求助大佬 一道结构题

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

struct book
{
    char name[50];
    float price;
    int classification;
};

int bookcmp( const void* a, const void* b )
{
    const struct book* p = (const struct book*)a;
    const struct book* q = (const struct book*)b;

    if( p->price < q->price ) return -1;
    if( p->price > q->price ) return +1;

    return strcmp(p->name,q->name);
}

int main( void )
{
    struct book books[100];
    size_t n;

    scanf( "%zu", &n );
    for( size_t i=0; i!=n; ++i )
        scanf( "%s%f%d", books[i].name, &books[i].price, &books[i].classification );

    qsort( books, n, sizeof(*books), &bookcmp );

    for( size_t i=0; i!=n; ++i )
        printf( "%s,%.2f,%d\n", books[i].name, books[i].price, books[i].classification );
}