C language course is provided with employee information management system (large operation)

One 、 Design function ( The article is for reference only )

Employee information includes ： Job number , full name , Gender , date of birth , Marital status , The title , Home address , Telephone ,E-mail etc. . Design a staff information management system , It can provide the following functions ：
（1） Employee information entry function （ Student information is saved in files ）— Input
（2） Employee information browsing function — Output
（3） Query by job No
（4） Search by name
（5） Query by professional title
（7） Exit the system
（6） Deletion and modification of employee information

Two 、 Function display

3、 ... and 、 Mind mapping

Four 、 Program source code

#include <stdio.h>
#include <windows.h>
#include <time.h>
#include <string.h>
#define N 100
struct employee
{
    
int num;
char name[10];
char sex;
int age;
char xueli[30];
int wage;
char addr[30];
long int tel;
}em[100]; /* Define a structure */
void menu();
void input();
void save(int);
void display();
void del();
void add();
void search();
void search_num();
void search_xueli();
void search_tel();
void modify(); /* Define each function */
void menu() /* Menu functions */
{
    
printf("\n");
printf("\n");
printf(" ****************** Employee information management ****************\n"); printf(" 1. Enter employee information ");
printf(" 2. Browse employee information \n");
printf(" 3. Query employee information ");
printf(" 4. Delete employee information \n");
printf(" 5. Add employee information ");
printf(" 6. Modify employee information \n");
printf(" 7. sign out \n");
printf(" ******************** Thank you for using. ******************\n"); printf("\n");
printf("\n");
}
int main()
{
    
menu(); /* Call menu function */
int n,flag;
char a;
do
{
    
printf(" Please select the steps you need to operate (1--7):\n");
scanf("%d",&n);
if(n>=1&&n<=7)
{
    
flag=1;
break;
}
else
{
    
flag=0;
printf(" Your input is wrong , Please reselect !");
}
}
while(flag==0);
while(flag==1)
{
    
switch(n)
{
    
case 1:printf(" ◆◆◆ Enter employee information ◆◆◆\n");printf("\n");input();break;
case 2:printf(" ◆◆◆ Browse employee information ◆◆◆\n");printf("\n");display();break;
case 3:printf(" ◆◆◆ Query employee information by employee number ◆◆◆\n");printf("\n");search();break;
case 4:printf(" ◆◆◆ Delete employee information ◆◆◆\n");printf("\n");del();break;
case 5:printf(" ◆◆◆ Add employee information ◆◆◆\n");printf("\n");add();break;
case 6:printf(" ◆◆◆ Modify employee information ◆◆◆\n");printf("\n");modify();break;
case 7:exit(0);break;
default :break;
}
getchar();
printf("\n");
printf(" Whether to continue (y or n):\n");
scanf("%c",&a);
if(a=='y')
{
    
flag=1;
menu(); /* Call menu function */
printf(" Please select the steps you need to operate again (1--6):\n");
scanf("%d",&n);
printf("\n");
}
else
exit(0);
}
}
void input() /* Input function */
{
    
int i,m;
printf(" Please enter the number of employees who need to create information (1--100):\n");
scanf("%d",&m);
for (i=0;i<m;i++)
{
    
printf(" Employee number ： ");
if(em[i].num!=em[i-1].num)
printf("%8d ",em[i].num);
printf("\n");
printf(" Please enter a name : ");
scanf("%s",em[i].name);
getchar();
printf(" Please enter gender (f-- Woman  m-- male ): ");
scanf("%c",&em[i].sex);
printf(" Please enter age : ");
scanf("%d",&em[i].age);
printf(" Please enter your education : ");
scanf("%s",em[i].xueli);
printf(" Please input salary : ");
scanf("%d",&em[i].wage);
printf(" Please enter address : ");
scanf("%s",em[i].addr);
printf(" Please input the phone number : ");
scanf("%d",&em[i].tel);
printf("\n");
}
printf("\n Creation completed !\n");
save(m);
}
void save(int m) /* Save file function */
{
    
int i;
FILE*fp;
if ((fp=fopen("employee_list","wb"))==NULL) /* Create a file and determine whether it can be opened */
{
    
printf ("cannot open file\n");
exit(0);
}
for (i=0;i<m;i++) /* Output the information in memory to disk file */
if (fwrite(&em[i],sizeof(struct employee),1,fp)!=1)
printf("file write error\n");
fclose(fp);
}
int load() /* Import function */
{
    
