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This article mainly explains "how to realize the student management system based on C language". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how to implement a student management system based on C language".

1. Target requirements:

1. Student performance management system

two。 Can add, delete, change, check, browse

3. Data is saved in a file

2.C language code:

File 1: source fil

# include "mylist.h" / / menu design void menu () {/ / all files are synchronized to the file printf ("- [student management information] -\ n"); printf ("\ t\ t0. Exit the system\ n "); printf ("\ t\ T1. Enter information\ n "); printf ("\ t\ T2. Browse information\ n "); printf ("\ t\ T3. Modification information\ n "); printf ("\ t\ t4. Delete message\ n "); printf ("\ t\ t5. Find information\ n "); printf ("--\ n ");} struct Node* list;// user interaction / / according to the selected menu item, do the corresponding thing void keyDown () {int choice = 0; struct student data; struct Node* pMove = NULL Scanf ("% d", & choice); switch (choice) {case 0: printf ("exit normally! \ n "); system (" pause "); exit (0); break; case 1: printf ("-enter information -\ n "); / / insert linked list fflush (stdin) / / clear the buffer! Printf ("Please enter the student's name, age, gender, telephone number:\ n"); scanf ("% s%d%s%s", data.name,&data.age,data.sex,data.tel); insertNodeByHead (list,data); break Case 2: printf ("- browse information -\ n"); printList (list); / / print linked list break Case 3: printf ("- modify information -\ n"); printf ("Please enter the name of the student to modify the information:"); scanf ("% s", data.name); reviseInfoByData (list,data.name); break Case 4: printf ("- delete information -\ n"); printf ("Please enter the name of the deleted student:"); scanf ("% s", data.name); deleteNode (list,data.name); break Case 5: printf ("- find information -\ n"); printf ("Please enter the name of the student you want to find:"); scanf ("% s", data.name) If (pMove = searchInfoByData (list,data.name)) {printf ("name\ t age\ t gender\ t phone\ n"); printf ("% s\ t% d\ t% s\ t% s\ n", pMove- > data.name,pMove- > data.age,pMove- > data.sex,pMove- > data.tel);} break Default: printf ("choose wrong, re-enter\ n"); system ("pause"); break;} writeInfoToFile (list, "1.txt");} int main () {list = createList (); readInfoFromFile (list, "1.txt"); while (1) {menu (); keyDown (); system ("pause") System ("cls");} system ("pause"); return 0;}

File 2:mylist.h

# include#include # include / / data design-"the student information abstracts struct student {char name [20]; int age; char sex [5]; char tel [20]; / / int math;// int english;}; / / structure / / the structure of the test struct Node {struct student data; struct Node* next;} / / create header struct Node* createList () {struct Node* headNode = (struct Node*) malloc (sizeof (struct Node)); headNode- > next = NULL; return headNode;} / / create node struct Node* createNode (struct student data) {struct Node* newNode = (struct Node*) malloc (sizeof (struct Node)); newNode- > data = data; newNode- > next = NULL; return newNode } / / insert node (header method) void insertNodeByHead (struct Node* headNode, struct student data) {struct Node* newNode = createNode (data); newNode- > next = headNode- > next; headNode- > next = newNode;} / / Delete void deleteNode (struct Node* headNode,char* name) {struct Node* posFrontNode; struct Node* posNode; if (headNode- > next = = NULL) {printf ("the linked list is empty! \ n "); return;} posFrontNode = headNode; posNode = headNode- > next; while (posNode & & strcmp (posNode- > data.name,name)) {posFrontNode = posNode; posNode = posFrontNode- > next;} if (! posNode) {printf (" the data you want to delete does not exist! \ n "); return;} if (! strcmp (posNode- > data.name,name)) {posFrontNode- > next = posNode- > next; free (posNode);}} / / find function struct Node* searchInfoByData (struct Node* headNode,char* name) {struct Node* posNode; if (headNode- > next = = NULL) {printf (" linked list is empty! \ n "); return NULL;} posNode = headNode- > next; while (posNode & & strcmp (posNode- > data.name,name)) {; posNode = posNode- > next;} if (! posNode) {printf (" the data you are looking for does not exist! \ n "); return NULL;} return posNode;} / / modify function void reviseInfoByData (struct Node* headNode,char* name) {struct Node* posNode; if (headNode- > next = = NULL) {printf (" linked list is empty! \ n "); return;} posNode = headNode- > next; while (posNode & & strcmp (posNode- > data.name,name)) {; posNode = posNode- > next;} if (! posNode) {printf (" the data you want to modify does not exist! \ n "); return;} printf (" Please enter the age, sex, telephone number of student [% s], posNode- > data.name); scanf ("% d%s%s", & posNode- > data.age,posNode- > data.sex,posNode- > data.tel);} / / File read operation void readInfoFromFile (struct Node* headNode,char* fileName) {/ / 1. Open the file FILE * fp; struct student data; fp = fopen (fileName, "r"); if (fp = = NULL) {fopen (fileName, "w +"); / / Open the file with creation function} / / 2. Read file while (fscanf (fp, "% s\ t% d\ t% s\ t% s\ n", data.name,&data.age,data.sex,data.tel)! = EOF) {insertNodeByHead (headNode,data);} / / 3. Close the file fclose (fp);} / / File write operation void writeInfoToFile (struct Node* headNode,char* fileName) {/ / 1. Open the file FILE * fp; fp = fopen (fileName, "w"); struct Node* pMove = headNode- > next; / / 2. Write the file while (pMove) {fprintf (fp, "% s\ t% d\ t% s\ t% s\ n", pMove- > data.name,pMove- > data.age,pMove- > data.sex,pMove- > data.tel); pMove = pMove- > next;} / / 3. Close the file fclose (fp);} / print the linked list void printList (struct Node* headNode) {struct Node* pMove = headNode- > next; / / Design column data processing printf ("name\ t age\ t gender\ t phone\ n"); while (pMove) {printf ("% s\ t% d\ t% s\ t% s\ n", pMove- > data.name,pMove- > data.age,pMove- > data.sex,pMove- > data.tel) PMove = pMove- > next;} printf ("\ n");} 3. Running result:

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