基於線性表的圖書管理系統——順序表
阿新 • • 發佈：2019-02-01
第一篇原創
，程式碼寫的不忍直視.....不過還好把它做出來啦
。不多說，上程式碼
#include <iostream> #include <fstream> #include <string> #define MAXSIZE 1000000 using namespace std; char s0[10],s1[10],s2[10]; //存放3個標題性資訊 int flag = 0; //圖書資訊讀取標記 int num; //記錄圖書個數 float ave; //記錄所有書平均價格 typedef struct Book { char no[20]; char name[50]; float price; }Book; typedef struct SqList { Book *elem; int length; }Sqlist; SqList book; void CreatSqList(SqList &book) { book.elem = new Book[MAXSIZE]; book.length = 0; } void Input() { int i = 0; ifstream inFile("book.txt"); if(!inFile) { cout << "Can't open this file!!" << endl; exit(1); } else { inFile >> s0 >> s1 >> s2; //ISBN 書名 定價 while(!inFile.eof()) { inFile >> book.elem[i].no >> book.elem[i].name >> book.elem[i].price; i++; num = i; } inFile.close(); flag = 1; cout << "讀取完畢！" << endl; } } void Output() { int i = 0; if(flag==0) { cout << "還未讀取圖書！！！" << endl; } else { cout << "書號 書名 價格：" << '\n'; while(i<num) { cout << book.elem[i].no << "\t" << book.elem[i].name << "\t" << book.elem[i].price << endl; i++; } cout << endl << "資訊顯示完畢!" << endl; } } void OutputN() { cout << "圖書個數為：" << num << endl; } void OutputM() { int i; Book b; if(flag==0) { cout << "還未讀取圖書！！！" << endl; } cout << "價格最高圖書資訊為：" << endl; cout << "書號 書名 價格：" << '\n'; for(i=0;i<num-1;i++) { if(book.elem[i].price>book.elem[i+1].price) { b = book.elem[i]; book.elem[i] = book.elem[i+1]; book.elem[i+1] = b; } } for(i=0;i<num;i++) { if(book.elem[i].price == book.elem[num-1].price) { cout << book.elem[i].no << "\t" << book.elem[i].name << "\t" << book.elem[i].price << endl; } } } void Average() { int i; float sum = 0; if(flag==0) { cout << "還未讀取圖書！！！" << endl; } for(i=0;i<num;i++) { sum = sum + book.elem[i].price; } ave = sum/num; cout << "平均價格為：" << ave << endl; } void SearchN() { int i; int n = 0; //記錄相同書名圖書個數 char NAME[20]; if(flag==0) { cout << "還未讀取圖書！！！" << endl; } cout << "請輸入需要查詢的書名：" ; cin >> NAME; cout << endl; for(i=0;i<num;i++) { //字串比較函式strcmp if(strcmp(book.elem[i].name,NAME) == 0) { cout << "書名 書號 價格：" << endl; cout << book.elem[i].name << "\t" << book.elem[i].no << "\t" << book.elem[i].price << endl; n = n + 1; } } if(n==0) { cout << "沒有您需要的圖書！" << endl; } while(i<num) { cout << book.elem[i].no << "\t" << book.elem[i].name << "\t" << book.elem[i].price << endl; i++; } } void SearchP() { int p; if(flag==0) { cout << "還未讀取圖書！！！" << endl; } cout << "請輸入需要查詢圖書的位置："; cin >> p; cout << endl; ifstream inFile("book.txt"); inFile >> s0 >> s1 >> s2; //ISBN 書名 定價 for(int i=0;!inFile.eof();i++) { inFile >> book.elem[i].no >> book.elem[i].name >> book.elem[i].price; num = i; } inFile.close(); if(p<1 || p>num) { cout << "位置輸入錯誤！" << endl; } else { cout << "該圖書資訊為：" << "書號 書名 價格：" << endl; cout << book.elem[p-1].no << "\t" << book.elem[p-1].name << "\t" << book.elem[p-1].price << endl; } } void Insert() { int i; //位置 int j; Book bk; //插入的圖書 if(flag==0) { cout << "還未讀取圖書！！！" << endl; } cout << "請輸入插入位置："; cin >> i; cout << endl; cout << "請輸入書號："; cin >> bk.no; cout << "請輸入書名："; cin >> bk.name; cout << "請輸入價格："; cin >> bk.price; ifstream inFile("book.txt"); inFile >> s0 >> s1 >> s2; //ISBN 書名 定價 for(i=0;!inFile.eof();i++) { inFile >> book.elem[i].no >> book.elem[i].name >> book.elem[i].price; num = i; } inFile.close(); if(i<1 || i>num+1) { cout << "插入位置錯誤！" << endl; } if(num == MAXSIZE) { cout << "沒有位置可以插入！" << endl; } if(1<i && i<=num+1 && num != MAXSIZE) { for(j=num-1;j>=i-1;j--) { book.elem[j+1] = book.elem[j]; } book.elem[i-1] = bk; ++num; ++book.length; } ofstream outFile("book.txt"); outFile << s0 << "\t" << s1 << "\t" << s2 << endl; for(j=0;j<num;j++) { outFile << book.elem[j].no << "\t" << book.elem[j].name << "\t" << book.elem[j].price << endl; } } void Delete() { int i; //位置 int j; if(flag==0) { cout << "還未讀取圖書！！！" << endl; } ifstream inFile("book.txt"); inFile >> s0 >> s1 >> s2; //ISBN 書名 定價 for(j=0;!inFile.eof();j++) { inFile >> book.elem[j].no >> book.elem[j].name >> book.elem[j].price; num = j; } inFile.close(); cout << "請輸入將要刪除圖書的位置："; cin >> i; if(i<1||i>num) { cout << "位置輸入錯誤！" << endl; } else { for(j=i;j<=num-1;j++) { book.elem[j-1] = book.elem[j]; } --num; --book.length; ofstream outFile("book.txt"); outFile << s0 << "\t" << s1 << "\t" << s2 << endl; for(j=0;j<num;j++) { outFile << book.elem[j].no << "\t" << book.elem[j].name << "\t" << book.elem[j].price << endl; } } } void Reverse() { //逆序輸出 int i,j; Book bk; if(flag==0) { cout << "還未讀取圖書！！！" << endl; } ifstream inFile("book.txt"); inFile >> s0 >> s1 >> s2; //ISBN 書名 定價 for(j=0;!inFile.eof();j++) { inFile >> book.elem[j].no >> book.elem[j].name >> book.elem[j].price; num = j+1; } inFile.close(); for(i=0;i<num/2;i++) { bk = book.elem[i]; book.elem[i] = book.elem[num-i-1]; book.elem[num-i-1] = bk; } ofstream outFile("book_inverser.txt"); outFile << s0 << "\t" << s1 << "\t" << s2 << endl; for(i=0;i<num;i++) { outFile << book.elem[i].no << "\t" << book.elem[i].name << "\t" << book.elem[i].price << endl; } cout << "完畢！請輸入數字繼續：" << endl; } void Ascende() { //升序輸出 int i,j; Book bk; if(flag==0) { cout << "還未讀取圖書！！！" << endl; } ifstream inFile("book.txt"); inFile >> s0 >> s1 >> s2; //ISBN 書名 定價 for(j=0;!inFile.eof();j++) { inFile >> book.elem[j].no >> book.elem[j].name >> book.elem[j].price; num = j+1; } inFile.close(); for(i=0;i<num;i++) { for(j=0;j<num-i-1;j++) { if(book.elem[j].price > book.elem[j+1].price) { bk = book.elem[j]; book.elem[j] = book.elem[j+1]; book.elem[j+1] = bk; } } } ofstream outFile("book_sort.txt"); outFile << s0 << "\t" << s1 << "\t" << s2 << endl; for(i=0;i<num;i++) { outFile << book.elem[i].no << "\t" << book.elem[i].name << "\t" << book.elem[i].price << endl; } cout << "完畢！請輸入數字繼續：" << endl; } int main() { int n; CreatSqList(book); while(1) { cout << "************************************************************************" << endl; cout << " | 歡迎進入圖書管理系統~! |" << endl; cout << " | |" << endl; cout << " | 請輸入數字選擇服務： |" << endl; cout << " | 1.讀入圖書資訊 |" << endl; cout << " | 2.顯示圖書資訊 |" << endl; cout << " | 3.輸出表中圖書個數 |" << endl; cout << " | 4.輸出價格最高圖書 |" << endl; cout << " | 5.輸出圖書的平均價格 |" << endl; cout << " | 6.根據書名查詢圖書 |" << endl; cout << " | 7.根據位置查詢圖書 |" << endl; cout << " | 8.插入圖書 |" << endl; cout << " | 9.刪除指定圖書 |" << endl; cout << " | 10.逆序輸出圖書 |" << endl; cout << " | 11.升序輸出圖書 |" << endl; cout << " | 0.退出系統 |" << endl; cout << "***********************************************************************" << endl << endl; cin >> n; switch(n) { case 1:Input();break; case 2:Output();break; case 3:OutputN();break; case 4:OutputM();break; case 5:Average();break; case 6:SearchN();break; case 7:SearchP();break; case 8:Insert();break; case 9:Delete();break; case 10:Reverse();break; case 11:Ascende();break; case 0:cout << "歡迎再次使用~" << endl; exit(0); default: cout << "請選擇正確的操作！！！" << endl; break; } } return 0; }