FILE*fp;
int i=0;
if((fp=fopen("employee_list","rb"))==NULL)
{
    
printf ("cannot open file\n");
exit(0);
}
else
{
    
do
{
    
fread(&em[i],sizeof(struct employee),1,fp);
i++;
}
while(feof(fp)==0);
}
fclose(fp);
return(i-1);
}
void display() /* Browse functions */
{
    
int i;
int m=load();
printf("\n  Employee number \t full name \t Gender \t Age \t Education \t Wages \t address \t Telephone  \n");
for(i=0;i<m;i++) /*m Is the number of employees in the input section */
printf("\n %d\t%s\t%c\t%d\t%s\t%d\t%s\t%ld\n",em[i].num,em[i].name,em[i].sex,em[i].age,em[i].xueli,em[i].wage,em[i].addr,em[i].tel);
}
void del() /* Delete function */
{
    
int m=load();
int i,j,n,t,flag;
char name[20];
printf("\n  Original employee information :\n");
display(); /*  Call the browse function */
printf("\n");
printf(" Please enter the name of the employee to be deleted :\n");
scanf("%s",name);
for(flag=1,i=0;flag&&i<m;i++)
{
    
if(strcmp(em[i].name,name)==0)
{
    
printf("\n This person has been found , The original record is ：\n");
printf("\n Employee number \t full name \t Gender \t Age \t Education \t Wages \t address \t Telephone  \n");
printf("\n%d\t%s\t%c\t%d\t%s\t%d\t%s\t%ld\n",em[i].num,em[i].name,em[i].sex,em[i].age,em[i].xueli,em[i].wage,em[i].addr,em[i].tel);
printf("\n Are you sure you want to delete this person's information, press 1, If you don't want to delete, please press 0\n");
scanf("%d",&n);
if(n==1) /* If you remove , Then the other information moves up one line */
{
    
for(j=i;j<m-1;j++)
{
    
strcpy(em[j].name,em[j+1].name);
em[j].num=em[j+1].num;
em[j].sex=em[j+1].sex;
em[j].age=em[j+1].age;
strcpy(em[j].xueli,em[j+1].xueli);
em[j].wage=em[j+1].wage;
strcpy(em[j].addr,em[j+1].addr);
em[j].tel=em[j+1].tel;
}
flag=0;
}
}
}
if(!flag)
m=m-1;
else
printf("\n I'm sorry , Check no one !\n");
printf("\n  Browse all employee information after deletion :\n");
save(m); /* Call the save function */
display(); /* Call the browse function */
printf("\n To continue deleting, press 1, To not delete again, press 0\n");
scanf("%d",&t);
switch(t)
{
    
case 1:del();break;
case 0:break;
default :break;
}
}
void add()/* Add function */
{
    
FILE*fp;
int n;
int count=0;
int i;
int m=load();
printf("\n  Original employee information :\n");
display(); /*  Call the browse function */
printf("\n");
fp=fopen("emploee_list","a");
printf(" Please enter the number of employees you want to increase :\n"); scanf("%d",&n);
for (i=m;i<(m+n);i++)
{
    
printf("\n  Please enter the information of the new employee :\n"); printf(" Please enter the employee number : ");
if(em[i].num!=em[i-1].num)
printf("%8d ",em[i].num);
printf("\n");
printf(" Please enter a name : ");
scanf("%s",em[i].name);
getchar();
printf(" Please enter gender (f-- Woman  m-- male ): "); scanf("%c",&em[i].sex);
printf(" Please enter age : ");
scanf("%d",&em[i].age);
printf(" Please enter your education : ");
scanf("%s",em[i].xueli);
printf(" Please input salary : ");
scanf("%d",&em[i].wage);
printf(" Please enter address : ");
scanf("%s",em[i].addr);
printf(" Please input the phone number : ");
scanf("%d",&em[i].tel);
printf("\n");
count=count+1;
printf(" The number of people who have increased :\n");
printf("%d\n",count);
}
printf("\n Add completed !\n");
m=m+count;
printf("\n Browse all the added employee information :\n"); printf("\n");
save(m);
display();
fclose(fp);
}
void search()/* Query function */
{
    
int t,flag;
do
{
    
printf("\n For inquiry by employee No., please press 1 ;  To query by education background, please press 2 ;  For enquiries by phone number, please press 3, Enter the main function and press 4\n");
scanf("%d",&t);
if(t>=1&&t<=4)
{
    
flag=1;
break;
}
else
{
    
flag=0;
printf(" Your input is wrong , Please reselect !");
}
}
while(flag==0);
while(flag==1)
{
    
switch(t)
{
    
case 1:printf(" Query by employee No \n");search_num();break;
case 2:printf(" Query by educational background \n");search_xueli();break;
case 3:printf(" Inquire by phone number \n");search_tel();break;
case 4:main();break;
default:break;
}
}
}
void search_num()
{
    
int num;
int i,t;
int m=load();
printf(" Please enter the employee number you want to find (20001111---20009999):\n");
scanf("%d",&num);
for(i=0;i<m;i++)
if(num==em[i].num)
{
    
printf("\n This person has been found , It is recorded as ：\n");
printf("\n Employee number \t full name \t Gender \t Age \t Education \t Wages \t address \t Telephone  \n");
printf("\n%d\t%s\t%c\t%d\t%s\t%d\t%s\t%ld\n",em[i].num,em[i].name,em[i].sex,em[i].age,em[i].xueli,em[i].wage,em[i].addr,em[i].tel);
break;
}
if(i==m)
printf("\n I'm sorry , Check no one \n");
printf("\n");
printf(" To return the query function, press 1, To continue to query the employee number, please press 2\n");
scanf("%d",&t);
switch(t)
{
    
