C language implements the staff management system

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person.cpp

#include "person.h"

// Home page 
int Print_Head(int * num)
{
 printf("\t***********************************************\n");
 printf("\t|      Staff management system     |\n");
 printf("\t*---------------------------------------------*\n");
 printf("\t|    【 1  】  new    【 2 Revised.    |\n");
 printf("\t*    【 3  】  the query    【 4  】  exit    *\n");
 printf("\t***********************************************\n");
 printf("\t ◎ Please enter the serial number that you want to operate [   】 \b\b");
 *num=getchar();
 return SUCCESS;
}

// Bowdlerize picture 
int Print_DelRev(int* num)
{
 printf("\t******************************************\n");
 printf("\t*          *\n");
 printf("\t*  【 1  】  delete   【 2  】  to modify   【 3  】  returns  *\n");
 printf("\t*          *\n");
 printf("\t******************************************\n");
 printf("\t ◎ Please enter the serial number that you want to operate [   】 \b\b");
 *num=getchar();
 return SUCCESS;
}

// The query image 
int Print_Que(int* num)
{
 printf("\t******* ************************************\n");
 printf("\t*          *\n");
 printf("\t*   【 1 All enquiries   【 2  】  Job number query   *\n");
 printf("\t*          *\n");
 printf("\t*   【 3 Fuzzy query   【 4 Back to menu   *\n");
 printf("\t*          *\n");
 printf("\t******************************************\n");
 printf("\t ◎ Please enter the serial number that you want to operate [   】 \b\b");
 *num=getchar();
 return SUCCESS;
}

// Increase the picture 
int Print_Add(int* num)
{
 int n=0;
 printf("\t******************************************\n");
 printf("\t*          *\n");
 printf("\t*  【 1  】  new   【 2 added   【 3  】  returns  *\n");
 printf("\t*          *\n");
 printf("\t******************************************\n");
 printf("\t ◎ Please enter the serial number that you want to operate [   】 \b\b");
 *num=getchar();
 return SUCCESS;
}

// header 
int Print_Tittle()
{
 printf("-------------------------------------------\n");
 printf("  Work number  |  The name  | gender | age |  The phone   \n");
 printf("-------------------------------------------\n");
 return SUCCESS;
}

// Select the file to open 
int File_name()
{
 printf("\n\t Please enter the file you want to open :");
 //memset(filename,0,sizeof(filename));
 if(scanf("%s", filename)!=1){
 printf("\a  File selection error !");
 return FAILED;
 }
 return SUCCESS;
}


// Generate linked lists, parameters n is add Record the number 
struct Employee *Creat() {
 printf("\n\t ◎ Please enter the number of data to add :");
 int n;
 if(scanf("%d", &n)!=1) {
 printf("\a error!");
 }
 struct Employee *head;
 struct Employee *p1, *p2;

 system("cls");
 for(int i=1;i<n+1;i++) {
 p1 = (struct Employee*)malloc(SIZE);
 Print_Tittle();
 scanf("%s%s%s%d%s",p1->num,p1->name,p1->sex,
 p1->age,p1->tel);
 p1->next = NULL;
 if(i==1) {
 head = p2 = p1;
 }
 else {
 p2->next = p1;
 p2 = p1;
 }
 }
 return(head);
}

// Create a new file 
int WriteData_wb(struct Employee *head) {
 FILE *fp;
 struct Employee *p;
 if((fp = fopen(filename, "wb"))==NULL)
 printf("\a  Error opening file !"); 
 p = head;
 while(p!=NULL) {
 if(fwrite(p,SIZE,1,fp)!=1) {
 printf("\b  Error writing data \n");
 fclose(fp);
 return FAILED;
 }
 p=p->next;
 }
 fclose(fp);
 return SUCCESS;
}

// Add to an existing file 
int WriteData_ab(struct Employee *head) {
 FILE *fp;
 struct Employee *p;
 if((fp = fopen(filename, "ab"))==NULL)
 printf("\a  Error opening file !");
 p = head;
 while(p!=NULL) {
 if(fwrite(p,SIZE,1,fp)!=1) {
 printf("\b  Error writing data \n");
 fclose(fp);
 return FAILED;
 }
 p=p->next;
 }
 fclose(fp);
 return SUCCESS;
}


