课程设计-(c语言)学生成绩管理系统.doc

Four short words sum up what has lifted most successful individuals above the crowd: a little bit more.-author-date课程设计-(c语言)学生成绩管理系统课程设计-(c语言)学生成绩管理系统湖北师范学院 信息工程<1203>班 朱文峰完整程序# include <stdio.h> # include <stdlib.h> # include <string.h> typedef struct student char num10; /学号char name10; /姓名int chinese; int math; int english; int computer;int total; /总分float ave; /平均分STU;/单链表实现typedef struct node struct student data; /数据域struct node * next; /指针域 NODE, * PNODE; /主菜单void menu1() printf("n * 欢迎进入学生成绩管理系统 *nn");printf(" 湖北师范学院 信工<1203>班nn");void menu2()printf(" *nn");printf(" 1 增加数据 2 删除数据 n");printf(" 3 查找信息 4 修改信息 n");printf(" 5 顺序显示 6 统计数据nn");printf(" *n");/保存学生信息void save(PNODE list)FILE *fp;NODE *p;fp = fopen("student", "wb");/只写方式打开二进制文件if(fp = NULL) printf("n文件操作错误n");return ;p = list -> next;while(p)if(fwrite(p,sizeof(NODE),1,fp) = 1) p = p -> next;elsebreak;fclose(fp); /增加学生信息void add(PNODE list)NODE *p, *r, *s; char flag = 0, num10, name10;int a,b,c,d;/各门成绩char ch;r = list;while(r -> next != NULL)r = r -> next;/将指针移到链表末尾while(1)while(1) printf("n 请依次输入学号，姓名，语文,数学,英语,计算机的成绩,用空格隔开:n");printf(" ");scanf("%s%s%d%d%d%d",num,name,&a,&b,&c,&d); flag = 0;s = list -> next;while(s)/检查该学号是否已经存在if(strcmp(s -> data.num, num) = 0)flag = 1;break;s = s -> next;if(1 = flag) printf(" 您输入的学号已存在，请重新输入:");continue;break;p = (PNODE)malloc(sizeof(NODE); if(!p)printf("内存错误n"); return ; strcpy(p -> data.num, num);strcpy(p -> data.name, name); p -> data.chinese = a;p -> data.math = b;p -> data.english = c;p -> puter = d;p -> data.total = a + b + c + d;p -> data.ave = (a + b + c + d) / 4.0;p -> next = NULL; r -> next = p; /将新结点挂在尾结点后面r = p;save(list);printf(" 保存成功! 是否继续操作?<y/n>: ");getchar();scanf("%c", &ch);if(ch = 'y' | ch = 'Y')continue;elsereturn;/打印某个学生的信息void pri(NODE *r)printf(" 学号 姓名 语文 数学 英语 计算机 平均分 总分n");printf(" %-7s%5s%4d%5d%5d%6d%9.2f%5dn",r->data.num, r->data.name, r->data.chinese, r->data.math,r->data.english, r->puter, r->data.ave, r->data.total);/遍历链表void traverse(PNODE list)PNODE p;p = list -> next;printf(" 学号 姓名 语文 数学 英语 计算机 平均分 总分n");while(p != NULL)printf(" %-7s%5s%4d%5d%5d%6d%9.2f%5dn",p->data.num, p->data.name, p->data.chinese, p->data.math,p->data.english, p->puter, p->data.ave, p->data.total);p = p -> next;return ;/按学号排序学生信息并显示void dis(PNODE list)char ch;PNODE p, r;STU stu;if(!list -> next)printf(" 没有可用数据!n");return ;for(p = list -> next; p -> next != NULL; p = p -> next)for(r = p -> next; r != NULL; r = r -> next)if(strcmp(p->data.num, r->data.num) > 0)stu = p -> data;p -> data = r -> data;r -> data = stu;printf(" -n");traverse(list);printf(" -n");printf(" 是否返回继续操作?<y/n>: ");getchar();scanf("%c", &ch);if(ch = 'y' | ch = 'Y')return;elseexit(0);/查找学生信息void find(PNODE list)char num10, ch;NODE *r;int f = 0;while(1)r = list -> next;printf(" 请输入学号或姓名: ");scanf("%s", num);while(r)if(strcmp(r -> data.num, num) = 0) f = 1;pri(r);break;else if(strcmp(r -> data.name, num) = 0) f = 1;pri(r);r = r -> next;if(!f)printf(" 没有找到对应信息!n");printf(" 是否继续操作?<y/n>: ");getchar();scanf("%c", &ch);if(ch = 'y' | ch = 'Y')continue;elsereturn;/删除学生数据void del(PNODE list)while(1)PNODE r, p;char num10, ch;printf(" 请输入学号或姓名: ");scanf("%s", num);r = list -> next;p = list;while(r)if(strcmp(r -> data.num, num) = 0 | strcmp(r -> data.name, num) = 0)while(p -> next != r)p = p -> next;p -> next = r -> next;r = r -> next;printf(" 删除成功!是否继续执行删除?<y/n>: ");save(list);getchar();scanf("%c", &ch);if(ch = 'y' | ch = 'Y')continue;elsereturn;/修改学生信息void modi(PNODE list)while(1)PNODE r;int a, b, c, d;char num10, ch;printf(" 请输入学号或姓名: ");scanf("%s", num);r = list -> next;while(r)if(strcmp(r -> data.num, num) = 0 | strcmp(r -> data.name, num) = 0)pri(r);printf(" 请依次输入各门成绩:");scanf("%d%d%d%d", &a, &b, &c, &d);r -> data.chinese = a;r -> data.math = b;r -> data.english = c;r -> puter = d;r = r -> next;printf(" 修改成功!是否继续修改?