case 1:search();break;
case 2: break;
default:break;
}
}
void search_xueli()
{
    
char xueli[30];
int i,t;
int m=load();
printf(" Please enter the education you want to find :\n");
scanf("%s",xueli);
for(i=0;i<m;i++)
if(strcmp(em[i].xueli,xueli)==0)
{
    
printf("\n Already found , It is recorded as ：\n");
printf("\n Employee number \t full name \t Gender \t Age \t Education \t Wages \t address \t Telephone  \n");
printf("\n%d\t%s\t%c\t%d\t%s\t%d\t%s\t%ld\n",em[i].num,em[i].name,em[i].sex,em[i].age,em[i].xueli,em[i].wage,em[i].addr,em[i].tel);
}
if(i==m)
printf("\n I'm sorry , Check no one \n");
printf("\n");
printf(" To return the query function, press 1, Please press to continue the inquiry 2\n");
scanf("%d",&t);
switch(t)
{
    
case 1:search();break;
case 2:break;
default :break;
}
}
void search_tel()
{
    
long int tel;
int i, t;
int m=load();
printf(" Please enter the phone number you want to find :\n");
scanf("%ld",&tel);
for(i=0;i<m;i++)
if(tel==em[i].tel)
{
    
printf("\n This person has been found , It is recorded as ：\n");
printf("\n Employee number \t full name \t Gender \t Age \t Education \t Wages \t address \t Telephone  \n");
printf("\n%d\t%s\t%c\t%d\t%s\t%d\t%s\t%ld\n",em[i].num,em[i].name,em[i].sex,em[i].age,em[i].xueli,em[i].wage,em[i].addr,em[i].tel);
break;
}
if(i==m)
printf("\n I'm sorry , Check no one \n");
printf("\n");
printf(" To return the query function, press 1, Please press... To continue the inquiry 2\n");
scanf("%d",&t);
switch(t)
{
    
case 1:search();break;
case 2:break;
default :break;
}
}
void modify() /* Modify the function */
{
    
int num;
char name[10];
char sex;
int age;
char xueli[30];
int wage;
char addr[30];
long int tel;
int b,c,i,n,t,flag;
int m=load(); /* Import the information in the file */
printf("\n  Original employee information :\n");
display(); /*  Call the browse function */
printf("\n");
printf(" Please enter the name of the employee to be modified :\n");
scanf("%s",name);
for(flag=1,i=0;flag&&i<m;i++)
{
    
if(strcmp(em[i].name,name)==0)
{
    
printf("\n This person has been found , The original record is ：\n");
printf("\n Employee number \t full name \t Gender \t Age \t Education \t Wages \t address \t Telephone  \n");
printf("\n%d\t%s\t%c\t%d\t%s\t%d\t%s\t%ld\n",em[i].num,em[i].name,em[i].sex,em[i].age,em[i].xueli,em[i].wage,em[i].addr,em[i].tel);
printf("\n If you really want to modify this person's information, press 1 ;  If not, please press 0\n");
scanf("%d",&n);
if(n==1)
{
    
printf("\n Options that need to be modified \n 1. Employee number  2. full name  3. Gender  4. Age  5. Education  6. Wages 7. address  8. Telephone \n");
printf(" Please enter the serial number of the item you want to modify :\n");
scanf("%d",&c);
if(c>8||c<1)
printf("\n Wrong choice , Please reselect !\n");
}
flag=0;
}
}
if(flag==1)
printf("\n I'm sorry , Check no one !\n");
do
{
    
switch(c) /* Because when you find the first i When an employee ,for After the statement i Self added 1, Therefore, the following should assign the changed information to the second i-1 personal */
{
    
case 1:printf(" The employee number is changed to : ");
scanf("%d",&num);
em[i-1].num=num;
break;
case 2:printf(" Name changed to : ");
scanf("%s",name);
strcpy(em[i-1].name,name);
break;
case 3:printf(" Gender changed to : ");
getchar();
scanf("%c",&sex);
em[i-1].sex=sex;
break;
case 4:printf(" Change the age to : ");
scanf("%d",&age);
em[i-1].age=age;
break;
case 5:printf(" Education changed to : ");
scanf("%s",xueli);
strcpy(em[i-1].xueli,xueli);
break;
case 6:printf(" The salary is changed to : ");
scanf("%d",wage);
break;
case 7:printf(" Change your address to : ");
scanf("%s",addr);
strcpy(em[i-1].addr,addr);
break;
case 8:printf(" Change the phone number to : ");
scanf("%ld",&tel);
em[i-1].tel=tel;
break;
}
printf("\n");
printf("\n Whether to confirm the modified information ?\n  yes   Please press 1 ;  No , Revise   Please press 2: \n"); scanf("%d",&b);
}
while(b==2);
printf("\n Browse all the modified employee information :\n");
printf("\n");
save(m);
display();
printf("\n To continue modifying, please press 1, If you don't want to modify it again, please press 0\n");
scanf("%d",&t);
switch(t)
{
    
case 1:modify();break;
case 0:break;
default :break;
}
}

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