Write a menu driven program in 'C' that shows the working of a library.The menu option should be - Add book information. - Display book information. - List all books of given author. - List the count of books in the library. - Exit. (Using Structure Array)

#include
struct book
{
    int  b_no;
    char b_name[40];
    char b_author[40];
    int  no_pages;
};
void main()
{
    struct book b[20];
    int    ch,n,i,count = 0;
    char   temp[40];
    clrscr();
    do
    {
        printf("\nPRESS 1.TO ADD BOOK INFORMATION.");
        printf("\nPRESS 2.TO DISPALY BOOK INFORMATION.");
        printf("\nPRESS 3.TO DISPLAY BOOK OF GIVEN AUTHOR.");
        printf("\nPRESS 4.TO COUNT NUMBER OF BOOK.");
        printf("\nPRESS 5.TO EXIT.");
        printf("\nENTER YOUR CHOICE::");
        scanf("%d",&ch);
        switch(ch)
        {
        case 1:
            printf("\nHOW MANY RECORDS U WANT ::  ");
            scanf("%d",&n);
            for(i = 0 ; i < n ; i++)
            {
                printf("ENTER BOOK NO. ::> ");
                scanf("%d",&b[i].b_no);
                printf("ENTER BOOK NAME ::> ");
                scanf("%s",b[i].b_name);
                printf("ENTER AUTHOR NAME  ::> ");
                scanf("%s",b[i].b_author);
                printf("ENTER NO. OF PAGES ::> ");
                scanf("%d",&b[i].no_pages);
            }
            break;
        case 2:
            printf("\nALL BOOK INFORMATION::>");
            for( i = 0 ; i < n ; i++)
            {
              printf("\n%d\t%s\t%s\t%d",b[i].b_no,b[i].b_name,b[i].b_author,                            b[i].no_pages);
            }
            break;

        case 3:
            printf("\nENTER THE AUTHOR NAME :: >\n");
            scanf("%s",temp);
            for( i = 0 ; i < n ; i++)
            {
                if(strcmp(b[i].b_author,temp) == 0)
                {
                    printf("\n%s",b[i].b_name);
                }
            }
            break;
        case 4 :
            for( i = 0 ; i < n ; i++)
            {
                count++;
            }
             printf("\nTOTAL NUMBER OF BOOKS IN LIBRARY :: >  %d",count);
            break;
        case 5 :
            exit(0);
        }
    }while(ch != 5);
    getch();
}