Примерно так:| Код | #include <stdio.h>
#include <string.h>
#define BOOKS_MAX 10
struct Book_struct
{
char author[20];
char title[20];
unsigned year;
};
typedef struct Book_struct Book;
void inputBook(Book *book)
{
printf("Input book author: ");
scanf("%20s", book->author);
printf("Input book title: ");
scanf("%20s", book->title);
printf("Input year: ");
scanf("%u", &book->year);
}
int showMenu(void)
{
int result = -1;
do {
printf("\n1. Input book\n");
printf("2. Print books\n");
printf("3. Find book by author\n");
printf("4. Delete book by year\n");
printf("\n0. Quit\n\n");
printf("Make your selection: ");
scanf("%d", &result);
}while((result >= 0) && (result < 5))
return result;
}
void printBook(const Book *book)
{
printf("Title: %s\n", book->title);
printf("Author: %s\n", book->author);
printf("Year: %u\n\n", book->year);
}
void findBooksByAuthor(const Book *books, unsigned count)
{
char author[20];
printf("Input author's name: ");
scanf("%20s", author);
while(count) {
if ( strcmp(books->author, author) == 0)
printBook(books);
++books;
--count;
}
}
unsigned deleteBooksByYear(Book *books, unsigned count)
{
unsigned year;
unsigned i;
printf("Input year: ");
scanf("%u", &year);
for(i = 0; i < count; ++i) {
if ( books[i].year == year) {
if (i + 1 < count)
memmove(books + i, books + count - 1, sizeof(*book));
--count;
if (--i == 0)
break;
}
}
return count;
}
int main()
{
Book books[BOOKS_MAX];
unsigned books_count = 0;
unsigned i;
while(1) {
switch( showMenu() ) {
case 0:
return 0; /* выход из программы */
case 1:
if (books_count < BOOKS_MAX) {
inputBook(books + books_count);
++books_count;
} else
printf("Already entered maximum number of books\n");
break;
case 2:
for(i = 0; i < books_count; ++i)
printBook(book + i);
break;
case 3:
findBooksByAthor(books, books_count);
break;
case 4:
books_count = deleteBooksByYear(books, books_count);
break;
}
}
return 0;
} |
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