C语言大作业图书管理系统

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define N 100

typedef struct Books {
    char num[20];
    char name[20];
    char author[20];
    int price;
    int total;
    char introduce[50];

}BK;
BK bk[N];

void inputBk(BK *p, int i);
void deleteBK(char bkNum[]);
void judge(int jdg);
void sortInfo(BK bk[], int n);
void swapInfo(BK *p, BK *q);
void outputInfo(BK *p);
void updateInfo(char bkNum[]);
void serchInfo(char bkNum[]);

int i, tmp=0, flag = 1, menu;
void main() {

    while (flag) {
        do {
            printf("############################################菜单栏######################################\n");
            printf("请输入想要实现的功能选项\n");
            printf("1、录入新书籍\n");
            printf("2、删除指定书籍\n");
            printf("3、价格从小到大排序书籍\n");
            printf("4、修改指定书籍\n");
            printf("5、查询指定书籍\n");
            printf("6、退出菜单栏\n");
            printf("############################################菜单栏######################################\n");
            printf("请输入选项：");
            scanf_s("%d", &menu);
        } while (menu>6 || menu<1);

        judge(menu);

    }
    getchar(); getchar(); getchar();
}

void judge(int jdg) {
    int n;
    char bkNum[20];
    switch (jdg) {
    case 1:

        printf("请输入要录入书籍的个数：");
        scanf_s("%d", &n);
        for (i = tmp; i<n + tmp; i++) {
            inputBk(&bk[i], i);
        }
        tmp = n + tmp;//tmp很关键，记录数量避免多次添加，前面数据被覆盖
        break;
    case 2:
        printf("请输入要删除的书号：");

        scanf("%s", bkNum);
        deleteBK(bkNum);
        break;
    case 3:
        sortInfo(bk,tmp);
        printf("排序后：\n");
        for (i = 0; i < tmp; i++) {
            outputInfo(&bk[i]);
        }
        break;
    case 4:
        printf("请输入要修改的书号：");

        scanf("%s", bkNum);
        updateInfo(bkNum);
        break;
    case 5:
        printf("请输入要查询的书号：");
        scanf("%s", bkNum);
        serchInfo(bkNum);
        break;
    case 6:
        flag = 0;
        break;
    }

}

void inputBk(BK *p, int i) {

    printf("请录入第%d本书：\n",i+1);
    printf("请输入书号：");
    scanf("%s",p->num);
    printf("请输入书名：");
    scanf("%s", p->name);
    printf("请输入作者：");
    scanf("%s", p->author);
    printf("请输入单价：");
    scanf_s("%d", &(p->price));
    printf("请输入数量：");
    scanf_s("%d", &(p->total));
    printf("请输入简介：");
    scanf("%s", p->introduce);

}
void deleteBK(char bkNum[]) {

    int assert=0;
    for (i = 0; i<tmp; i++) {
        if (strcmp(bkNum, bk[i].num) == 0) {
            for (int j = i; j<tmp - 1; j++) {
                strcpy(bk[j].num ,bk[j + 1].num);
                strcpy(bk[j].name, bk[j + 1].name);
                strcpy(bk[j].author, bk[j + 1].author);
                strcpy(bk[j].introduce, bk[j + 1].introduce);
                bk[j].price = bk[j].price;
                bk[j].total = bk[j].total;

                tmp = tmp - 1;//记录tmp数量
                assert = 1;
                break;
            }
        }
    }

    if (assert) {
        printf("已经删除该书籍信息\n");
    }else {
        printf("没有找到该书籍\n");
    }

}
void sortInfo(BK bk[],int n) {
    int i, j;
    for (i = 0; i < n - 1;i++) {
        for (j = 0; j < n - 1-i;j++) {
            if (bk[j].price > bk[j+1].price) {
                swapInfo(&bk[j],&bk[j+1]);
            }
        }
    }

}
void swapInfo(BK *p,BK *q) {
    BK trmp;
    trmp = *p; *p = *q; *q = trmp;
}
void outputInfo(BK *p) {

        printf("%s\t%s\t%s\t%d\t%d\t%s\n", p->num, p->name, p->author, p->price, p->total, p->introduce);

}

void updateInfo(char bkNum[]) {

    int assert = 0;
    for (i = 0; i<tmp; i++) {
        if (strcmp(bkNum, bk[i].num) == 0) {

            printf("请修改图书馆第%d本书：\n", i + 1);
            printf("请修改书号：");
            scanf("%s", bk[i].num);
            printf("请修改书名：");
            scanf("%s", bk[i].name);
            printf("请修改作者：");
            scanf("%s", bk[i].author);
            printf("请修改单价：");
            scanf_s("%d", &(bk[i].price));
            printf("请修改数量：");
            scanf_s("%d", &(bk[i].total));
            printf("请修改简介：");
            scanf("%s", bk[i].introduce);

            assert = 1;
            break;

        }
    }

    if (assert) {
        printf("已经修改该书籍信息\n");
    }
    else {
        printf("没有找到该名称书籍\n");
    }

}
void serchInfo(char bkNum[]) {

    int assert = 0;
    for (i = 0; i<tmp; i++) {
        if (strcmp(bkNum, bk[i].num) == 0) {
            outputInfo(&bk[i]);

            assert = 1;
            break;

        }
    }

    if (assert) {
        printf("已经查询到该书籍信息\n");
    }
    else {
        printf("没有找到该名称的书籍\n");
    }

}