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

struct employee {
int id;
char name[25];
char dept[25];
int sal;
int age;
};

void read(struct employee e[],int size)
{
    for(int i=0;i<size;i++)
        {
     printf("\nDetails of Employee %d:",i+1);
     printf("\nEnter an Employee id: ");
     scanf("%d",&e[i].id);
     printf("Enter an Employee Name: ");
     scanf("%s",e[i].name);
     printf("Enter an Employee Deptartment {IN CAPS}: ");
     scanf("%s",e[i].dept);
     printf("Enter an Employee Salary: ");
     scanf("%d",&e[i].sal);
     printf("Enter an Employee age: ");
     scanf("%d",&e[i].age);
    }

}

void displayAll(struct employee e[],int size,FILE *ptr) {
    for(int i=0;i<size;i++) {
        printf("Details of Employee %d:\n",i+1);
        printf("Id:%d\nName:%s\nDepartment:%s\nSalary:%d\nAge:%d\n",e[i].id,e[i].name,e[i].dept,e[i].sal,e[i].age);
        fprintf(ptr,"Details of Employee %d:\n",i+1);
        fprintf(ptr,"Id:%d\nName:%s\nDepartment:%s\nSalary:%d\nAge:%d\n",e[i].id,e[i].name,e[i].dept,e[i].sal,e[i].age);
    }
    printf("Result written to 'employeeRecord.txt' is successful.\n");
}

void search(struct employee e[],char department[],int size,FILE *ptr) {
    for(int i=0;i<size;i++)
        {
        if(strcmp(department,e[i].dept)==0) {
           fprintf(ptr,"Details of Employee %d:\n",i+1);
           fprintf(ptr,"Id:%d\nName:%s\nDepartment:%s\nSalary:%d\nAge:%d\n",e[i].id,e[i].name,e[i].dept,e[i].sal,e[i].age);
           printf("Details of Employee %d:\n",i+1);
           printf("Id:%d\nName:%s\nDepartment:%s\nSalary:%d\nAge:%d\n",e[i].id,e[i].name,e[i].dept,e[i].sal,e[i].age);
           printf("Result written to 'employeeRecord.txt' is successful.\n");
                }
            else
                printf("Entered Department is not found.\n");
        }
}

int main()
{
    FILE *ptr;
    int n;
    printf("Enter the Number of employee:");
    scanf("%d",&n);
    struct employee e[n];
    read(e,n);
    ptr=fopen("employeeRecord.txt","w+");
    if(ptr==NULL) {
        printf("Error in opening file!\n");
        return 1;
    }
    int choice;
    printf("If you want to display all Employee Record Enter 1 Else 2 for search employee by Department:");
    scanf("%d",&choice);
    if(choice==1)
        displayAll(e,n,ptr);
    else if(choice==2) {
    char department[25];
    printf("\nEnter the Department {IN CAPS}: ");
    scanf("%s",department);
    search(e,department,n,ptr);
    }
    fclose(ptr);

    return 0;
}