Using C language to compile student achievement management system (C language student achievement management system deleted)

Hello everyone , I meet you again , I'm your friend, Quan Jun .

One 、 Course design topic

① Basic requirements topic ： Matrix multiplication .

② Comprehensive training ： Student achievement management system

Two 、 The design requirements

Matrix multiplication ： Write a function implementation matrix A(2 That's ok 3 Column ) And matrix B

Multiply (3 That's ok 2 Column ), Product on C Array . Enter two arrays multiplied in the main function , And output the result .

Student achievement management ：( Array of structs 、 function 、 The pointer 、 Algorithm 、 Comprehensive application of process structure and documents )

Program description ： Yes N A student , The data of each student contains the student number ( No repetition )、 full name 、 The grades and average grades of the three courses , Try to design a student achievement management system , It can provide the following functions ：

Student achievement management system

1、 Score entry

2、 Score inquiry

3、 Score statistics

4、 refund 　　 Out

(1) The main menu

(2) Functions of each menu item

① Score entry ： Enter the student number 、 Name and grades of three courses ;

② Score inquiry ：( At least one query method ).

v Query student records by student number .

v Check the records of failed students .

③ Score statistics ：

v Calculate the average score of students ;

v According to the average score of students , Sort the students' data and output ;

v Sort the students' grades in a single subject , Output the student's name and the grade of the subject ;

④ Exit the system ： Exit the whole system ( Main menu ).

(3) Array of structs ：

＃define N 30

struct student

{int

num;

char

name[20];

float score[3];

float

average;

};struct student stu[N];

3、 ... and 、 Data structure design description

System function description

1 Be able to input the student number 、 full name 、 Three grades and calculate the average score .

2 Be able to output student records in the form of tables

3 Be able to sort according to the average scores of students in three subjects

4 Be able to sort according to students' single subject scores

5 Be able to query student records according to student number

6 Insert student records into the table

7 Delete student records from the table

8 Store records in files

9 Read records from files

10 sign out

The data dictionary

1 data flow

Data stream name ： All records

Alias ： nothing

sketch ： All the records about students' grades after the latest update

source ： database

Whereabouts ： machining “ Record screening ”

Data traffic ： There is no limit

form ： Student number + full name +SC1+SC2+SC3+ Average score

Data storage bar

Data store name ： Student record

Alias ： nothing

sketch ： Store all information available to students

form ： Student number + full name +SC1+SC2+SC3+ Average score

Organization ： Index file , Take the student number as the keyword

Query requirements ： It is required to inquire immediately

2 Data item entry

Data item name ： Student number

Alias ： nothing

sketch ： Student numbers of all school students

type ： character string

3 Processing items

Processing name ： Changed records

Excitation conditions ： The student record has been changed

priority ： Ordinary

Input ： New record

Output ： Update data 、 Data unchanged

Processing logic ： According to the existing student record

if New record <> Old record

then Update data

else Data unchanged

endif

Design test process

1、 Enter interface

2、 Input options 0, enter ;

Enter data as prompted

3、 Back to the main menu ;

Input options 8, enter ;

Input file name ：data, enter ;

A success message appears , Then the read file operation succeeds .

4、 Back to the main menu , Input 1, enter

Every time 10 Pause display data

5、 Back to the main menu , Input 2, enter

The sorting success message appears .

6、 Back to the main menu , Input 3, enter

The sorting success message appears .

7、 Back to the main menu , Input 5, enter

Insert a set of data as prompted

8、 Back to the main menu , Input 6, enter

Press the prompt to enter a name , Delete data

The message of successful deletion appears

9、 Back to the main menu , Input 4, enter

Enter the student number to query

10、 Back to the main menu , Input 1, enter

Statistics appear

11、 Back to the main menu , Input 7, enter

Input result, enter

The message that the file was successfully written appears

12、 Back to the main menu , Input 9, Press enter to exit the system

Four 、 Definition and function of each variable

#define N 3 Defining constants

typedef struct z1 Define the data structure

{ char no[11];

char name[15];

int score[N];

float sum;

float average;

int order;

struct z1 *next;

}STUDENT;

char *menu[] Define the menu string array

Enter list Input record

Print list Display all records in the single linked list

Sort to make new file Sort according to the total score

sort to Single course result Sort according to the scores of single subjects

Search record on ID Search the record according to the student number

Insert record to list Insert record into table

Delete a record from list Delete a record from a table

Save the file Save the records in the single linked list to a file

Load the file Read records from files */

Quit sign out

STUDENT *init() Initialize linked list

STUDENT *create() Create a linked list , Complete the data entry function

inputs(char *prompt, char *s, int count) Custom input control function inputs

Publisher ： Full stack programmer stack length , Reprint please indicate the source ：https://javaforall.cn/128282.html Link to the original text ：https://javaforall.cn