#include <stdio.h> 
#include <string.h> #define MAX 5  // Maximum number of books in the 
library (stack size) 
// Structure to represent a book 
struct Book { 
int book_id; 
char title[50]; 
char author[50]; 
}; 
// Stack to hold books 
struct Book stack[MAX]; 
int top = -1;  // Stack initialization 
// Function to add a book to the stack 
void add_book(struct Book book) { 
if (top >= MAX - 1) { 
printf("Stack Overflow! Cannot add more books.\n");     
} else { 
top++; 
stack[top] = book; 
printf("Book '%s' added to the library.\n", book.title);     
} 
} 
// Function to issue a book (pop from stack) 
void issue_book() { 
if (top == -1) { 
printf("No books available to issue.\n");     
} else { 
printf("Book '%s' has been issued.\n", stack[top].title); 
top--;  // Remove the book from the stack     
} 
} 
// Function to return a book (push to stack) 
void return_book(struct Book book) { 
if (top >= MAX - 1) { 
printf("Stack Overflow! Cannot return more books.\n");     
} else { 
top++; 
stack[top] = book; 
printf("Book '%s' returned successfully.\n", book.title);     
} 
} 
// Function to display all books in the library (stack) 
void view_books() { 
if (top == -1) { 
printf("No books available in the library.\n");     
} else { 
printf("Books available in the library:\n"); 
for (int i = top; i >= 0; i--) { 
printf("ID: %d, Title: %s, Author: %s\n", stack[i].book_id, stack[i].title, 
stack[i].author);         
} 
} 
} 
// Main function to drive the program 
int main() { 
struct Book book1 = {1, "C Programming", "Dennis Ritchie"}; 
struct Book book2 = {2, "Data Structures", "Robert Lafore"}; 
struct Book book3 = {3, "Algorithms", "Thomas H. Cormen"}; 
int choice; 
do { 
printf("\nLibrary Management System\n"); 
printf("1. Add Book\n"); 
printf("2. Issue Book\n"); 
printf("3. Return Book\n"); 
printf("4. View Books\n"); 
printf("5. Exit\n"); 
printf("Enter your choice: "); 
scanf("%d", &choice); 
switch(choice) { 
case 1:                 
add_book(book1); 
break; 
case 2:                 
issue_book(); 
break; 
case 3:                 
return_book(book2); 
break; 
case 4:                 
view_books(); 
break; 
case 5: 
printf("Exiting program.\n"); 
break; 
default: 
printf("Invalid choice! 
Please try again.\n");         
!= 5); 
return 0; 
}

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