C language implementation of membership billing system

#include <>
#include <>
#include <>
#include <>
#define N 100
struct employee
{
int num;
char name[10];
char sex;
int age;
char xueli[30];
int wage;
int xiao;
int yu;
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(" ****************** Menu Management ****************\n ");
printf(" 1. Registration of new members");
printf(" 2 Statistical functions \n");
printf(" 3. Membership consumption settlement ");
printf(" 4. Membership Refunds\n");
printf(" 5. Renewal of membership cards");
printf(" 6 Modification of membership information\n");
printf(" 7. Lost membership card");
printf(" 8. Exit \n ");
printf(" ************* Welcome to the Membership Card Billing System ************\n");
printf("\n");
printf("\n");
}
int main()
{    int n,flag;
 char a;
char *s1;
int b,j,flg=0;
menu(); /* Calling menu functions */// These can be switched around? Remember that the code that declares the variable comes before the do
{
printf("Please select the steps you need to take(1--8):\n");
scanf("%d",&n);
if(n>=1&&n<=8)
{
flag=1;
}
else
{
flag=0;
printf("You entered incorrectly? Please make a new selection!");
}
}
while(flag==0);
while(flag==1)
{
switch(n)
{
case 1:printf(" ◆◆◆ New Member Registration ◆◆◆\n");printf("\n");input();break;
case 2:printf(" ◆◆◆◆Statistical functions◆◆◆◆\n");printf("\n");display();break;
case 3:printf(" ◆◆◆◆ Member Consumption Settlement ◆◆◆◆\n");printf("\n");search();break;
case 4:printf(" ◆◆◆◆Membership Refunds◆◆◆◆\n");printf("\n");del();break;
case 5:printf(" ◆◆◆ Membership Card Renewal◆◆◆\n");printf("\n");add();break;
case 6:printf(" ◆◆◆Member Information Modification◆◆◆\n");printf("\n");modify();break;
case 7:printf(" ◆◆◆ Lost Membership Card ◆◆◆\n");printf("\n");modify();break;
case 8:exit(0);break;
default :break;
}
getchar();
printf("\n");
printf("Whether to proceed(y or n):\n");
scanf("%c",&a);
if(a=='y')
{
flag=1;
system("cls"); /*clear screen*/
menu(); /* Calling menu functions */
printf("Please select again the step you need to operate(1--7):\n");
scanf("%d",&n);
printf("\n");
}
else
exit(0);
}
}
void input() /* Entry functions */
{
int i,m;
printf("Please enter the number of members who need to create a message(1--100):\n");
scanf("%d",&m);
for (i=0;i<m;i++)
{
printf("Card number?");
srand((int)time(0));
em[i].num=rand()%100+20000000;
if(em[i].num!=em[i-1].num)
printf("%8d ",em[i].num);
printf("\n");
printf("Please enter your name:");
scanf("%s",em[i].name);
getchar();
printf("Please enter your gender(f--womenm--male): ");
scanf("%c",&em[i].sex);
getchar();
printf("Please enter your age:");
scanf("%d",&em[i].age);
getchar();
printf("Please enter academic qualifications:");
scanf("%s",em[i].xueli);
getchar();
printf("Please enter the amount of the contribution:");
scanf("%d",&em[i].wage);
getchar();
printf("Please enter your address:");
scanf("%s",em[i].addr);
getchar();
printf("Please enter phone number:");
scanf("%d",&em[i].tel);
printf("\n");
}
printf("\n Created! \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 if it can be opened */{
printf ("cannot open file\n");
exit(0);
}
for (i=0;i<m;i++) /* Output information about members in memory to a 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 Card No. \t Name \t Sex \t Age \t Education \t Contribution Amount \t Spending Amount \t Address \t Phone Number \n");
for(i=0;i<m;i++) /*m is the number of members 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].xiao ,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 membership information:\n");
display(); /* Calling the browse function */
printf("\n");
printf("Please enter the name of the member 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 has found this person? The original record reads? \n");
printf("\n Card No. Name Gender Age Payment Amount Balance\n");
printf("\n%d\t%s\t%c\t%d\t%d\t%d\n",em[i].num,em[i].name,em[i].sex,em[i].age,em[i].wage,em[i].yu);
printf("\n indeed to delete this person's information press 1, if not press 0\n");
scanf("%d",&n);
if(n==1) /* If deleted? then all other information is moved 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;
em[j].wage=em[j+1].wage;
em[j].yu=em[j+1].yu;
}
flag=0;
}
}
}
if(!flag)
m=m-1;
else
printf("\n sorry? We don't have him! \n");
printf("\n Browse all member information after deletion:\n");
save(m); /* Call save function */
display(); /* Calling the browse function */
printf("To continue deletion, press ? To stop deleting, press \n");
scanf("%d",&t);
switch(t)
{
case 1:del();break;
case 0:break;
default :break;
}
}
void add()/* Add function */
{
FILE*fp;
int num;
int t;
int i;
int m=load();
printf("\n Original membership information:\n");
display(); /* Calling the browse function */
printf("\n");
fp=fopen("emploee_list","a");
printf("Please enter the renewal membership number:\n");
scanf("%d",&num);
for(i=0;i<m;i++)
if(num==em[i].num)
{
printf("\n has found this person? Its record is? \n");
printf("\n card number\t name\t payment amount\t spending amount\n");
