This article comes from Designer handbags.Computer technology .
#include<stdio.h>
#include<stdlib.h>
int N1,N2,kk1,kk2,kk3;
struct couse * head1;
struct student * head2;
Struct couse//course information structure
{
int num1;
char name1[20];
int score;
Int nelepeo;//course number has been selected
Int Melepeo;//maximum number of courses
struct couse * next;
};
Struct student//student information structure
{
int num2;
char name2[20];
Int nelenum [50];//the selected course number
Int nelen;//number of the selected courses
struct student * next;
};
void Ms()
{
for(kk1=0;kk1<1100;kk1++)
for(kk2=0;kk2<1200;kk2++)
for(kk3=0;kk3<1200;kk3++);
}
Void keyboardc ()//entry course child function (from keyboard input)
{
struct couse *p1,*p2;
N1=0;
p1=p2=(struct couse*)malloc(sizeof(struct couse));
Printf ("course number \t course name \t the maximum number of course credit \t \n");
scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo);
p1->nelepeo=0;
head1=NULL;
while(p1->num1!=0)
{
N1=N1+1;
if(N1==1)head1=p1;
else p2->next=p1;
p2=p1;
p1=(struct couse * )malloc(sizeof(struct couse));
scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo);
p1->nelepeo=0;
}
p2->next=NULL;
}
Void filec ()//input keyboard sub function (from file input)
{
FILE * fp;
char filepath[20];
struct couse *p1,*p2;
N1=0;
Printf ("enter the file path you want to read:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"r"))==NULL)
{
Printf ("couldn't find the file% s! \n", filepath);
exit(0);
}
p1=p2=(struct couse*)malloc(sizeof(struct couse));
fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo);
head1=NULL;
while(!feof(fp))
{
N1=N1+1;
if(N1==1)head1=p1;
else p2->next=p1;
p2=p1;
p1=(struct couse * )malloc(sizeof(struct couse));
fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo);
}
p2->next=NULL;
}
Void inputc ()//entry course main function
{
int i;
Printf ("\t\t\t entry course information \n");
Printf ("\n from keyboard input \n1.");
Printf ("input from file 2. \n");
Printf ("return to the main menu 3. \n");
Printf ("Please select (1 ~ 3): \n");
scanf("%d",&i);
switch(i)
{
case(1):keyboardc();break;
case(2):filec();break;
case(3):break;
}
}
Void insertc (struct couse * incouse)//course management sub function (additional courses)
{
struct couse *p0,*p1,*p2;
p1=head1;
p0=incouse;
if(head1==NULL)
{
head1=p0;
p0->next=NULL;
}
else
{
while((p0->num1 > p1->num1) && (p1->next!=NULL))
{
p2=p1;
p1=p1->next;
}
if(p0->num1 <= p1->num1)
{
if(head1==p1) head1=p0;
else p2->next=p0;
p0->next=p1;
}
else
{
p1->next=p0;
p0->next=NULL;
}
}
N1=N1+1;
}
Void delc (int num1)//course management sub function (remove courses)
{
struct couse *p1,*p2;
if(head1==NULL)
{
Printf ("\n no course, could not be deleted! \n");
goto end;
}
p1=head1;
while(num1!=p1->num1 && p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(num1==p1->num1)
{
if(p1==head1) head1=p1->next;
else p2->next=p1->next;
Printf ("the number of courses has been deleted! \n");
N1=N1-1;
}
Else printf ("not the number of courses! \n");
end:;
}
Void managementc ()//course management main function
{
struct couse * incouse;
int i,num1;
Printf ("\t\t\t course management \n");
Printf ("\n 1. Add new courses");
Printf ("\n delete course 2.");
Printf ("return to the main menu 3. \n");
Printf ("Please select (1 ~ 3): \n");
scanf("%d",&i);
switch(i)
{
case(1):
{
incouse=(struct couse *)malloc(sizeof(struct couse));
Printf ("course number \t course name \t the maximum number of course credit \t \n");
scanf("%d%s%d%d",&incouse->num1,incouse->name1,&incouse->score,&incouse->Melepeo);
incouse->nelepeo=0;
insertc(incouse);
break;
}
case(2):
{
Printf ("enter the number you want to delete courses: \n");
scanf("%d",&num1);
delc(num1);
break;
}
case(3):break;
}
}
