C语言之学生管理系统

1、流程图: *C：Uwn和、UiftD 刖 l(tcpDrwNDdMgEbu9Ew通信工桎&业学牛信您住陀系绒I或入夕生仿11 沏？a学仝仏1 住呦字牛信 一一刨险牛主伫 悔谀仔生们gft牛9 “紅请按1腐喘V严2 CUwnb1n名京号nw AM虫*“张三！12 irotfrs56.000000 * *CUunVJMJlftXD聖ktopDruAbugztw we*宙入蛍的适抒3Tml 学学牛牛今 人?aifil総改厚出 就測ffVJHHiu年龄 ttw 地址56. OQOOOO * C UwnVHllftDe$lctpDHnDcbu9Dcwcnce, X 入 0C#4 ; . 小1 .几丨Vi

2、ta 2H価谥检0 1诸输入爲的曲入的1号14i学号性81Ait说1媒三11295律見报忡臭56.000000血学W!ft 1请後入您的AH2诂娥入学的外名歩河乍号年龄ttW地址成Mtw5664、会扑扮畔晌少0愉80 000000按牛耳肖wwTi按Ift名f“（谄按2耽力t 0 13请奪人SfcG材il的挙 谓送卄您羁惱曲lb诽M. Z诵橫IIth汕村5，:.出为C4t.fi诂民：-5：汁 诂坚入刃伴弭 讥1丄胖.：，！；负门的戈；闹拓 ； Q 劃阳丁左仁# nrt7i.ni! 址出* n程序源码：#in elude #in elude #in elude #in elude #in elud

3、e#define LENsizeof(structstudent)求字节数运算符struet stude ntehar name20;long int num;ehar sex4;int age;ehar address30;float seore;struetstudent *next;/链表;/定义一个结构题int TOTAL_NUM 0;/ 学生总数struet student *head = NULL;void mainmenu ();/ 主界面void reeord (); / 记录数据void insert(struet student *stu); / 插入数据void disp

4、lay(struet student *stu); / 显示一个学生的信息void displayAll (); /显示所有学生的信息void query(); /查询学生信息void query_by_num(); /按学号查询学生信息void query_by_name();void readData (); /读取文件里学生的信息void writeData (); / 向文件写入学生信息void freeAll (); / 清空链表内容void del (); / 删除学生信息void change (); / 更改学生信息void sort();/ 排序void devise (st

5、ruct student *p); / 选择更改内容int main (void) mainmenu(); return 0;/ 系统主菜单void mainmenu ()int choice;choice = -1;readData ();printf (tttn);|n);才可正常运行 n);printf (ttt| 欢迎使用通信工程专业学生信息管理系统printf (tttn);printf (ttt本程序需要在当前目录下建立 student.txtdoprintf(nnn);printf(tttn);printf(ttt通信工程专业学生信息管理系统printf(tttn);printf

6、(ttt1- 录入学生信息|n);printf(ttt2- 浏览学生信息|n);printf(ttt3- 查询学生信息|n);printf(ttt4- 删除学生信息|n);printf(ttt5- 修改学生信息|n);printf(ttt6- 排序 |n);printf(ttt0- 退出系统 |n);printf(tttn);printf( 请输入您的选择 );|n);scanf (%d, &choice);switch (choice)case 0:writeData ();freeAll (); exit (0);case 1:record ();break;case 2:displayA

7、ll ();break;case 3:query ();break;case 4:del ();break;case 5:change ();break;case 6:sort ();break;default:printf (n 无效选项 !);break;while (choice != 0);/ 录入学生信息void record ()struct student *p0;p0 = (struct student *)malloc(LEN);printf(ttt请输入学生的姓名 :);scanf (%s,p0-name);printf(ttt请输入学生的学号 :);scanf (%ld,

8、&p0-num);printf(ttt请输入学生的性别 :);scanf (%s,p0-sex);printf(ttt请输入学生的年龄 :);scanf (%d,&p0-age);printf(ttt请输入学生的地址 :);scanf (%s,p0-address);printf(ttt请输入学生的成绩 :);scanf (%f,&p0-score);insert (p0);printf (ttt 该学生的信息为 :n);printf (ttt成绩 n);n);printf (ttt 姓名t学号tt 年龄t性别t地址tt display (p0);void insert (struct stu

9、dent *stu)struct student *p0, *p1, *p2;p1 = head;p0 = stu;if (head = NULL)head = p0;p0-next = NULL;elsewhile (p0-num p1-num)&(p1-next != NULL)p2 = p1;p1 = p1-next;if (p0-num num)if (head = p1)head = p0;elsep2-next = p0; p0-next = p1;elsep1-next = p0;p0-next = NULL;TOTAL_NUM+;void display (struct stu