printf("\n%d\t%s\t%d\t%d\t%d\n",em[i].num,em[i].name, em[i].wage,em[i].xiao);printf("\n Enter renewal amount? \n");
scanf("%d",&t);
em[i].wage= em[i].wage+t;
printf("\n renewed amount? \t%d\n",em[i].wage);
printf("\n Renewal Successful! \n");
}
}
void search()/* Query function */
{
int t,flag;
do
{
printf("\n To search by card number press 1; to search by phone number press 3, to enter the main function press 4\n");
scanf("%d",&t);
if(t>=1&&t<=4)
{
flag=1;
break;
}
else
{
flag=0;
printf("You entered incorrectly? Please make a new selection!");
}
}
while(flag==0);
while(flag==1)
{
switch(t)
{
case 1:printf("Search by card number\n");search_num();break;
case 3:printf("Search 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 membership card number you are looking for(20000001---20000100):\n");
scanf("%d",&num);
for(i=0;i<m;i++)
if(num==em[i].num)
{
printf("\n has found this person? Its record is? \n");
printf("\n Card No. \t Name \t Sex \t Age \t Payment Amount \t Phone \n");
printf("\n%d\t%s\t%c\t%d\t%d\t%ld\n",em[i].num,em[i].name,em[i].sex,em[i].age,em[i].wage,em[i].tel);
printf("\n That consumption is ;\n");
scanf("%d",&em[i].xiao);
em[i].yu=em[i].wage-em[i].xiao;
printf("\n Card No. \t Name \t Sex \t Age \t Payment Amount \t Spending Amount \t Balance \t Phone Number \n");printf("\n%d\t%s\t%c\t%d\t%d\t%d\t%d\t%ld\n",em[i].num,em[i].name,em[i].sex,em[i].age,em[i].wage, em[i].xiao,em[i].yu,em[i].tel);
break;
}
if(i==m)
printf("I'm sorry? I don't see anyone here.");
printf("\n");
printf("To return to the query function press 1, to continue querying the card number press 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 to be found:\n");
scanf("%ld",&tel);
for(i=0;i<m;i++)
if(tel==em[i].tel)
{
printf("\n has found this person? Its record is? \n");
printf("\n Card No. \t Name \t Sex \t Age \t Payment Amount \t Phone \n");
printf("\n%d\t%s\t%c\t%d\t%d\t%ld\n",em[i].num,em[i].name,em[i].sex,em[i].age,
em[i].wage,em[i].tel);
printf("\n That consumption is ;\n");
scanf("%d",&em[i].xiao);
em[i].yu=em[i].wage-em[i].xiao;
printf("\n Card No. \t Name \t Sex \t Age \t Payment Amount \t Spending Amount \t Balance \t Phone Number \n");
printf("\n%d\t%s\t%c\t%d\t%d\t%d\t%d\t%s\t%ld\n",em[i].num,em[i].name,em[i].sex,em[i].age,em[i].wage, em[i].xiao,em[i].yu,em[i].tel);
break;
}
if(i==m)
printf("I'm sorry? I don't see anyone here.");
printf("\n");
printf("To return to the query function, press , to continue searching for the phone number, press \n.");
scanf("%d",&t);
switch(t)
{
case 1:search();break;
case 2:break;
default :break;
}
}
void modify() /* Modification of functions */
{
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 membership information:\n");
display(); /* Calling the browse function */
printf("\n");
printf("Please enter the name of the member to be changed:\n");
scanf("%s",name);
for(flag=1,i=0;flag&&i<m;i++)
{
if(strcmp(em[i].name,name)==0)
{
printf("\n has found this person? The original record reads? \n");
printf("\n Card No. \t Name \t Sex \t Age \t Education \t Payment Amount \t Address \t Phone \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 indeed to change this person's information press; not to change press\n");
scanf("%d",&n);
if(n==1)
{
printf("\n Options that need to be modified\n 1. card number 2. name 3. gender 4. age 5. education 6. contribution amount 7. address 8. phone number\n");printf("Please enter the serial number of the item you wish to modify:\n");
scanf("%d",&c);
if(c>8||c<1)
printf("\n Wrong choice? Please re-select! \n");
}
flag=0;
}
}
if(flag==1)
printf("\n sorry? We don't have him! \n");
do
{
switch(c) /*Because when the i-th member is found, i is added after the for statement, so the following should assign the changed information to the i-1th person */{
case 1:printf("The card number should read: ");
scanf("%d",&num);
em[i-1].num=num;
break;
case 2:printf("The name should read: ");
scanf("%s",name);
strcpy(em[i-1].name,name);
break;
case 3:printf("Replace gender with:");
getchar();
scanf("%c",&sex);
em[i-1].sex=sex;
break;
case 4:printf("Replace age with:");
scanf("%d",&age);
em[i-1].age=age;
break;
case 5:printf("Replace academic qualifications with the following:");
scanf("%s",xueli);
strcpy(em[i-1].xueli,xueli);
break;
case 6:printf("Replace the amount of the contribution with the following: ");
scanf("%d",&wage);
em[i-1].wage=wage;
break;
case 7:printf("For residential address read: ");
scanf("%s",addr);
strcpy(em[i-1].addr,addr);
break;
case 8:printf("The telephone number should read: ");
scanf("%ld",&tel);
em[i-1].tel=tel;
break;
}
printf("\n");
printf("\n Are you sure about the modified information? \n Yes, please press; No, to change it again, please press: \n".);scanf("%d",&b);
}
while(b==2);
printf("\n Browse all member information after modification:\n");
printf("\n");
save(m);
display();
printf("\n To continue, press ? To stop revising, press \n");
scanf("%d",&t);
switch(t)
{
case 1:modify();break;
case 0:break;
default :break;
}
getchar();
}