Student Performance Management System

Analytical:

Recently helped a friend to do a student performance management system equivalent to the curriculum design, they are required to write in C, for a child who is accustomed to C + + really feel the limitations of writing up to feel no language, not to say directly on the code

#include "student.h" void Main () {char ch= ' 0 '; int index=0;char id[id_size];student students;student phead; FILE *output=fopen ("Output.txt", "w+"); FILE *input=fopen ("Input.txt", "R"), if (input==null) {printf ("Open failed input\n"); exit (1);} if (input==null) {printf ("Open failed output\n"); exit (1);} Phead.next=null;initstudent (&students); while (1) {showlist ();p rintf ("Please select:"); Ch=getchar (); switch (CH) {case ' 1 ': Student_insert (&students); Break;case ' 2 ': Student_display (&students); Break;case ' 3 ': {printf (" Please enter how many students you need to find: "); scanf ("%d ", &index); Student_displaysingle (&students,index);} Break;case ' 4 ': {printf ("Please enter the number to be removed:"); scanf ("%s", id); Student_delete (&students,id);} Break;case ' 5 ': student_modify (&students); Break;case ' 6 ': {printf ("Please enter the student's name:"); scanf ("%s", id); Student_select (&students,id);} Break;case ' 7 ': Student_sortbyaverage (&students,&phead); Break;case ' 8 ': {io_readinfo (&students,output) ; fclose (output);} Break;case ' 9 ': {io_writeinfo (&students,output); fclose (output);} Break;case ' 0 ': {PRINTF ("Welcome to Student Management Performance system \ n"); exit (1);} Default:break;} GetChar ();}}

