C++图书馆管理系统利用Easyx代码

以下是一个简单的C++图书馆管理系统的Easyx代码，包括添加图书、删除图书、查找图书和显示所有图书等基本功能。

#include <graphics.h>
#include <conio.h>
#include <iostream>
#include <fstream>
#include <cstring>
#include <cstdio>
using namespace std;

#define MAX 1000

struct book {
    char bookname[20];
    char author[10];
    char id[10];
    char publish[20];
    char price[10];
} book[MAX];

int n;

void menu();
void add();
void search();
void show();
void del();
void save();
void read();

int main()
{
    initgraph(640, 480);
    setbkcolor(WHITE);
    cleardevice();
    settextcolor(RED);
    settextstyle(30, 0, "黑体");
    outtextxy(220, 50, "图书管理系统");
    read();
    menu();
    save();
    closegraph();
    return 0;
}

void menu()
{
    cleardevice();
    settextcolor(BLUE);
    settextstyle(20, 0, "楷体");
    outtextxy(50, 80, "1.添加图书");
    outtextxy(50, 130, "2.查找图书");
    outtextxy(50, 180, "3.删除图书");
    outtextxy(50, 230, "4.显示所有图书");
    outtextxy(50, 280, "5.退出系统");
    int i;
    char ch = getch();
    switch(ch) {
        case '1': add(); break;
        case '2': search(); break;
        case '3': del(); break;
        case '4': show(); break;
        case '5': break;
        default: menu(); break;
    }
}

void add()
{
    cleardevice();
    settextcolor(BLUE);
    settextstyle(20, 0, "楷体");
    outtextxy(50, 80, "请输入图书信息：");
    outtextxy(50, 130, "书名：");
    outtextxy(50, 180, "作者：");
    outtextxy(50, 230, "编号：");
    outtextxy(50, 280, "出版社：");
    outtextxy(50, 330, "价格：");
    settextcolor(RED);
    settextstyle(20, 0, "宋体");
    char ch = getch();
    int i;
    for(i = 0; i < MAX; i++) {
        if(book[i].id[0] == '\0') {
            break;
        }
    }
    switch(ch) {
        case '1': 
            cin >> book[i].bookname;
            break;
        case '2':
            cin >> book[i].author;
            break;
        case '3':
            cin >> book[i].id;
            break;
        case '4':
            cin >> book[i].publish;
            break;
        case '5':
            cin >> book[i].price;
            break;
        case 13: 
            n++;
            menu();
            break;
        case 27: 
            menu();
            break;
        default:
            add();
            break;
    }
    add();
}

void search()
{
    cleardevice();
    settextcolor(BLUE);
    settextstyle(20, 0, "楷体");
    outtextxy(50, 80, "请输入要查找的图书编号：");
    settextcolor(RED);
    settextstyle(20, 0, "宋体");
    char ch = getch();
    int i;
    for(i = 0; i < n; i++) {
        if(strcmp(book[i].id, ch) == 0) {
            cout << book[i].bookname << " " << book[i].author << " " << book[i].id << " " << book[i].publish << " " << book[i].price << endl;
            break;
        }
    }
    if(i == n) {
        cout << "未找到该图书，请重新输入！" << endl;
        search();
    } else {
        menu();
    }
}

void show()
{
    cleardevice();
    settextcolor(BLUE);
    settextstyle(20, 0, "楷体");
    outtextxy(50, 80, "所有图书信息如下：");
    settextcolor(RED);
    settextstyle(20, 0, "宋体");
    for(int i = 0; i < n; i++) {
        cout << book[i].bookname << " " << book[i].author << " " << book[i].id << " " << book[i].publish << " " << book[i].price << endl;
    }
    getch();
    menu();
}

void del()
{
    cleardevice();
    settextcolor(BLUE);
    settextstyle(20, 0, "楷体");
    outtextxy(50, 80, "请输入要删除的图书编号：");
    settextcolor(RED);
    settextstyle(20, 0, "宋体");
    char ch = getch();
    int i;
    for(i = 0; i < n; i++) {
        if(strcmp(book[i].id, ch) == 0) {
            for(int j = i; j < n-1; j++) {
                book[j] = book[j+1];
            }
            n--;
            break;
        }
    }
    if(i == n) {
        cout << "未找到该图书，请重新输入！" << endl;
        del();
    } else {
        menu();
    }
}

void save()
{
    ofstream fout("book.txt");
    for(int i = 0; i < n; i++) {
        fout << book[i].bookname << " " << book[i].author << " " << book[i].id << " " << book[i].publish << " " << book[i].price << endl;
    }
    fout.close();
}

void read()
{
    ifstream fin("book.txt");
    while(!fin.eof()) {
        fin >> book[n].bookname >> book[n].author >> book[n].id >> book[n].publish >> book[n].price;
        n++;
    }
    fin.close();
}

此代码仅供参考，可以根据实际情况进行修改和完善。