Payroll Management System In C

# include <stdio.h>
# include <conio.h>
# include <stdlib.h>
# include <string.h>

# define EMP_FILE "empdata.txt"
# define TMP_FILE "tmpdata.txt"

# define EPF_RATE 0.18
# define ETF_RATE 0.03
# define GEN_TIME (8 * 20)
# define PWD "amita\0"

int main(int, char**);
void welcome_message(void);
void get_password(void);
void main_menu(void);
void manage_employee(void);
void add_employee(void);
void delete_employee(void);
void edit_employee(void);
void search_employee(void);
void print_report(void);
void print_slip(void);
void emp_menu(void);
void exit_message(void);

int main(int argc, char *argv[])
{
char menuOpt;
int isExit = 0;
welcome_message();
if(argc > 1)
{
clrscr();
printf("%s : Start Up Error >>> ", argv[0]);
fflush(stdin);
getch();
return (EXIT_FAILURE);
}
get_password();
do
{
main_menu();
fflush(stdin);
menuOpt = (char)getch();
switch(menuOpt)
{
case '1':
{
manage_employee();
break;
}
case '2':
{
print_report();
break;
}
case '3':
{
print_slip();
break;
}
case '4':
{
isExit = 1;
break;
}
default:
{
clrscr();
printf("Invalid Option!");
fflush(stdin);
getch();
break;
}
}
}while(isExit == 0);
exit_message();
fflush(stdin);
getch();
    return (0);
}

void welcome_message(void)
{
clrscr();
printf(" WELCOME\n");
printf("\n\nPAYROLL MANAGEMENT SYSTEM\n");
printf("\n    ________________________________________\n\n\n\n\n\n\n");
printf("SUBMITTED TO\n\n");
printf("Faculty Name\n");
printf("\n\n");
printf("\t\t\t\t\t");
printf("SUBMITTED BY\n\n");
printf("\t\t\t\t\t");
printf("www.sourcecodernp.blogspot.com\n");

fflush(stdin);
getch();
}

void main_menu(void)
{
clrscr();
printf("MENU\n");
printf(" ----\n");
printf("[1] : Manage Employees\n");
printf("[2] : Print Report\n");
printf("[3] : Print Slip\n");
printf("[4] : Exit\n\n");
printf(" >>> ");
}

void manage_employee(void)
{
char menuOpt;
int isExit = 0;
do
{
emp_menu();
fflush(stdin);
menuOpt = (char)getch();
switch(menuOpt)
{
case '1':
{
add_employee();
break;
}
case '2':
{
delete_employee();
break;
}
case '3':
{
edit_employee();
break;
}
case '4':
{
search_employee();
break;
}
case '5':
{
isExit = 1;
fflush(stdin);
break;
}
default:
{
clrscr();
printf("Invalid Option!");
getch();
}
}
}while(isExit == 0);
}

void add_employee(void)
{
char name[50];
char address[100];
char phone[11];
char id[5];
float salary;
float hours;
FILE *fp;
fp = fopen(EMP_FILE, "a+");
do
{
fscanf(fp, "%[^/]%*c%[^/]%*c%[^/]%*c%[^/]%*c%f %f%*c", name, address, phone, id, &salary, &hours);
if(feof(fp))
{
break;
}
}while(!(feof(fp)));
clrscr();

printf("Name: ");
fflush(stdin);
gets(name);
printf("Address: ");
fflush(stdin);
gets(address);
printf("Phone: ");
fflush(stdin);
gets(phone);
printf("ID: ");
fflush(stdin);
gets(id);
printf("Salary: ");
fflush(stdin);
scanf("%f", &salary);
printf("Hours: ");
fflush(stdin);
scanf("%f", &hours);
fprintf(fp, "%s/%s/%s/%s/%.2f %.2f\n", name, address, phone, id, salary, hours);
fflush(fp);
fclose(fp);
clrscr();
printf("Done Entering New Record >>> ");
getch();
}

void delete_employee(void)
{
char name[50];
char address[100];
char phone[11];
char id[5];
char idDel[5];
float salary;
float hours;
FILE *fp1;
FILE *fp2;
fp1 = fopen(EMP_FILE, "r");
fp2 = fopen(TMP_FILE, "w");
clrscr();
printf("Enter Employee ID to Delete : ");
fflush(stdin);
gets(idDel);
do
{
fscanf(fp1, "%[^/]%*c%[^/]%*c%[^/]%*c%[^/]%*c%f %f%*c", name, address, phone, id, &salary, &hours);
if(feof(fp1))
{
break;
}
if((strcmp(id, idDel)) != 0)
{
fprintf(fp2, "%s/%s/%s/%s/%.2f %.2f\n", name, address, phone, id, salary, hours);
}
}while(!(feof(fp1)));
fflush(fp2);
fclose(fp1);
fclose(fp2);
remove(EMP_FILE);
rename(TMP_FILE, EMP_FILE);
clrscr();
printf("Done Deleting >>> ");
fflush(stdin);
getch();
}

