C语言课设学生信息管理系统

全局变量

struct stud

{char name[20];

long num;

int age;

char sex;

int score[3];

char tele[12];

struct stud *next;}

子程序

()函数

功能：创建链表，提示输入学生信息，储存到链表中，录入完成后输入y继续，输入n停止，返回主菜单

()函数

功能：显示当前已经存入链表的信息

()函数

功能：删除链表中学生信息，可按姓名或学号删除

()函数

功能：按学号插入学生信息

()函数

功能：修改链表中学生信息

()函数

功能：查找学生信息，可按学号或姓名查找

()函数

功能：对信息进行排序，可实现分别对三门成绩排序

()函数

功能：将链表中的数据保存到指定文件

()函数

功能：将指定文件中已有的数据读入链表

源程序

#include<>

#include<>

#include<>

#include<>

struct stud

{char name[20];

long num;

int age;

char sex;

int score[3];

char tele[12];

struct stud *next;}

main()

{struct stud *head;

struct stud *creat(void);

void display(struct stud *head);

struct stud *dele(struct stud *head);

struct stud *add(struct stud *head);

struct stud *modify(struct stud *head);

void search(struct stud *head);

void save(struct stud *head);

struct stud *sort(struct stud *head);

void save(struct stud *head);

struct stud *load();

char ch;

head=NULL;

for(;;)

{ clrscr(); /*清屏函数*/

printf(“\n\n\t\tWelcome to student informationmanagement system”);

printf(“\n\n\t********************************************************** ****”); printf(“\n\t\t\t 1: Enter the information”);

printf(“\n\t\t\t 2: List the information”);

printf(“\n\t\t\t 3: Delete the information”);

printf(“\n\t\t\t 4: Add the information”);

printf(“\n\t\t\t 5: Modify the information”);

printf(“\n\t\t\t 6: Search the information”);

printf(“\n\t\t\t 7: Sort the information”);

printf(“\n\t\t\t 8: Save the information”);

printf(“\n\t\t\t 9: Load the information”);

printf(“\n\t\t\t 0: Exit “);

printf(“\n\t\t\t Enter your choice:”);

fflush(stdin);

ch=getchar();

getchar();

switch(ch)

{

case ‘1’: head=creat();

break;

case ‘2’:display(head);

system(“pause”);

break;

case ‘3’:head=dele(head);

system(“pause”);

break;

case ‘4’:head=add(head);

system(“pause”);

break;

case ‘5’:head=modify(head);

system(“pause”);

break;

case ‘6’:search(head);

system(“pause”);

break;

case ‘7’:head=sort(head);

system(“pause”);

break;

case ‘8’:save(head);

system(“pause”);

break;

case ‘9’:head=load();

break;

case ‘0’:

return;

break;

default : clrscr();

printf(“\n\t Error!Please check your input\n\n”);

system(“pause”);

}}

}

struct stud *creat(void) /*链表的创建*/ {struct stud *head,*p1;

char ch;

clrscr();

head=NULL;

p1=(struct stud *)malloc(sizeof(struct stud)); printf(“\t enter name:”);

gets(p1->name); printf(“\t enter number:”);

scanf(“%ld”,&p1->num);

printf(“\t enter age:”);

scanf(“%d”,&p1->age);

printf(“\t enter sex:”);

fflush(stdin);

scanf(“%c”,&p1->sex);

printf(“\t enter Math score:”);

scanf(“%d”,&p1->score[0]);

printf(“\t enter English score:”);

scanf(“%d”,&p1->score[1]);

printf(“\t enter C score:”);

scanf(“%d”,&p1->score[2]);

printf(“\t enter telephone number:”);

fflush(stdin); gets(p1->tele);

head=p1;p1->next=NULL;

do{ printf(“\n\tDO YOU WANT TO CONTINUE Y or N”);

printf(“\n\tEnter your choise:”);

fflush(stdin); ch=getchar(); clrscr(); if(ch==’y’||ch==’Y’)

head=add(head);

else if(ch!=’N’&&ch!=’n’)

{ printf(“\n\tError !Please check your input”);

ch=’y’;}

}while(ch==’y’||ch==’Y’);

return(head);}

struct stud *dele(struct stud *head)/*链表的删除*/

{struct stud *p1,*p2;

int choose;

long delnum;

char name[20];

clrscr();

printf(“\n\t\tChoose the way you want”);

printf(“\n\t 1: According to name\n “);

printf(“\n\t 2: According to num\n”);

printf(“\n\t Enter your choice:”);

scanf(“%d”,&choose);

fflush(stdin);

if(choose==1)

{printf(“\n\t Enter the name:”);

gets(name); if(head==NULL){printf(“\t\nNo information !\n”);return(head);} p1=head; while(strcmp(name,p1->name)!=0&&p1->next!=NULL)

{p2=p1;p1=p1->next;}

if(strcmp(name,p1->name)==0)

{if(p1==head)head=p1->next;

else p2->next=p1->next;

printf(“\t Delete Successed !\n\n”);

}

else printf(“\t Not been find!\n\n”);

return(head);}

else if(choose==2)

