议题提交：傲雪
信息来源：邪恶八进制信息安全团队
#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <stdlib.h>
#define N sizeof(struct student)
FILE*fp;
struct student
{
char name[20];
char num[10];
char sex;
float mark;
struct student *next;
};
struct student *head=NULL;
/*dummyFunction这个函数是为了避免结构体类型输入时float型连接错误，而特意写的一个函数，此函数没有被任何函数调用，但起到了补丁
的作用*/
void dummyFunction()
{
float dummyFloat;
scanf("%f",&dummyFloat);
printf("%f",dummyFloat);
}
/*这是刚建立學生信息时调用的函数，这也是个基本的功能，相信大家都能实现，被主函数调用*/
struct student *create_message()
{
struct student *p1,*p2;
int i;
int k;
printf("input the student's sum:");
scanf("%d",&k);
head=NULL;
if(k>0) ;
{
head=p1=p2=(struct student *)malloc(N);
printf("input the student's name,cardnum,sex,mark:\n");
scanf("%s %s %s %f",
p1->name,p1->num,&p1->sex,&p1->mark); /*每当有输入或修改學生的信息时，被调用*/
for(i=1;i<k;i++)
{
p1=(struct student *)malloc(N);
fflush(stdin);
scanf("%s %s %s %f",
p1->name,p1->num,&p1->sex,&p1->mark); /*每当有输入或修改學生的信息时，被调用*/
p2->next=p1;
p2=p1;
}
p1->next=NULL;
printf("finish input!");
}
return (head);
}
/*函数功能：输出學生信息*/
struct student *output_message()
{
struct student *p1;
if(head==NULL) return;
else
printf("\nname cardnum sex mark:\n");
p1=head;
do
{
printf("%s %s %s %f\n",
p1->name,p1->num,p1->sex,p1->mark);
p1=p1->next;
}while(p1!=NULL);
printf("press any key!!");
getch();
}
/*函数功能：删除某个或多个學生信息，当然其中必定先要查找的功能，查找又分两种查询方式：1，卡号2，學生名；查找以后再删除，
当然完成这个程序选用的结构是：单链表。所以删除也比较方便，被主函数调用*/
struct student *delete_message()
{
struct student *p1,*p2;
int x;
char del_num[10];
char del_name[20];
char del[10];
char cpy1[10],cpy2[20];
system("cls");
system("cls");
if(head==NULL)
return(NULL);
else
do
{
do
{
system("cls");
printf("input the student's messages:\n" );
printf(" *1.the student's card number\n" );
printf(" *2.the student's name \n" );
printf(" choice the number between 1 and2:");
fflush(stdin);
scanf("%d" ,&x);
switch(x)
{
case 1:printf("input the student's card number:\n" );
fflush(stdin);
scanf("%s" ,del_num);break;
case 2:printf("input student's name:\n" );
fflush(stdin);
scanf("%s%s" ,del_name);break;
}
}while(x!=1&&x!=2);
p2=p1=head;
if(x==1)
while(p1!=NULL) /*寻找和输入信息相同的學生信息*/
{
strcpy(cpy1,p1->num);
if(!strcmp(cpy1,del_num))
{ if(p1==head)
head=p1->next;
else
p2->next=p1->next;
printf("delete successful!\n" ); free(p1);
free(p1);
break;
}
p2=p1;
p1=p1->next;
}
else
while(p1!=NULL)
{
strcpy(cpy2,p1->name);
if(!strcmp(cpy2,del_name))
{ if(p1==head)
head=p1->next;
else
p2->next=p1->next;
printf("delete successful!\n" );
free(p1);
break;
}
p2=p1;
p1=p1->next;
}
if(p1==NULL)
printf("\n donot find it\n\n" );
printf ("are you continues?\n input yes or no:\n");
scanf("%s",del);
}while(!strcmp(del,"yes"));
system("cls");
printf("delete successful!\n please press any key!:\n");
getch ();
return head;
}
/*函数功能：插入學生信息结点。是按卡号字符串的大小的顺序插入的。*/
struct student *insert_message()
{
struct student *p1, *p2,*p;
char answer[5];
char cpy1[10],cpy2[10];
system("cls");
/*fp=fopen("student.txt","wb");