void edit_employee(void)
{
char name[50];
char address[100];
char phone[11];
char id[5];
char idEdit[5];
float salary;
float hours;
FILE *fp1;
FILE *fp2;
fp1 = fopen(EMP_FILE, "r");
fp2 = fopen(TMP_FILE, "w");
clrscr();
printf("Enter Employee ID to Edit : ");
fflush(stdin);
gets(idEdit);
do
{
fscanf(fp1, "%[^/]%*c%[^/]%*c%[^/]%*c%[^/]%*c%f %f%*c", name, address, phone, id, &salary, &hours);
if(feof(fp1))
{
break;
}
if((strcmp(id, idEdit)) == 0)
{
clrscr();
printf("Enter new basic salary : ");
fflush(stdin);
scanf("%f", &salary);
printf("Enter the new number of hours worked : ");
fflush(stdin);
scanf("%f", &hours);
}
fprintf(fp2, "%s/%s/%s/%s/%.2f %.2f\n", name, address, phone, id, salary, hours);
}while(!(feof(fp1)));
fflush(fp2);
fclose(fp1);
fclose(fp2);
remove(EMP_FILE);
rename(TMP_FILE, EMP_FILE);
clrscr();
printf("Done Editing >>> ");
fflush(stdin);
getch();
}

void search_employee(void)
{
char name[50];
char address[100];
char phone[11];
char id[5];
char idSearch[5];
float salary;
float hours;
FILE *fp;
fp = fopen(EMP_FILE, "r");
clrscr();
printf("Enter the Employee ID to Search : ");
fflush(stdin);
gets(idSearch);
do
{
fscanf(fp, "%[^/]%*c%[^/]%*c%[^/]%*c%[^/]%*c%f %f%*c", name, address, phone, id, &salary, &hours);
if(feof(fp))
{
break;
}
if((strcmp(id, idSearch)) == 0)
{
clrscr();
printf("Name: %s\n", name);
printf("Address: %s\n", address);
printf("Phone: %s\n", phone);
printf("ID: %s\n", id);
printf("Salary: %.2f\n", salary);
printf("Hours: %.2f\n\n", hours);
printf("Press ENTER to continue >>> ");
fflush(stdin);
getch();
}
}while(!(feof(fp)));
fclose(fp);
}

void print_report(void)
{
char name[50];
char address[100];
char phone[11];
char id[5];
float salary;
float hours;
float epf;
float etf;
float netSal;
float ot, otRate, otHrs;
FILE *fp;
fp = fopen(EMP_FILE, "r");
clrscr();
do
{
fscanf(fp, "%[^/]%*c%[^/]%*c%[^/]%*c%[^/]%*c%f %f%*c", name, address, phone, id, &salary, &hours);
if(feof(fp))
{
break;
}
epf = salary * EPF_RATE;
etf = salary * ETF_RATE;
otHrs = hours - GEN_TIME;
otRate = salary / GEN_TIME;
if(otHrs > 0)
{
ot = otHrs * otRate;
}
else
{
ot = 0;
otHrs = 0;
}
netSal = salary - (epf + etf) + ot;
printf("%5s %5.2f %3.2f %3.2f %3.2f %5.2f %5.2f %5.2f %5.2f\n", id, salary, hours, otHrs, ot, epf, etf, netSal);
getch();
}while(!(feof(fp)));
fclose(fp);
}

void print_slip(void)
{
char name[50];
char address[100];
char phone[11];
char id[5];
char empId[5];
float salary;
float hours;
float epf;
float etf;
float netSal;
float ot, otRate, otHrs;
FILE *fp;
fp = fopen(EMP_FILE, "r");
clrscr();
printf("Enter Employee ID to print : ");
fflush(stdin);
gets(empId);
do
{
fscanf(fp, "%[^/]%*c%[^/]%*c%[^/]%*c%[^/]%*c%f %f%*c", name, address, phone, id, &salary, &hours);
if(feof(fp))
{
break;
}
if((strcmp(id, empId)) == 0)
{
epf = salary * EPF_RATE;
etf = salary * ETF_RATE;
otHrs = hours - GEN_TIME;
otRate = salary / GEN_TIME;
if(otHrs > 0)
{
ot = otHrs * otRate;
}
else
{
ot = 0;
otHrs = 0;
}
netSal = salary - (epf + etf) + ot;
clrscr();
printf("Name: %s\n", name);
printf("Address: %s\n", address);
printf("Phone: %s\n", phone);
printf("id: %s\n", id);
printf("Basic Salary: %.2f\n", salary);
printf("Total Hours: %.2f\n", hours);
printf("OT Hours: %.2f\n", otHrs);
printf("OT Rate: %.2f\n", otRate);
printf("OT Amount: %.2f\n", ot);
printf("EPF: %.2f\n", epf);
printf("ETF: %.2f\n", etf);
printf("Net Salary: %.2f\n", netSal);
}
}while(!(feof(fp)));
fclose(fp);
printf("Done >>> ");
fflush(stdin);
getch();
}

void get_password(void)
{
char password[7];
do
{
clrscr();
printf("Enter Password >>> ");
fflush(stdin);
gets(password);
}while((strcmp(password, PWD)) != 0);
}

void emp_menu(void)
{
clrscr();
printf("MENU\n");
printf(" ----\n");
printf("[1] : Add Employee\n");
printf("[2] : Delete Employee\n");
printf("[3] : Edit Employee\n");
printf("[4] : Search Employee\n");
printf("[5] : Go Back\n\n");
printf(" >>> ");
}

void exit_message(void)
{
clrscr();
printf("THANK YOU!\n");
printf(">>> ");
}