211.c

// http://www.bjfuacm.com/problem/211/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXSIZE 10000
#define OVERFLOW 11

typedef struct Books Book;
typedef struct SqLists SqList;

struct Books {
    char no[20];
    char name[50];
    float price;
};

struct SqLists {
    struct Books* elem;
    int len;
};

void InitList(SqList* L) {
    L->elem = (Book *)calloc(MAXSIZE, sizeof(Book));
    if (!L->elem) exit(OVERFLOW);
    L->len = 0;
    return;
}

int isValid(SqList* L, int index) {
    return (index <= L->len + 1 && index >= 1);
}

void CopyBook(Book* d, Book* s) {
    strcpy(d->no, s->no);
    strcpy(d->name, s->name);
    d->price = s->price;
}

void ListInsert(SqList* L, int index, Book* p) {
    if (!isValid(L, index)) return;
    if (L->len == MAXSIZE) return;
    for (int i = L->len - 1; i >= index - 1; i--) {
        L->elem[i + 1] = L->elem[i];
    }
    CopyBook(&(L->elem[index - 1]), p);
    L->len += 1;
    return;
}

void ZeroBook(Book* p) {
    memset(p->no, '\0', sizeof(char));
    memset(p->name, '\0', sizeof(char));
    p->price = 0.0;
}


int main() {
    SqList L;
    InitList(&L);
    int amount;
    scanf("%d", &amount);

    for (int i = 0; i < amount; i++) {
        scanf("%s %s %f", L.elem[i].no, L.elem[i].name, &L.elem[i].price);
        L.len += 1;
    }

    int index;
    scanf("%d", &index);
    Book* p = (Book *)malloc(sizeof(Book));
    ZeroBook(p);
    scanf("%s %s %f", p->no, p->name, &p->price);
    if (isValid(&L, index)) {
        ListInsert(&L, index, p);
        for (int i = 0; i < L.len; i++) {
            printf("%s %s %.2f\n", L.elem[i].no, L.elem[i].name, L.elem[i].price);
        }
    } else {
        printf("%s\n", "抱歉，入库位置非法！");
    }
    free(p);
}