Void keyboards ()//entry student information the child function (from keyboard input)
{
int i;
struct student *p1,*p2;
N2=0;
p1=p2=(struct student *)malloc(sizeof(struct student));
Printf ("student learning, student name \t \n");
scanf("%d%s",&p1->num2,p1->name2);
p1->nelen=0;
for(i=0;i<20;i++) p1->nelenum[i]=0;
head2=NULL;
while(p1->num2!=0)
{
N2=N2+1;
if(N2==1)head2=p1;
else p2->next=p1;
p2=p1;
p1=(struct student * )malloc(sizeof(struct student));
scanf("%d%s",&p1->num2,p1->name2);
p1->nelen=0;
for(i=0;i<20;i++) p1->nelenum[i]=0;
}
p2->next=NULL;
}
Void files ()//entry student information the child function (from file input)
{
int i=0;
FILE * fp;
char filepath[20];
struct student *p1,*p2;
N2=0;
Printf ("enter the file path you want to read:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"r"))==NULL)
{
Printf ("couldn't find the file% s! \n", filepath);
exit(0);
}
p1=p2=(struct student*)malloc(sizeof(struct student));
fread(p1,sizeof(struct student),1,fp);
head2=NULL;
while(!feof(fp))
{
i=0;
N2=N2+1;
if(N2==1)head2=p1;
else p2->next=p1;
p2=p1;
p1=(struct student * )malloc(sizeof(struct student));
fread(p1,sizeof(struct student),1,fp);
}
p2->next=NULL;
}
Void inputs ()//entry student information main function
{
int i;
Printf ("\t\t\t entry student information \n");
Printf ("\n from keyboard input \n1.");
Printf ("input from file 2. \n");
Printf ("return to the main menu 3. \n");
Printf ("Please select (1 ~ 3): \n");
scanf("%d",&i);
switch(i)
{
case(1):keyboards();break;
case(2):files();break;
case(3):break;
}
}
Void inserts (struct student * incouse)//student information management sub function (additional information)
{
struct student *p0,*p1,*p2;
p1=head2;
p0=incouse;
if(head2==NULL)
{
head2=p0;
p0->next=NULL;
}
else
{
while((p0->num2 > p1->num2) && (p1->next!=NULL))
{
p2=p1;
p1=p1->next;
}
if(p0->num2 <= p1->num2)
{
if(head2==p1) head2=p0;
else p2->next=p0;
p0->next=p1;
}
else
{
p1->next=p0;
p0->next=NULL;
}
}
N2=N2+1;
}
Void dels (int num2)//student information management sub function (delete student information)
{
struct student *p1,*p2;
if(head2==NULL)
{
Printf ("\n not the students ' information, not deleted! \n");
goto end;
}
p1=head2;
while(num2!=p1->num2 && p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(num2==p1->num2)
{
if(p1==head2) head2=p1->next;
else p2->next=p1->next;
Printf ("the student information has been deleted! \n");
N2=N2-1;
}
Else printf ("the numbers of students! \n");
end:;
}
Void managements ()//student information management main function
{
struct student * incouse;
int i,num2;
Printf ("\t\t\t student information management \n");
Printf ("1. the new student information \n");
Printf ("2. delete student information \n");
Printf ("return to the main menu 3. \n");
Printf ("Please select (1 ~ 3): \n");
scanf("%d",&i);
switch(i)
{
case(1):
{
incouse=(struct student *)malloc(sizeof(struct student));
incouse->nelen=0;
incouse->nelenum[0]=0;
Printf ("student learning, student name \t \n");
scanf("%d%s",&incouse->num2,incouse->name2);
inserts(incouse);
break;
}
case(2):
{
Printf ("enter to delete a student's school number: \n");
scanf("%d",&num2);
dels(num2);
break;
}
case(3):break;
}
}
Void elect (struct student * s)//courses
{
struct couse * p;
int num1,i;
Printf ("enter a number to the course: \n");
scanf("%d",&num1);
for(i=0;s->nelenum[i]!=0;i++);
s->nelenum[i]=num1;
(s->nelen)++;
p=head1;
while(p->num1!=num1) p=p->next;
(p->nelepeo)++;
}
Void cheak ()//Student elective sub function (query optional course)
{
char e;
struct couse * c;
struct student * s;
int num2,i,j=0,t=0;
Printf ("Please enter your school number:");
scanf("%d",&num2);
s=head2;
while(s->num2!=num2 && s->next!=NULL) s=s->next;
if(s->n
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