{printf(“\n\tEnter the number:”);

scanf(“%ld”,&delnum);

if(head==NULL){printf(“\nNo information !\n”);return(head);} p1=head; while(delnum!=p1->num&&p1->next!=NULL)

{p2=p1;p1=p1->next;}

if(delnum==p1->num)

{if(p1==head)head=p1->next;

else p2->next=p1->next;

printf(“\t Delete Successed !\n\n”);

}

else printf(“\t Not been find!\n”);

return(head);

}

else {printf(“\n\t Error!Please check your input\n\n”);

return(head);}

}

void display(struct stud *head)

{struct stud *p;

p=head;

clrscr();

if(head==NULL)

printf(“\n\t No information\n\n”);

else {printf(“name\tnumber\tage\tsex\tMath\tEnglish\tC\ttelephone number\n”);

do

{

printf(“%s\t%ld\t%d\t%c\t%d\t%d\t%d\t%s\n”,p->name,p->num,p->age,p->sex,p->s core[0],p->score[1],p->score[2],p->tele);

p=p->next;}

while(p!=NULL); }

}

struct stud *add(struct stud *head)/*链表的插入*/

{struct stud *p1,*p2,*p0;

p0=(struct stud *)malloc(sizeof(struct stud));

clrscr();

printf(“\n\t\t Input the information:”);

printf(“\n\t\t name:”);

fflush(stdin);

gets(p0->name);

printf(“\t\t number:”);

scanf(“%ld”,&p0->num);

printf(“\t\t age:”);

scanf(“%d”,&p0->age);

printf(“\t\t sex:”);

fflush(stdin);

scanf(“%c”,&p0->sex);

printf(“\t\t Math score:”);

scanf(“%d”,&p0->score[0]);

printf(“\t\t English score:”);

scanf(“%d”,&p0->score[1]);

printf(“\t\t C score:”);

scanf(“%d”,&p0->score[2]);

printf(“\t\t telephone number:”);

fflush(stdin);

gets(p0->tele);

p1=head;

if(head==NULL)

{head=p0;p0->next=NULL;}

else

{while(p0->num>p1->num)

{p2=p1,

p1=p1->next;}

if(p0->num<=p1->num)

{if(head==p1)head=p0;

else p2->next=p0;

p0->next=p1;}

else{p1->next=p0;p0->next=NULL;}}

return(head);

}

struct stud *modify(struct stud *head)/*链表的修改*/

{struct stud *p1,*p2,*p0;

clrscr();

printf(“\n\tInput the student’s name:”);

p0=(struct stud *)malloc(sizeof(struct stud));

fflush(stdin);

gets(p0->name);

if(head==NULL){printf(“\nNo information !\n\n”);return(head);} p1=head; while(strcmp(p0->name,p1->name)!=0&&p1->next!=NULL)

{p2=p1;p1=p1->next;}

if(strcmp(p0->name,p1->name)==0)

{printf(“name\tnumber\tage\tsex\tMath\tEnglish\tC\ttelephone number\n”);

printf(“%s\t%ld\t%d\t%c\t%d\t%d\t%d\t%s\n”,p1->name,p1->num,p1->age,p1->sex,

p1->score[0],p1->score[1],p1->score[2],p1->tele);

if(p1==head)head=p1->next; else p2->next=p1->next; printf(“\tNew information: number:”); scanf(“%ld”,&p0->num); printf(“\t\t\t age:”); scanf(“%d”,&p0->age); printf(“\t\t\t sex:”); fflush(stdin); scanf(“%c”,&p0->sex); printf(“\t\t\t Math score:”); scanf(“%d”,&p1->score[0]); printf(“\t\t\t English score:”); scanf(“%d”,&p1->score[1]); printf(“\t\t\t C score:”); scanf(“%d”,&p1->score[2]); printf(“\t\t\t telephone number:”); fflush(stdin); gets(p0->tele); p1=head; if(head==NULL)

{head=p0;p0->next=NULL;}

else

{while(p0->num>p1->num)

{p2=p1;

p1=p1->next;}

if(p0->num<=p1->num)

{if(head==p1)head=p0;

else p2->next=p0;

p0->next=p1;}

else{p1->next=p0;p0->next=NULL;}}

printf(“Modify Successed !\n\n”);}

else printf(“Not been find!\n\n”);

return(head);

}

void search(struct stud *head)/*查询链表 */

{struct stud *p;

int choose;

long num;

char name[20];

clrscr();

printf(“\n\t\tChoose the way you want”);

printf(“\n\t 1: According to name\n “);

printf(“\n\t 2: According to num\n”);

printf(“\n\t Enter your choice:”);

scanf(“%d”,&choose);

fflush(stdin);

if(choose==1)

{printf(“\n\t enter the name:”);

gets(name);

if(head==NULL){printf(“\t\nNo information !\n\n”);}

else

{p=head;

while(strcmp(name,p->name)!=0&&p->next!=NULL)

{p=p->next;}

if(strcmp(name,p->name)==0)

