 char name[80]; // 书名 char author[80]; // 作者 double sales_price; // 售价 int sales_count; // 销售册数 } 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)); system("pause"); return 0; } void output(Book x[], int n){ int i=0; printf("%-20s%-30s%-20s%-10s%-10s","ISBN号","书名","作者","售价","销售册数\n"); for(i = 0;i<n;i++){ printf("%-20s%-30s%-20s%-10.1lf%-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 b=0,i = 0; Book t; for(b=0;b<n;b++){ for(i=0;i<n-1;i++){ if(x[i].sales_count<x[i+1].sales_count){ t = x[i]; x[i] = x[i+1]; x[i+1] = t; } } } } double sales_amount(Book x[], int n){ double sum = 0; int i=0; for(i=0;i<n;i++){ sum += x[i].sales_count * x[i].sales_price; } return sum; }
任务五
#include <stdio.h> #include<stdlib.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(); system("pause"); return 0; } void input(Date *pd) { char a='-',b='-'; scanf("%d %c %d %c %d",&pd->year,&a,&pd->month,&b,&pd->day); } int day_of_year(Date d) { int sum = 0,b; b = d.month - 1; sum = (d.month-1)*30+d.day; if(d.year%4==0){ while(b!=0){ if(b%2!=0){ sum++; } b--; } if(d.month>2){ sum--; } } else{ while(b!=0){ if(b%2!=0){ sum++; } b--; } if(d.month>2){ sum-=2; } } return sum; } int compare_dates(Date d1, Date d2) { if(d1.year<d2.year){ return -1; } if(d1.year>d2.year){ return 1; } if(d1.year==d2.year){ if(d1.month<d2.month){ return -1; } if(d1.month>d2.month){ return 1; } if(d1.month==d2.month){ if(d1.day<d2.day){ return -1; } if(d1.day>d2.day){ return 1; } if(d1.day==d2.day){ return 0; } } } }
任务六
#include<stdlib.h> #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); system("pause"); return 0; } void output(Account x[], int n) { int i=0,b=0,k=0; for(i=0;i<n;i++){ printf("%-30s",x[i].username); b = strlen(x[i].password); for(k=0;k<b;k++){ printf("*"); } for(k=b;k<20;k++){ printf(" "); } switch(x[i].type){ case 0: printf("admin\n"); break; case 1: printf("student\n"); break; default: printf("teacher\n"); break; } } }
任务七
#include<stdlib.h> #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); void sort(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); system("pause"); return 0; } void set_vip_contact(Contact x[], int n, char name[]) { int i=0; for(i=0;i<n;i++){ if(strcmp(x[i].name,name) == 0){ x[i].vip = 1; } } } void display(Contact x[], int n) { sort(x,n); int i=0; for(i=0;i<n;i++){ if(x[i].vip == 1){ printf("%-10s%-30s*\n",x[i].name,x[i].phone); } } for(i=0;i<n;i++){ if(x[i].vip == 0){ printf("%-10s%-30s\n",x[i].name,x[i].phone); } } } 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){ Contact t; int i=0,b=0; for(i=0;i<n;i++){ for(b=0;b<n-1;b++){ if(strcmp(x[b].name,x[b+1].name)>0){ t = x[b]; x[b] = x[b+1]; x[b+1] = t; } } }
