Employee file.c

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

struct emp {
    char name[50];
    float salary;
    int age;
    int id;
};
struct emp e;
  

long int size = sizeof(e);
  

COORD cord = { 0, 0 };
  

void gotoxy(int x, int y)
{
    cord.X = x;
    cord.Y = y;
    SetConsoleCursorPosition(
        GetStdHandle(STD_OUTPUT_HANDLE),
        cord);
}
  
FILE *fp, *ft;
  

void addrecord()
{
    system("cls");
    fseek(fp, 0, SEEK_END);
    char another = 'y';
  
    while (another == 'y') {
        printf("\nEnter Name : ");
        scanf("%s", e.name);
  
        printf("\nEnter Age : ");
        scanf("%d", &e.age);
  
        printf("\nEnter Salary : ");
        scanf("%f", &e.salary);
  
        printf("\nEnter EMP-ID : ");
        scanf("%d", &e.id);
  
        fwrite(&e, size, 1, fp);
  
        printf("\nWant to add another"
               " record (Y/N) : ");
        fflush(stdin);
  
        scanf("%c", &another);
    }
}
  

void deleterecord()
{
    system("cls");
    char empname[50];
    char another = 'y';
  
    while (another == 'y') {
        printf("\nEnter employee "
               "name to delete : ");
        scanf("%s", empname);
  
        ft = fopen("temp.txt", "wb");
        rewind(fp);
  
        while (fread(&e, size,
                     1, fp)
               == 1) {
            if (strcmp(e.name,
                       empname)
                != 0)
                fwrite(&e, size, 1, ft);
        }
  
        fclose(fp);
        fclose(ft);
        remove("data.txt");
        rename("temp.txt", "data.txt");
        fp = fopen("data.txt", "rb+");
  
        printf("\nWant to delete another"
               " record (Y/N) :");
        fflush(stdin);
        
    }
}
  

void displayrecord()
{
    system("cls");
  
    
    rewind(fp);
  
    printf("\n========================="
           "==========================="
           "======");
    printf("\nNAME\t\tAGE\t\tSALARY\t\t"
           "\tID\n",
           e.name, e.age,
           e.salary, e.id);
    printf("==========================="
           "==========================="
           "====\n");
  
    while (fread(&e, size, 1, fp) == 1)
        printf("\n%s\t\t%d\t\t%.2f\t%10d",
               e.name, e.age, e.salary, e.id);
  
    printf("\n\n\n\t");
    system("pause");
}
  

void modifyrecord()
{
    system("cls");
    char empname[50];
    char another = 'y';
  
    while (another == 'y') {
        printf("\nEnter employee name"
               " to modify : ");
        scanf("%s", empname);
  
        rewind(fp);
  
        
        while (fread(&e, size, 1, fp) == 1) {
            
            if (strcmp(e.name, empname) == 0) {
                printf("\nEnter new name:");
                scanf("%s", e.name);
                printf("\nEnter new age :");
                scanf("%d", &e.age);
                printf("\nEnter new salary :");
                scanf("%f", &e.salary);
                printf("\nEnter new EMP-ID :");
                scanf("%d", &e.id);
  
                fseek(fp, -size, SEEK_CUR);
                fwrite(&e, size, 1, fp);
                break;
            }
        }
  
       
        printf("\nWant to modify another"
               " record (Y/N) :");
        fflush(stdin);
        scanf("%c", &another);
    }
}
  

int main()
{
    int choice;
  
    
    fp = fopen("data.txt", "rb+");
  
    
    if (fp == NULL) {
        fp = fopen("data.txt", "wb+");
        if (fp == NULL) {
            printf("\nCannot open file...");
            exit(1);
        }
    }
  
    system("Color 3F");
    printf("\n\n\n\n\t\t\t\t============="
           "============================="
           "===========");
    printf("\n\t\t\t\t~~~~~~~~~~~~~~~~~~~"
           "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
           "~~~~~");
    printf("\n\t\t\t\t==================="
           "============================="
           "=====");
    printf("\n\t\t\t\t[|:::>:::>:::>::>  "
           "EMPLOYEE RECORD  <::<:::<:::"
           "<:::|]\t");
    printf("\n\t\t\t\t==================="
           "============================="
           "=====");
    printf("\n\t\t\t\t~~~~~~~~~~~~~~~~~~~~"
           "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
           "~~~");
    printf("\n\t\t\t\t====================="
           "==============================\n");
    printf("\n\n\n\t\t\t\t\t\t\t\t\t\t"
           "Developer : @Gowtham"
           "\n\n\t\t\t\t");
  
    system("pause");
  
    while (1) {
       
        system("cls");
        gotoxy(30, 10);
        printf("\n1. ADD RECORD\n");
        gotoxy(30, 12);
        printf("\n2. DELETE RECORD\n");
        gotoxy(30, 14);
        printf("\n3. DISPLAY RECORDS\n");
        gotoxy(30, 16);
        printf("\n4. MODIFY RECORD\n");
        gotoxy(30, 18);
        printf("\n5. EXIT\n");
        gotoxy(30, 20);
        printf("\nENTER YOUR CHOICE...\n");
        fflush(stdin);
        scanf("%d", &choice);
  
        
        switch (choice) {
        case 1:
  
           
            addrecord();
            break;
  
        case 2:
  
           
            deleterecord();
            break;
  
        case 3:
  
            
            displayrecord();
            break;
  
        case 4:
  
            
            modifyrecord();
            break;
  
        case 5:
            fclose(fp);
            exit(0);
            break;
  
        default:
            printf("\nINVALID CHOICE...\n");
        }
    }
  
    return 0;
}