Employee Payroll System

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

/* structure to store employee salary details */
struct employee {
    int empId;
    char name[255];
    int basic, bonus;
    int absent, salaryDeduc;
    float gross, net;
};

/* prints payslip for the requested employee */
void printSalary(struct employee e1) {
    time_t tm;
    time(&tm);
    printf("\n\t\t************************************************");
    printf("\n\t\t*           EMPLOYEE PAYROLL SYSTEM            *");
    printf("\n\t\t************************************************\n");
    printf("\n\t\tDate: \t\t\t %s", ctime(&tm));
    printf("\n\t\tName: \t\t\t %s", e1.name);
    printf("\n\t\tEmployee ID: \t\t %d", e1.empId);
    printf("\n\n\t\tBasic Salary: \t\t %d", e1.basic);
    printf("\n\t\tBonus: \t\t\t %d", e1.bonus);
    printf("\n\t\t------------------------------------------------");
    printf("\n\t\tGross Salary: \t\t %.2f PHP", e1.gross);
    printf("\n\t\t------------------------------------------------\n");
    printf("\n\n\t\tDeductions (4%% per absent)");
    printf("\n\t\tSalary Deduction: (Absent * 0.04) x Basic Salary");
    printf("\n\t\tSalary Deduction: \t %d", e1.salaryDeduc);
    printf("\n\t\t------------------------------------------------");
    printf("\n\t\tNet Salary: \t\t %.2f PHP", e1.net);
    printf("\n\t\t------------------------------------------------\n\n");
    return;
}

/* display all the employee records entered */
void display(struct employee e1) {
    printf("\n\t\t____________________________________________\n");
    printf("\n\t\tEmployee ID: \t\t %d", e1.empId);
    printf("\n\t\t--------------------------------------------\n");
    printf("\t\tEmployee Name: \t %s", e1.name);
    printf("\n\t\tBasic Salary: \t %d", e1.basic);
    printf("\n\t\tBonus: \t\t %d", e1.bonus);
    printf("\n\t\tAbsent: \t %d", e1.absent);
    return;
}

int main() {
    int i, ch, num, flag, empID;
    int choice, update, updateChoice;
    struct employee *e1;

    /* get the number of employees from the user  */
    printf("Enter the number of employees:");
    scanf("%d", &num);

    /* dynamically allocate memory to store employee salary details */
    e1 = (struct employee *)malloc(sizeof(struct employee) * num);

    /* get the employee salary details from the customer */
    printf("Enter your input for every employee:\n");
    for (i = 0; i < num; i++) {
            printf("Employee ID:");
            scanf("%d", &(e1[i].empId));
            getchar();
            printf("Employee Name:");
            fgets(e1[i].name, 255, stdin);
            e1[i].name[strlen(e1[i].name) - 1] = '\0';
            printf("Basic Salary:");
            scanf("%d", &(e1[i].basic));
            printf("Bonus:");
            scanf("%d", &(e1[i].bonus));
            printf("Enter the deductions: \n");
            printf("Absent: ");
            scanf("%d", &(e1[i].absent));
            printf("\n");
    }

    /* printing payslip for the given employee ID */
    while (1) {

            printf("\n   EMPLOYEE PAYROLL SYSTEM \n");
            printf("\n\n*****CHOOSE YOUR OPTION*****\n");
            printf("1) SHOW ALL RECORDS\n");
            printf("2) ADD NEW EMPLOYEE RECORD\n");
            printf("3) PRINT THE SALARY SLIP\n");
            printf("4) EXIT\n");
            printf("Enter your choice : ");
            scanf("%d", &choice);

            switch(choice){
                    case 1 : /*printing all the records entered before printing the slip */
                                    printf("\nEmp. ID. Emp.Name \t Basic \t HRA \t DA \t MA \t PF \t Insurance \n") ;

                                    for (i = 0; i < num; i++) {
                                            display(e1[i]);
                                    }
                                    break;

                    case 2 : /*adding a new member in the employee list created */
                                    num++;
                                    i = num-1;
                                    printf("Employee ID:");
                                    scanf("%d", &(e1[i].empId));
                                    getchar();
                                    printf("Employee Name:");
                                    fgets(e1[i].name, 255, stdin);
                                    e1[i].name[strlen(e1[i].name) - 1] = '\0';
                                    printf("Basic Salary:");
                                    scanf("%d", &(e1[i].basic));
                                    printf("Bonus:");
                                    scanf("%d", &(e1[i].bonus));
                                    printf("Enter the deductions: \n");
                                    printf("Absent: ");
                                    scanf("%d", &(e1[i].absent));
                                    printf("\n");
                                    break;

                    case 3 :        /* gross and net salary calculation */
                                    for (i = 0; i < num; i++) {
                                            e1[i].gross = e1[i].basic + e1[i].bonus;
                                            e1[i].salaryDeduc = (0.04 * e1[i].absent) * e1[i].basic;
                                            e1[i].net = e1[i].gross - e1[i].salaryDeduc;
                                    }

                                    printf("Enter employee ID to get payslip:");
                                    scanf("%d", &empID);

                                    flag = 0;
                                    for (i = 0; i < num; i++) {
                                            if (empID == e1[i].empId) {
                                                    printSalary(e1[i]);
                                                    flag = 1;
                                            }
                                    }

                                    if (!flag) {
                                            printf("No Record Found!!\n");
                                    }
                                    break;

                    case 4 :
                            exit(0);
                            break;

                    default: printf("error");
            }

            printf("\n\t\tPress any key to go back in Main Menu...");
            getch();
    }
    return 0;
}