实验六
#include <stdio.h> #include <string.h> #define N 2 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("\n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-1; 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; } }
#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; }
#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; } }
#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; } }
#include <stdio.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)); return 0; } void output(Book x[],int n){ printf("ISBN号 书名 作者 售价 销售册数\n"); int i; for(i=0;i<n;i++){ printf("%-20s %-26s %-18s %-16.2f %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-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 sum=0; int i; for(i=0;i<n;++i){ sum+=x[i].sales_count*x[i].sales_price; } return sum; } // ×××
#include <stdio.h> typedef struct { int year; int month; int day; } Date; // 函数声明 void input(Date *pd); // 输入日期给pd指向的Date变量 int day_of_year(Date d); // 返回日期d是这一年的第多少天 int compare_dates(Date d1, Date d2); // 比较两个日期: // 如果d1在d2之前,返回-1; // 如果d1在d2之后,返回1 // 如果d1和d2相同,返回0 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(); } // 补足函数input实现 // 功能: 输入日期给pd指向的Date变量 void input(Date *pd) { scanf("%d-%d-%d",&pd->year,&pd->month,&pd->day); } // 补足函数day_of_year实现 // 功能:返回日期d是这一年的第多少天 int day_of_year(Date d) { int days; int day_of_month[]={31,28,31,30,31,30,31,31,30,31,30,31}; if(d.month==1){ days=d.day; } else if(d.month==2){ days=d.day+31; } else{ int i; if((d.year%4==0&&d.year%100!=0)||(d.year%400==0)){ for(i=0;i<(d.month-1);i++){ days+=day_of_month[i]; } days+=d.day+1; } else{ for(i=0;i<(d.month-1);i++){ days+=day_of_month[i]; } days+=d.day; } } return days; } // 补足函数compare_dates实现 // 功能:比较两个日期: // 如果d1在d2之前,返回-1; // 如果d1在d2之后,返回1 // 如果d1和d2相同,返回0 int compare_dates(Date d1, Date d2) { if(d1.year==d2.year){ if(d1.month>d2.month) return 1; else if(d1.month<d2.month) return -1; else{ if(d1.day>d2.day) return 1; else if(d1.day<d2.day) return -1; else return 0; } } else if(d1.year>d2.year) return 1; else return -1; }
#include <stdio.h> #include <string.h> enum Role {admin, student, teacher}; typedef struct { char username[20]; // 用户名 char password[20]; // 密码 enum Role type; // 账户类型 } Account; // 函数声明 void output(Account x[], int n); // 输出账户数组x中n个账户信息,其中,密码用*替代显示 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; } // 待补足的函数output()实现 // 功能:遍历输出账户数组x中n个账户信息 // 显示时,密码字段以与原密码相同字段长度的*替代显示 void output(Account x[], int n) { int i,j; for(i=0;i<n;++i){ printf("%-10s",x[i].username); for(j=0;j<(int)strlen(x[i].password);++j){ printf("*"); } printf("\t"); if(x[i].type==student) printf("student\n"); else if(x[i].type==admin) printf("admin\n"); else printf("teacher\n"); } }
#include <stdio.h> #include <string.h> typedef struct { char name[20]; // 姓名 char phone[12]; // 手机号 int vip; // 是否为紧急联系人,是取1;否则取0 } Contact; // 函数声明 void set_vip_contact(Contact x[], int n, char name[]); // 设置紧急联系人 void output(Contact x[], int n); // 输出x中联系人信息 void display(Contact x[], int n); // 按联系人姓名字典序升序显示信息,紧急联系人最先显示 #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; } // 补足函数set_vip_contact实现 // 功能:将联系人数组x中,联系人姓名与name一样的人,设置为紧急联系人(即成员vip值设为1) void set_vip_contact(Contact x[], int n, char name[]) { int i; for(i=0;i<n;++i){ if((int)strcmp(x[i].name,name)==0){ x[i].vip=1; } } } // 补足函数display实现 // 功能: 显示联系人数组x中的联系人信息 // 按姓名字典序升序显示, 紧急联系人显示在最前面 void display(Contact x[], int n) { Contact temp; int i,j; for(i=0;i<n-1;++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; } else if(x[j].vip==x[j+1].vip&&strcmp(x[j].name,x[j+1].name)>0){ 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"); } }