#include <stdio.h> #include <stdlib.h> #include <math.h> #include <assert.h> #include <  string.h> #define Id_size 128#define name_size 128#define SIZE 125struct Student{char id[id_size]; Student number Char name[name_size];   Student name float Math; math float 中文版;  English float Chinese; Chinese float totalscore; Total score: float Averagescore;  Average divided int passstudent; Pass number struct student *next;};   typedef struct Student student;static float passrate=0.0; Pass Rate//Initialize student information void initstudent (student *head) {strcpy (Head->id, ""); strcpy (Head->name, ""); head->chinese= 0.0;head->english=0.0;head->math=0.0;head->passstudent=0;head->totalscore=0;head->next=null;} Insert student results void Student_insert (Student *head) {int flag=0;student *cur=head;student *tmp= (Student *) malloc (sizeof ( Student) Tmp->next=null;assert (TMP!=null);p rintf ("* * * Start inputting Student Information ***\n");p rintf ("Please enter the study number:"); scanf ("%s",tmp-> ID);p rintf ("Please enter Name:"), scanf ("%s", Tmp->name);p rintf ("Enter Math score:"), scanf ("%f", &tmp->math);p rintf ("pleaseInput English score: "); scanf ("%f ", &tmp->english);p rintf (" Please input language score: "); scanf ("%f ", &tmp->chinese);tmp-> Totalscore=tmp->chinese+tmp->english+tmp->math;tmp->averagescore=tmp->totalscore/3;tmp-> Passstudent=0;if (Tmp->chinese >=60) tmp->passstudent++;if (tmp->english >=60) tmp->PassStudent++; if (Tmp->math >=60) tmp->passstudent++;if (tmp->passstudent==3) flag++;tmp->averagescore=tmp-> totalscore/3;printf ("Student Pass Number:%d\n", flag); while (Cur->next!=null) cur=cur->next;cur->next=tmp;} /* Delete Student information */void student_delete (Student *head,char *id) {Student *del=null;student *cur=head;while (Cur->next!=NULL) {if (strcmp (cur->next->id,id) ==0) {Del=cur->next;cur->next=del->next;free (del);p rintf ("delete succeeded \ n"); return;} Cur=cur->next;} printf ("Delete failed \ n");} /* Modify student Information */void student_modify (Student *head) {char number[id_size];int flag=0;student *cur=head->next;assert (cur!) =null);p rintf ("Enter student Number:"), scanf ("%s", numbers);p rintf ("Start looking up \ n"), while (cur!=null) {if (StRCMP (Cur->id,number) ==0) {printf ("Please enter the language score to be modified:"), scanf ("%f", &cur->chinese);p rintf ("Please enter the math score for Modification:"); scanf ("%f", &cur->math);p rintf ("Please enter the English score prepared for revision:"); scanf ("%f", &cur->english); flag=1;break;} Cur->next;} if (flag) printf ("Modification succeeded \ n"); elseprintf ("Modification failed \ n");} /* Query by name */void student_select (Student *head,char *name) {Student *cur=head->next;while (cur!=null) {if (strcmp (cur- >name,name) (==0) {printf ("existence of this student \ \"); return;} Cur=cur->next;} printf ("Find failed by name \ n");} /* Displays a single student record */void Student_displaysingle (Student *head,int index) {int count=1;student *cur=head->next;while (count <index && cur!=null) {cur=cur->next;count++;} if (count >index) printf ("No this student \ n"); else{printf ("%s\t%s\t%.3f\t%.3f\t%.3f\t",cur->id,cur->name,cur-> Chinese,cur->math,cur->english);p rintf ("%.3f\t%.3f\n", Cur->averagescore,cur->totalscore);}} Show all student grades void Student_display (Student *head) {int count=0;int number=0;student *cur=head->next;printf ("number \ t \ name \ T language \ n math \ t english \ t average points \ t total "); while(cur!=null) {printf ("%s\t%s\t%.3f\t%.3f\t%.3f\t", cur->id,cur->name,cur->chinese,cur->math,cur->english); printf ("%.3f\t%.3f\n", Cur->averagescore,cur->totalscore); if (Cur->chinese >=60 && cur-> english>=60 && cur->math>=60) count++;cur=cur->next;number++;} Passrate= (float) count/number*100;printf ("Pass rate:%.1f%%\n", passrate);} /* Sort by average */void student_sortbyaverage (Student *head,student *phead) {Student *pcur=null;student *tmp=null;student * Ptmp=null;student *cur=head->next;while (cur!=null) {pcur=cur;while (pcur!=null && pcur->averagescore = =int_max) pcur=pcur->next;if (pcur==null) break;tmp=pcur;while (pcur!=null) {if (Pcur->averagescore > tmp- >averagescore && Pcur->averagescore!=int_max) {tmp=pcur;} Pcur=pcur->next;} if (Tmp->averagescore!=int_max) {ptmp= (student *) malloc (sizeof (student)); assert (Ptmp!=null); strcpy (Ptmp->id , tmp->id); strcpy (ptmp->name,tmp->name);p tmp->chinese=tmp->chinese;ptmp->english=tmp->english;ptmp->math=tmp->math;ptmp->averagescore=tmp->averagescore;ptmp- >passstudent=tmp->passstudent;ptmp->totalscore=tmp->totalscore;ptmp->next=phead->next;phead- >next=ptmp;tmp->averagescore=int_max;}} Student_display (Phead);} /* Read the student information from the file */void io_readinfo (student *head,file *path) {student *cur=head->next;while (cur!=null) {if (fread, sizeof (student), 1,path) < 0) {printf ("fread failed\n"); Cur=cur->next;} printf ("read in success \ n");} /* Write student information to file */void io_writeinfo (student *head,file *path) {student *cur=head->next;while (cur!=null) {fprintf (path, "%s%s%f%f%f%f%f%d%s", Cur->id,cur->name,cur->math,cur->english,cur->chinese,cur->totalscore, Cur->averagescore,cur->passstudent, "\ n"); cur=cur->next;} printf ("Write data successfully \ n");}   Display list void Showlist () {printf ("**********************************************\n");p rintf ("* *" 1 "Insert student Score" 2 "displays all student information **\n ");p rintf (" * * "3" Display individual student "4" Delete student information **\n ");p rintf (" * * "5" Modify studentsInformation "6" by name Query **\n ");p rintf (" * * "7" Sort by average "8" read out student information from a file **\n ");p rintf (" * * "9" Write file "0" Exit Student management System **\n ");p rintf (" * * * * \ n ");}

Student Performance Management System