if(head==NULL) return(NULL);
else */
do
{
system("cls");
p=(struct student *)malloc(N);
printf("input name,card number,mark \n");
scanf("%s %s %c %s %s %f %f",
p->name,p->num,&p->sex,&p->mark);
if(head==NULL)
{
head=p;
p->next=NULL;
return ;
}
else
{
p1=p2=head;
strcpy(cpy1,p1->num);
strcpy(cpy2,p->num);
while(strcmp(p1->num,cpy2)<0)
{
p2=p1;
p1=p1->next;
if (p1==NULL)
{
break;
}
strcpy(cpy1,p1->num);
}
if(strcmp(cpy1,cpy2)>=0)
{
if(p1==head)
{
head=p;
p->next=p1;
}
else
{
p2->next=p;
p->next=p1;
}
}
if(p1==NULL)
{
p2->next=p;
p->next=NULL;
}
}
printf("insert successful! are you continues?\n input yes or no:\n");
fflush(stdin);
scanf("%s",answer);
system("cls");
}while(!strcmp(answer,"yes"));
printf("insert successful! please press any key!:\n");
getch ();
return;
}
/*函数功能：查询學生信息。当然也和删除一样，要先找到要查询的學生，然后将其输出。被主函数调用*/
struct student *inquire_message()
{
struct student *p1;
int x;
char cpy1[10],cpy2[20];
char name_[20];
char num_[10];
char answer[5];
system("cls");
printf("input the student's messages:\n");
system("cls");
fp=fopen("student.txt","wb");
if(head==NULL);
else do
{
do
{ system("cls");
printf("choose the inquire form:\n");
printf(" *1.the student's card number \n");
printf(" *2.the student's name \n");
printf(" choice the number between 1 and 2:");
scanf("%d",&x);
switch(x)
{
case 1:printf("input the student's card number:\n");
scanf("%s",num_);break;
case 2:printf("input teacher's name :\n");
scanf("%s",name_);break;
}
}while(x!=1&&x!=2);
p1=head;
if(x==1)
while(p1!=NULL)
{
strcpy(cpy1,p1->num);
if(!strcmp(cpy1,num_))
break;
p1=p1->next;
}
else
while(p1!=NULL)
{
strcpy(cpy2,p1->name);
strcpy(cpy1,p1->part);
if(!strcmp(cpy2,name_))
break;
p1=p1->next;
}
if(p1!=NULL)
{
printf("\n inquire student's messages successful!:\n");
printf("name,card number,mark:\n");
printf("%s %s %s %f",p1->name,p1->num,p1->sex,p1->mark) ;
}
else
printf("\n donot find it\n\n");
printf("are you continues?\n input yes or no:\n");
scanf("%s",answer);
}while(!strcmp(answer,"yes"));
system("cls");
printf (" please press any key!:");
getch ();
return (head);
}
/*函数功能：修改學生信息。当然也先要先找到要修改的學生，然后选择學生的某项信息进行修改，当然修改后要调用那些函数。被主函数调
用*/
struct student *revise_message()
{
struct student *p1, *p2;
int x;
int y;
char cpy1[10],cpy2[20];
char name_[20];
char num_[10];
char answer[5];
system("cls");
printf("input the student's messages:\n");
system("cls");
/*fp=fopen("student.txt","wb");*/
if(head==NULL);
else do
{
do
{ system("cls");
printf("choose the inquire form:\n");
printf(" *1.the student's card number:\n");
printf(" *2.the teacher's name:\n");
printf(" choice the number between 1 and 2:");
scanf("%d",&x);
switch(x)
{
case 1:printf("input the student's card number:\n");
scanf("%s",num_);break;
case 2:printf("input student's name:\n");
scanf("%s",name_);break;
}
}while(x!=1&&x!=2);
p1=head;
if(x==1)
while(p1!=NULL)
{
strcpy(cpy1,p1->num);
if(!strcmp(cpy1,num_))
break;
p1=p1->next;
}
else
