C language final experiment report (student achievement management system) source code

university C Language final comprehensive experiment report source code

Student achievement management system

1. Compile and run the following source code .
2. Wait a few seconds to display the operation window interface .
   
3. Input 1 And then go back , Create a linked list . Enter the number of students in turn , Student number , full name , Grades in various subjects, etc . After input, press any key to end . Here's the picture .
   
4. Input 3 And then go back . Save the file . Display saved successfully . Press any key to end . Here's the picture
   
5. Input 2 enter , View the data . Here's the picture .
   
6. Input 5 enter , Exit the system .
   

Source code is as follows

#include "stdio.h"
#include "stdlib.h"
#include "conio.h"
int num;
struct xs
{
    
   int xh;
   char xm[20];
   int gs,yy,wl;
   double pj;
   struct xs *next;
};
struct xs *create()
{
    
   int i;
   struct xs *p=NULL,*hd=(struct xs *)malloc(sizeof(struct xs));
   hd->next=NULL;
   printf(" Please input the number of students :");
   scanf("%d",&num);
   for(i=1;i<=num;i++)
   {
    
      p=(struct xs *)malloc(sizeof(struct xs));
	  printf(" Please enter the first %d A student %d-%d\n",i,num,i);
	  printf(" Student number :");
	  scanf("%d",&p->xh);
	  printf(" full name :");
	  scanf("%s",p->xm);
	  printf(" Advanced Mathematics :");
	  scanf("%d",&p->gs);
	  printf(" English :");
	  scanf("%d",&p->yy);
	  printf(" Physics :");
	  scanf("%d",&p->wl);
	  p->pj=(p->gs+p->yy+p->wl)/3.0;

	  p->next=hd->next;
	  hd->next=p;
   }
   printf(" End of creation , Please press any key to end !\n");
   getch();
   return hd;
}
void print(struct xs *hd)
{
    
   if(hd==NULL)
   {
    
       printf(" Linked list is empty. , Please create the linked list or read the file first , Press any key to continue !\n");
	   getch();
   }
   else
   {
    
      struct xs *p=hd->next;
	  printf("*********************************************************\n");
	  printf("  Student number   full name   Advanced Mathematics   English   Physics   Average  \n");
	  printf("*********************************************************\n");
	  while(p!=NULL)
	  {
    
	    printf("%4d %-6s %5d %5d %5d %5.2f\n",p->xh,p->xm,p->gs,p->yy,p->wl,p->pj);
		p=p->next;
	  }
	  printf("*********************************************************\n");
	  printf(" Show end , Please press any key to continue !\n");
	  getch();
   }
}
void sf(struct xs *hd)
{
    
   if(hd!=NULL)
   {
    
      struct xs *p=hd->next;
	  while(p!=NULL)
	  {
    
	     hd->next=p->next;
		 free(p);
		 p=hd->next;
	  }
	  free(hd);
   }
}
void save(struct xs *hd)
{
    
   if(hd==NULL)
   {
    
      printf(" Linked list is empty. , Unable to save file , Please press any key to continue !\n");
	  getch();
   }
   else
   {
    
      FILE *fp=fopen("1.txt","w");
	  struct xs *p=hd->next;
	  fprintf(fp,"%d\n",num);
	  while(p!=NULL)
	  {
    
	     fprintf(fp,"%d %s %d %d %d %lf\n",p->xh,p->xm,p->gs,p->yy,p->wl,p->pj);
		 p=p->next;
	  }
	  fclose(fp);
	  printf(" End of linked list saving , Please press any key to continue !\n");
	  getch();
   }
}
struct xs *read()
{
    
   FILE *fp=fopen("1.txt","r");
   if(fp!=NULL)
   {
    
	   int rs,i;
	   struct xs *p=NULL,*hd=(struct xs *)malloc(sizeof(struct xs));
	   hd->next=NULL;
	   fscanf(fp,"%d\n",&rs);
	   for(i=1;i<=rs;i++)
	   {
    
	      p=(struct xs *)malloc(sizeof(struct xs));
		  fscanf(fp,"%d %s %d %d %d %lf\n",&p->xh,p->xm,&p->gs,&p->yy,&p->wl,&p->pj);
		  p->next=hd->next;
		  hd->next=p;
	   }
	   fclose(fp);
	   printf(" End of file read , Please press any key to continue !\n");
	   getch();
	   return hd;
   }
   else
   {
    
      printf(" No data files , Please save the file first , Press any key to continue !\n");
	  getch();
	  return NULL;
   }
}
void menu()
{
    
   system("cls");
   printf("*****************************************\n");
   printf("*  Student management system (1.0) *\n");
   printf("*****************************************\n");
   printf("* *\n");
   printf("*****************************************\n");
   printf("** 1- Create a linked list  **\n");
   printf("** 2- data display  **\n");
   printf("** 3- Save the file  **\n");
   printf("** 4- Read the file  **\n");
   printf("** 5- System exit  **\n");
   printf("*****************************************\n");
   printf("**  Please select action (1-5) **\n");
   printf("*****************************************\n");
}
void main()
{
    
   struct xs *head=NULL;
   int xz=0;
   while(xz!=5)
   {
    
      menu();
	  scanf("%d",&xz);
	  switch(xz)
	  {
    
	     case 1:sf(head);head=create();break;
		 case 2:print(head);break;
		 case 3:save(head);break;
		 case 4:sf(head);head=read();break;
         case 5:sf(head);break;   
	  }
   }
}