10、dent *p)p-sex,p-addprintf (ttt%st%ldtt%dt%st%stt%fn, p-name, p-num, p-age, ress, p-score);/ 浏览学生信息void displayAll()struct student *p;printf(ttt 学生总数 :%dn, TOTAL_NUM);p = head;if (head != NULL)printf(ttt姓名t学号tt 年龄t性别t地址tt 成绩n);printf(tttn);dodisplay(p); p = p-next;while(p != NULL);printf (n);void que

11、ry()int choice;choice = -1;doprin tf(n);printf(”n);prin tf(|按学号查询请按1|n);printf(|按姓名查询请按2|n);printf(|取消请按0|n);printf(+n);printf(请输入您的选择);scan f(%d,& choice);switch(choice)case 0:return;case 1:query_by_ nu m();break;case 2:query_by_name();break;default:printf(n无效选项!);break;while(choice != 0);/按姓名查询学生信

12、息void query_by_name()char name20;struct student *p1;prin tf(请输入学生的姓名);sca nf(%s,n ame);if(head=NULL)pri ntf( 无学生记录 n);return;p仁head;while(strcmp(name,p1-name) &p1-next!=NULL)p1=p1- n ext;if(!strcmp (n ame,p1- n ame)成绩n);printf(ttt姓名t学号tt 年龄t性别t地址ttprintf(tttn);display(pl);elseprintf(没有该学生记录请核对 :/按学号

13、查询学生信息void query_by_num ()int num;struct student *p1;printf(请输入学生的学号);scan f(%ld,&n um);if(head=NULL)printf( 无学生记录n);return;p1 = head;while (num!=p1-num &p1-next!=NULL)p1 = p1- n ext;if (num =p1-num)成绩n);printf (ttt 姓名t学号tt 年龄t性别t地址ttprintf(tttn);display (p1);elseprintf (ttt没有该学生记录请核对);/写入文件void wri

14、teData ()FILE* fp;/文件指针struct student *p;fp = fope n(1.txt,w);if (!fp)printf(文件打开错误:return;fprin tf(fp,%dn,TOTAL_NUM);for(p = head; p!= NULL; p= p-next)fprintf(fp,%st%ldt%st%dt%st%fn, p-name, p-num, p-sex, p-age, p-address , p-score);fclose (fp);void freeAll ()struct student *p1, *p2;p1 = p2=head;wh

15、ile(p1)p2=p1-next;free (p1);p1 = p2;/ 读取文件void readData ()FILE* fp;/ 文件指针struct student *p1, *p2;fp = fopen(student.txt, r);if (!fp)printf( 文件打开错误 );return;fscanf(fp,%dn, &TOTAL_NUM);head = p1 = p2 = (struct student *)malloc(LEN);fscanf(fp,%st%ldt%st%dt%st%fn, p1-name, &p1-num, p1-sex,&p1-age, p1add

16、ress, &p1-score);while(!feof(fp)p1 = (struct student *)malloc(LEN);fscanf(fp,%st%ldt%st%dt%st%fn, p1-name, &p1-num, p1-sex, &p1-age, p1address, &p1-score);p2-next = p1;p2 = p1;p2-next = NULL;fclose(fp);/ 删除学生信息void del ()struct student *p1, *p2;long int num;if (head = NULL)printf(”无学生记录n);return;pri

17、n tf(请输入您要删除的学生的学号);sca nf(%ld,&n um);p1 = head;while (num != p1-num &p1-next != NULL)p2 = p1;p1 = p1- n ext;if(num =p1- num)if(p1 = head)head = p1- n ext;elsep2-next = p1- n ext;free(p1);TOTAL_NUM-;elseprintf(”没有该学生记录请核对n);void sort() /排序模块。将学生记录按学号从小到大排列。用起泡排序算法实现int i;struct student *ptr,*s=head,

18、*p;int count=0,count1;while(s)/统计链表结点个数coun t+;s=s-n ext;for( i=1;inext&(count1-)if(ptr-scoreptr-next-score)s=ptr-next; ptr-next=s-next;if(p=NULL) /ptr 处于队头时 head=s;elsep-next=s; s-next=ptr; p=s;elseptr=ptr-next;if(p=NULL) /ptr 处于队头时 p=head;else p=p-next;displayAll (); return;void change ()struct student *p1, *p2;long int num;if (head = NULL)printf ( 无学生记录 n);return;printf ( 请输入您要修改的学生的学号 ); scanf (%ld, &num);p1 = head;while (num != p1-num & p1-next != NULL) p2 = p1;p1 = p1-next;if(num = p1-num)devise (p1);elseprintf( 没有该学生记录请核对 n); void devise (struct stude