{printf(“name\tnumber\tage\tsex\tMath\tEnglish\tC\ttelephone number\n”);

printf(“%s\t%ld\t%d\t%c\t%d\t%d\t%d\t%s\n”,p->name,p->num,p->age,p->sex,p->s core[0],p->score[1],p->score[2],p->tele);

}

else printf(“ Not been find!\n\n”);}}

else if(choose==2)

{printf(“\n\t Enter the number:”);

scanf(“%ld”,&num);

if(head==NULL){printf(“\nNo information!\n”);}

else

{p=head;

while(num!=p->num&&p->next!=NULL)

{p=p->next;}

if(num==p->num)

{printf(“name\tnumber\tage\tsex\tMath\tEnglish\tC\ttelephone number\n”);

printf(“%s\t%ld\t%d\t%c\t%d\t%d\t%d\t%s\n”,p->name,p->num,p->age,p->sex,p->s core[0],p->score[1],p->score[2],p->tele);

}

else printf(“\t Not been find!\n”);}}

else printf(“\n\t Error!Please check your input\n\n”);

}

struct stud *sort(struct stud *head)

{

struct stud *first;

struct stud *t;

struct stud *p;

struct stud *q;

int ch;

clrscr();

printf(“\n\t\tChoose the way you want”);

printf(“\n\t 1: According to Math:\n”);

printf(“\n\t 2: According to English\n”);

printf(“\n\t 3: According to C\n”);

printf(“\n\t Enter your choice:”);

scanf(“%d”,&ch);

first = head->next;

head->next = NULL;

while (first != NULL)

{for (t=first, q=head; ((q!=NULL) && (q->score[ch-1]>t->score[ch-1]));

p=q, q=q->next);

first = first->next;

if (q == head)

head = t;

else

{p->next = t;}

t->next = q;

}

printf(“\n\t\tSuccess !\n”);

return head;

}

void save(struct stud *head) /*保存链表*/

{FILE *fp;

struct stud *p;

char filename[20];

printf(“\n\ninput the filename: “);

fflush(stdin);

gets(filename);

if((fp=fopen(filename,”w”))==NULL)

{printf(“Save file %s error ! Type it again.\n\n”,filename);

exit(0);}

p=head;

while(p!=NULL)

{ fprintf(fp,”%s\t”,p->name);

fprintf(fp,”%ld\t”,p->num);

fprintf(fp,”%d\t”,p->age);

fprintf(fp,”%c\t”,p->sex);

fprintf(fp,”%d\t”,p->score[0]);

fprintf(fp,”%d\t”,p->score[1]);

fprintf(fp,”%d\t”,p->score[2]);

fprintf(fp,”%s\t\n”,p->tele);

p=p->next;

}

printf(“\n\t\tSuccess !\n”);

fclose(fp);

}

struct stud *load() /*链表的导入*/

{FILE *fp;

char filename[20];

struct stud *head,*p1,*p2;

printf(“\n\ninput the filename: “);

fflush(stdin);

gets(filename);

if((fp=fopen(filename,”r”))==NULL)

{printf(“Load file %s error ! Type it again.\n\n”,filename);

exit(0);}

if(!feof(fp))

{head=(struct stud *) malloc(sizeof(struct stud));

fscanf(fp,”%s\t”,&head->name);

fscanf(fp,”%ld\t”,&head->num);

fscanf(fp,”%d\t”,&head->age);

fscanf(fp,”%c\t”,&head->sex);

fscanf(fp,”%d\t”,&head->score[0]);

fscanf(fp,”%d\t”,&head->score[1]);

fscanf(fp,”%d\t”,&head->score[2]);

fscanf(fp,”%s\t\n”,&head->tele);

p2=head;}

while( !feof(fp))

{ p1= (struct stud *) malloc(sizeof(struct stud));

fscanf(fp,”%s\t”,&p1->name);

fscanf(fp,”%ld\t”,&p1->num);

fscanf(fp,”%d\t”,&p1->age);

fscanf(fp,”%c\t”,&p1->sex);

fscanf(fp,”%d\t”,&p1->score[0]);

fscanf(fp,”%d\t”,&p1->score[1]);

fscanf(fp,”%d\t”,&p1->score[2]);

fscanf(fp,”%s\t\n”,&p1->tele);

p2->next=p1;p2=p1; }

p2->next=NULL;

printf(“\n\t\t Success !\n”);

fclose(fp);

return(head);

}

心得体会

这次的课程设计，使我们对C语言有了更近一步的认识和了解，不仅巩固了以前所学过的知识，而且在查阅资料过程中学到了很多书本上学不到的知识。实践中遇到了很多问题，在解决问题的过程中，提高了我们实际的动手能力和分析思考能力。理论知识固然重要，但只有

理论知识是远远不够的，只有理论联系实际，将理论运用到实际中去，才能真真掌握C语言的精髓。

第一次编写这么大型的程序,仅靠一个人的力量是远远不够的,在和组员的合作之中,培养了我们协调与沟通的能力，使我们对软件的开发流程有了更近一步的了解。

参考文献

《C程序设计（第三版）》谭浩强着清华大学出版社

《C语言高级编程及实例剖析》王为清刘变红着人民邮电出版社 -