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Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Please answer it according to the code below #include #define MAX_EMP 5 struct Employee { int id; int age; float salary; }; int count = 0; struct Employee emp[MAX_EMP]; void display() { printf("\n---=== EMPLOYEE DATA ===---\n"); printf("EMP ID\tEMP AGE\tEMP SALARY\n"); printf("======\t=======\t==========\n"); for(int i = 0; i < count; i++) { printf("%d\t%d\t%.2f\n", emp[i].id, emp[i].age, emp[i].salary); } } void add() { if(count == MAX_EMP) { printf("\nERROR!!! Maximum Number of Employees Reached\n"); return; } printf("\nAdding Employee ===============\n"); printf("Enter Employee ID: "); scanf("%d", &emp[count].id); printf("Enter Employee Age: "); scanf("%d", &emp[count].age); printf("Enter Employee Salary: "); scanf("%f", &emp[count].salary); count++; } void update() { int id, found = 0; float newSalary; printf("\nUpdate Employee Salary ======================\n"); printf("Enter Employee ID: "); scanf("%d", &id); for(int i = 0; i < count; i++) { if(emp[i].id == id) { found = 1; printf("The current salary is %.2f\n", emp[i].salary); printf("Enter Employee New Salary: "); scanf("%f", &newSalary); emp[i].salary = newSalary; break; } } if(!found) { printf("* ERROR: Employee ID not found! *\n"); } } void Remove() { int id, found = 0, index; printf("\nRemove Employee ===============\n"); printf("Enter Employee ID: "); scanf("%d", &id); for(int i = 0; i < count; i++) { if(emp[i].id == id) { found = 1; index = i; break; } } if(!found) { printf("* ERROR: Employee ID not found! *\n"); return; } for(int i = index; i < count-1; i++) { emp[i] = emp[i+1]; } count--; printf("Employee %d will be removed\n", id); } int main() { int choice; while(1) { printf("\n1. Display Employee Information\n"); printf("2. Add Employee\n"); printf("3. Update Employee Salary\n"); printf("4. Remove Employee\n"); printf("0. Exit\n"); printf("\nEnter choice: "); scanf("%d", &choice); switch(choice) { case 0: printf("Exiting Employee Data Program. Good Bye!!!"); return 0; case 1: display(); break; case 2: add(); break; case 3: update(); break; case 4: Remove(); break; default: printf("ERROR: Incorrect Option: Try Again"); } } return 0; }

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