// increase 
int Emp_Add()
{
 system("cls");
 getchar();
 int add;
 while(1){
 system("cls");
 Print_Add(&add);
 while(add!='1' && add!='2' && add!='3') {
 putchar('\a');
 printf(" ◎ Please re-enter the valid serial number (1~3): 【   】 \b\b");
 add=getchar();
 }
 switch(add){
 case '1':
 WriteData_wb(Creat());
 printf("\n ◎ New file success data has been saved √ \n");
 system("pause");
 system("cls");
 Emp_Add();
 break;
 case '2':
 WriteData_ab(Creat());
 printf("\n ◎ Data has been successfully added √ \n");
 system("pause");
 system("cls");
 Emp_Add();
 break;
 case '3':
 system("cls");
 getchar();
 Emp_Return();
 break;
 }
 }
 return SUCCESS;
}

// Read the file's data to the linked list and return it head Pointer to the 
struct Employee *Read() {
 struct Employee *head = NULL;
 struct Employee *p1, *p2;//s = p1;p = p2;

 FILE *fp;
 if((fp=fopen(filename,"rb+"))==NULL)
 {
 printf(" Error opening file \n");
 exit(0);
 }
 while(!feof(fp)) {
 if((p1=(struct Employee*)malloc(SIZE))==NULL){
 printf(" Memory request error \n");
 fclose(fp);
 exit(0);
 }
 if(fread(p1,SIZE,1,fp)!=1){
 free(p1);
 break;
 }
 if(head==NULL)
 head=p2=p1;
 else{
 p2->next=p1;
 p2=p1;
 }
 }
 fclose(fp);
 return (head);
}

// delete 
int Emp_Del()
{
 struct Employee* head;
 struct Employee* pt1,*pt2;
 char str_num[10];
 memset(str_num,0,sizeof(str_num));
 printf("\n ◎ Please enter the student id information you want to delete: ");
 scanf("%s",str_num);
 pt1=Read();
 pt2=pt1->next;
 head=pt1;
 while(pt2!=NULL){
 if(!strcmp(pt1->num,str_num)){
 WriteData_wb(pt2);
 }else if(!strcmp(pt2->num,str_num)){
 pt1->next=pt2->next;
 WriteData_wb(head);
 }
 pt2=pt2->next;
 pt1=pt1->next;
 }
 if(pt2!=NULL){
 printf("\t ◎ There is no data you want to delete ");
 }
 return SUCCESS;
}

// Modify the 
int Emp_Rev()
{
 struct Employee* pt1,*pt2,*head;
 char str_num[10];
 printf("\t ◎ Please enter the student number information you want to modify: ");
 scanf("%s",str_num);
 pt1=Read();
 pt2=pt1->next;
 head=pt1;
 while(pt2!=NULL){
 if(strcmp(pt1->num,str_num)==0) {
 Print_Tittle();
 scanf("%s%s%s%d%s",pt1->num,pt1->name,pt1->sex,
 pt1->age,pt1->tel);
 WriteData_wb(head);
 }
 else if(strcmp(pt2->num,str_num)==0) {
 Print_Tittle();
 scanf("%s%s%s%d%s",pt1->num,pt1->name,pt1->sex,
 pt1->age,pt1->tel);
 WriteData_wb(head);
 }
 pt2 = pt2->next;
 pt1 = pt1->next;
 }
 if(pt2!=NULL)
 printf(" There is no data stored in the database that you want to delete! \n");
 return 0;
}

// bowdlerize 
int Emp_DelRev()
{
 
 getchar();
 int delrev=0;
 while(1){
 system("cls");
 Print_DelRev(&delrev);
 while(delrev!='1' && delrev!='2' && delrev!='3'){
 putchar('\a');
 //getchar();
 printf(" Please re-enter the valid serial number (1~3): 【   】 \b\b");
 delrev=getchar();
 }
 switch(delrev){
 case '1':
 Emp_Del();
 printf("\n ◎ The specified data has been deleted successfully !");
 system("pause");
 getchar();
 break;
 case '2':
 Emp_Rev();
 printf("\n The specified data has been successfully modified !");
 system("pause");
 getchar();
 break;
 case '3':
 system("cls");
 getchar();
 Emp_Return();
 break;
 }
 }
 return SUCCESS;
}

// The overall query 
int Emp_QueAll()
{
 struct Employee *pt;
 pt = Read();
 Print_Tittle();
 do {
 printf("%2s%5s%4s%2d%3s\n",
 pt->num,pt->name,pt->sex,pt->age,pt->tel);
 pt = pt->next;
 }while(pt!=NULL);
 printf("\n\n");
 return SUCCESS;
}