<y/n>: ");save(list);getchar();scanf("%c", &ch);if(ch = 'y' | ch = 'Y')continue;elsereturn;/平均分排序，不及格学生课程显示/各门成绩最高分,最低分,平均分void sta(PNODE list)PNODE p, r;STU stu;char ch;int f = 0, count = 0;int ave_ch = 0, ave_ma = 0, ave_en = 0, ave_co = 0;int max_ch, max_ma, max_en, max_co;int min_ch, min_ma, min_en, min_co;char name_max_ch10, name_max_ma10, name_max_en10, name_max_co10;char name_min_ch10, name_min_ma10, name_min_en10, name_min_co10;if(!list -> next)printf(" 没有可用数据!n");return ;for(p = list -> next; p -> next != NULL; p = p -> next)for(r = p -> next; r != NULL; r = r -> next)if(p->data.ave < r->data.ave)stu = p -> data;p -> data = r -> data;r -> data = stu;printf("n 按平均分排名为: n");printf(" -n");traverse(list);printf(" -nn");/不及格统计p = list -> next;while(p)if(p->data.chinese <= 60)f = 1;printf(" 语文不及格的同学为: n");printf(" -n");printf("");printf("%s %dn", p->data.name, p->data.chinese);if(p->data.math <= 60)f = 1;printf("n 数学不及格的同学为: n");printf(" -n");printf("");printf("%s %dn", p->data.name, p->data.math);if(p->data.english <= 60)f = 1;printf("n 英语不及格的同学为: n");printf(" -n");printf("");printf("%s %dn", p->data.name, p->data.english);if(p->puter <= 60)f = 1;printf("n 计算机不及格的同学为: n");printf(" -n");printf("");printf("%s %dn", p->data.name, p->puter);p = p -> next;count +;if(!f)printf(" 全部及格n");printf("n");/各门成绩平均分p = list -> next;while(p)ave_ch = ave_ch + p->data.chinese / count;ave_ma = ave_ma + p->data.math / count;ave_en = ave_en + p->data.english / count;ave_co = ave_co + p->puter / count;p = p -> next;printf(" 各科平均分为:n");printf(" -n");printf(" 语文 数学 英语 计算机n");printf(" %d %d %d %dn", ave_ch, ave_ma, ave_en, ave_co);/各门成绩最高分,最低分p = list -> next;max_ch = min_ch = p->data.chinese;max_ma = min_ma = p->data.math;max_en = min_en = p->data.english;max_co = min_co = p->puter;strcpy(name_max_ch, p->data.name);strcpy(name_max_ma, p->data.name);strcpy(name_max_en, p->data.name);strcpy(name_max_co, p->data.name);strcpy(name_min_ch, p->data.name);strcpy(name_min_ma, p->data.name);strcpy(name_min_en, p->data.name);strcpy(name_min_co, p->data.name);while(p)if(p->data.chinese > max_ch)max_ch = p->data.chinese;strcpy(name_max_ch, p->data.name);if(p->data.chinese < min_ch)min_ch = p->data.chinese;strcpy(name_min_ch, p->data.name);if(p->data.math > max_ma)max_ma = p->data.math;strcpy(name_max_ma, p->data.name);if(p->data.math < min_ma)min_ma = p->data.math;strcpy(name_min_ma, p->data.name);if(p->data.english > max_en)max_en = p->data.english;strcpy(name_max_en, p->data.name);if(p->data.english < min_en)min_en = p->data.english;strcpy(name_min_en, p->data.name);if(p->puter > max_co)max_co = p->puter;strcpy(name_max_co, p->data.name);if(p->data.chinese < min_ch)min_co = p->puter;strcpy(name_min_co, p->data.name);p = p -> next;printf("n 各门成绩最高分,最低分:n");printf(" -n");printf(" 最高分 最低分n");printf(" 语文: ");printf("%s %d %s %dn",name_max_ch, max_ch, name_min_ch, min_ch);printf(" 数学: ");printf("%s %d %s %dn",name_max_ma, max_ma, name_min_ma, min_ma);printf(" 英语: ");printf("%s %d %s %dn",name_max_en, max_en, name_min_en, min_en);printf(" 计算机: ");printf("%s %d %s %dn",name_max_co, max_co, name_min_co, min_co);printf(" -n");printf("nn 是否继续操作?<y/n>: ");getchar();scanf("%c", &ch);if(ch = 'y' | ch = 'Y')return;elseexit(0);/主函数void main()PNODE list; /定义链表FILE *fp; int s; /选择变量int count = 0;/结点个数 NODE *p, *r; list = (PNODE)malloc(sizeof(NODE); if(!list) printf("内存出错!n"); exit(0); list -> next = NULL;r = list; fp = fopen("student","ab+"); /可读可写,文件不存在则创建文件 if(fp = NULL)printf("n文件出错n");exit(0);while(!feof(fp)/如果没有到文件尾p = (PNODE)malloc(sizeof(NODE);if(!p)printf("内存出错!n"); exit(0); if(fread(p,sizeof(NODE),1,fp) = 1)p -> next = NULL;r -> next = p;r = p; count +;fclose(fp); menu1();printf("n 文件打开成功，已有%d个记录n", count);while(1)menu2();printf("n 请选择对应操作<1-6>:"); scanf("%d", &s);switch(s)case 1:add(list); break; /增加case 2:del(list); break; /删除case 3:find(list);break; /查询 case 4:modi(list); break; /修改case 5:dis(list); break; /显示case 6:sta(list); break;/统计default: printf("n您的输入有误，请重新输入:n"); break; -