题解 | #牛牛的书#

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

typedef struct {
    char name[100];
    int price;
} Book;

int compare(const void *a, const void *b) {
    return ((Book *)a)->price - ((Book *)b)->price;
}

int main() {
    int n;
    scanf("%d", &n);
    Book books[n];

    for (int i = 0; i < n; i++) {
        scanf("%s%d", books[i].name, &books[i].price);
    }

    // 使用标准库函数qsort按价格升序排序书籍
    qsort(books, n, sizeof(Book), compare);

    // 输出按价格升序排序后的书名
    for (int i = 0; i < n; i++) {
        printf("%s\n", books[i].name);
    }

    return 0;
}