// Job number query 
int Emp_QueNum() 
{
 struct Employee *pt;
 char str_num[10];
 printf("\t Please enter the student number you want to check :");
 scanf("%s", str_num);
 pt = Read();
 Print_Tittle();
 do {
 if(!strcmp(pt->num,str_num)) {
 printf("%2s%5s%4s%2d%3s\n",
 pt->num,pt->name,pt->sex,pt->age,pt->tel);
 printf("\n\n");
 return 0;
 }
 pt = pt->next;
 }while(pt!=NULL);
 printf("\t There is no data stored in the database that you want to query! \n");
 printf("\n\n");
 return SUCCESS;
}

// Fuzzy query 
int Emp_QueVague()
{
 struct Employee *pt;
 char str_vague[20];
 int m=0;
 printf("\t Please enter the key words you want to query :");
 scanf("%s", str_vague);
 pt = Read();
 Print_Tittle();
 do {
 if(strstr(pt->num,str_vague)!=0||strstr(pt->name,str_vague)!=0
 ||strstr(pt->sex,str_vague)!=0||strstr(pt->age,str_vague)!=0
 ||strstr(pt->tel,str_vague)!=0) {
 printf("%2s%5s%4s%2d%3s\n",
 pt->num,pt->name,pt->sex,pt->age,pt->tel);
 m = 1;
 }
 pt = pt->next;
 }while(pt!=NULL);
 if(!m)
 printf(" There is no data stored in the database that you want to query! \n");
 printf("\n\n");
 return SUCCESS;
}

// The query 
int Emp_Que()
{
 system("cls");
 int que;
 while(1){
 system("cls");
 Print_Que(&que);
 while(que!='1' && que!='2' && que!='3'){
 putchar('\a');
 printf("\t Please re-enter the valid serial number (1~3): 【   】 \b\b");
 que=getchar();
 }
 switch(que){
 case '1':
 Emp_QueAll();
 system("pause");
 getchar();
 break;
 case '2':
 Emp_QueNum();
 system("pause");
 getchar();
 break;
 case '3':
 Emp_QueVague();
 system("pause");
 getchar();
 break;
 case '4':
 Emp_Return();
 system("pause");
 getchar();
 break;
 }
 }
 return SUCCESS;
}

// return 
int Emp_Return()
{
 Emp_Menu();
 return SUCCESS;
}

// exit 
void Emp_Quit()
{
 printf("\n\t ◎ Thanks for using! ");
 system("pause");
 exit(0);
}

//menu function 
int Emp_Menu()
{
 //int* Menu=NULL;
 int menu=0;
 //Print_Head(&Menu);
 //menu=*Menu;
 //delete Menu;
 //printf("%d\n",menu);
 Print_Head(&menu);
 
 while(menu!='1' && menu!='2' && menu!='3'&& menu!='4') {
 printf("error! please input the right number!\n");
 putchar('\a');
 //getchar();
 printf(" ◎ Please re-enter the valid serial number (1~4): 【   】 \b\b");
 menu=getchar();
 }
 switch(menu){
 case '1': 
 File_name();
 Emp_Add();
 break;
 case '2': 
 File_name();
 Emp_DelRev();
 break;
 case '3': 
 File_name();
 Emp_Que();
 break;
 case '4': 
 Emp_Quit();
 break;
 }
 return SUCCESS;
}
/*void Sig(int n)
{
 printf("\n\t ◎ The program will exit, operation has been saved! ");
 system("pause");
 exit(0);
}*/
int main()
{
 //printf("\t When using Ctrl+C Terminates the current program! \n");
 //signal(SIGINT,Sig);
 Emp_Menu();
 return SUCCESS;
}

person.h

#ifndef __PERSON_H__
#define __PERSON_H_
#define _CRT_SECURE_NO_DEPRECATE
#define _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES 1
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#include <signal.h>
#define SUCCESS  0
#define FAILED (!SUCCESS)
#define SIZE sizeof(struct Employee)
// The global variable 
int flag=0;// Return to sign 
char filename[30];// File name to open 
// Employee information structure 
struct Employee{
 char name[20];
 char tel[15];
 char sex[5]; 
 char num[10];
 char age[3];
 struct Employee* next;
};

// To establish 1 A linked list 
struct Employee* creat(int n);

// The main function 
int Emp_Menu();
// Home page to print 
int Print_Head();
// Censored print 
int Print_DelRev();
// Add printing 
int Print_Add();
// Header to print 
int Print_Tittle();
// New file write 
int WriteData_wb(struct Employee *head);
// Write to an existing file 
int WriteData_ab(struct Employee *head);
// add 
int Emp_Add();
// delete 
int Emp_Del();
// Modify the 
int Emp_Rev();
// The query 
int Emp_Que();
// return 
int Emp_Return();
// exit 
void Emp_Quit();

#endif //__PERSON_H__

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