while(p1!=NULL)
{
strcpy(cpy2,p1->name);
if(!strcmp(cpy2,name_))
break;
p1=p1->next;
}
if(p1!=NULL)
{
printf("\n find student's messages:");
printf("\n 3.name\n");
printf("\n 4.card number\n");
printf("\n 5.mark\n");
printf("\n choose the number between 3 and 4:\n");
scanf("%d",&y);
switch(y)
{
case 3:printf("revise name:\n");
scanf("%s",p1->name);break;
case 4:printf("revise number:\n");
scanf("%s",p1->num);break;
case 5:printf("revise mark:\n");
scanf("%f",p1->mark);break;
} /*每当有输入或修改學生的信息时，被调用*/
printf("\n reviser successful! \n") ;
}
else printf("\n donot find it\n\n");
printf ("are you continues?input yes or no:\n");
scanf("%s",answer);
}while(!strcmp(answer,"yes"));
system("cls");
printf (" please press any key!:\n");
getch ();
return head;
}
/*函数的功能：将员工的信息保存到硬盘。每当将退出系统的时候调用*/
save_message()
{
struct student *p1=head;
clrscr();
fp=fopen("student.txt","wb");
if(fp==NULL)
{
printf("building fail!\n ");
getch();
return;
}
while(p1!=NULL)
{
if(fwrite(p1,sizeof(struct student),1,fp)!=1)
{
printf("write wrong!\n");
return;
}
p1=p1->next;
}
fclose(fp);
printf("save successful!\n press any key!:\n");
getch();
}
/*函数功能：将學生信息从硬盘中读取出来。这个上面函数正好是个互补的过程，每当系统刚启动的时候被调用*/
openfile()
{
struct student *p1, *p2;
int n=1;
if((fp=fopen("student.txt","rb"))==NULL)
{
printf("donot have the student's messages!\n press any key:\n");
getch();
return(NULL);
}
p1=p2=(struct student *)malloc(N);
if(p1==NULL)
{
printf("the room donot enough!!\n press any key:\n");
getch();
return(NULL);
}
if(fread(p1,sizeof(struct student),1,fp)!=1)
{
printf("please create the student's date before!!\n press any key :\n");
getch();
return(NULL);
}
if(p1->next==NULL) head=p1;
else
{ do
{
if(n==1) head=p1;
else p2->next=p1;
n=n+1;
p2=p1;
if((p1=(struct student*)malloc(N))==NULL)
{
printf("the room donot enough!!\n press any key:\n");
getch();
return(NULL);
}
if(fread(p1,sizeof(struct student),1,fp)!=1)
{
printf("out put the messages fail!!\n press any key:\n");
getch();
return(NULL);
}
}while(p1->next!=NULL);
p2->next =p1;
}
fclose(fp);
return(NULL);
}
/*主函数*/
main()
{
int choice;
system("cls");
openfile();/*调用读取學生信息函数，如果硬盘里面没有存储信息，它将提示你建立學生信息*/
do
{/*菜单选项：建立信息，输出信息，删除信息，插入信息，查询信息，修改信息*/
printf("\n\n ****jiaoshigongziguanlixitong****\n\n");
printf(" 1.create student's message\n\n");
printf(" 2.output student's message\n\n");
printf(" 3.delete student's message\n\n");
printf(" 4.insert student's message\n\n");
printf(" 5.inquire student's message\n\n");
printf(" 6.revise student's message\n\n");
printf(" 0.exit system\n");
printf(" choice the number between 0 and 6:");
fflush(stdin);
scanf("%d", &choice);
switch(choice)
{
case 1: create_message();break;
case 2: output_message();break;
case 3: delete_message();break;
case 4: insert_message();break;
case 5: inquire_message();break;
case 6: revise_message();break;
case 0: break;
}
}while(choice!=0);
save_message();/*存储學生信息函数被调用*/
printf("\n jiaoshigongziyichucong!\n");
}
