封装文件操作类

fileReadWrite.cpp

@@ -3,109 +3,115 @@
 //
 
 #include "fileReadWrite.h"
-#include "io.h"
+#include "iostream"
+#include "string"
 
+/*
 //空构造方法
 fileReadWrite::fileReadWrite() {
-    this->filePath = "";
-    cout << "路径为空,请设置文件路径" << endl;
+    if (filePath.empty()) cout << "路径为空,请设置文件路径" << endl;
+    //初始化一些文件对象，便于openFile使用
+    this->readStream=new ifstream ;
+    this->writeStream=new ofstream ;
+    this->ReadWriteStream=new fstream ;
+
 }
 
 fileReadWrite::fileReadWrite(string path) : filePath(path) {
     if (path.length() == 0) cout << "文件路径为空！";
-}
+}*/
 
-fileReadWrite::fileReadWrite(string path, ofstream *writeStream) :
-        filePath(path), writeStream(writeStream) {
-    if (path.length() == 0) cout << "文件路径为空！";
+fileReadWrite::fileReadWrite(char *path, ofstream *w) :
+        filePath(path), writeStream(w) {
+    if (path == "") cout << "文件路径为空！";
 
 
 }
 
-fileReadWrite::fileReadWrite(string path, ofstream *writeStream, ifstream *readStream) :
-        filePath(path), writeStream(writeStream), readStream(readStream) {
-    if (path.length() == 0) cout << "文件路径为空！";
+fileReadWrite::fileReadWrite(char *path, ifstream *r) :
+        filePath(path), readStream(r) {
+    if (path == "") cout << "文件路径为空！";
 }
 
 void fileReadWrite::openFile(fileReadWrite::model model, bool display) {
-    char  c[100];  //保存控制台输入，最大字数不超过100个
+    char c[100];  //保存控制台输入，最大字数不超过100个
 
     //路径为空，给出提示结束函数运行
-    if (filePath.empty()) {
+    if (filePath == "") {
         cout << "文件路径为空！" << endl;
         return;
     }
 
-    if (writeStream == nullptr){
-        cout << "写入对象为空，没有被初始化！" << endl;
-        return;
-    }
-
-    if (readStream == nullptr){
-        cout << "读取对象为空，没有被初始化！" << endl;
-        return;
-    }
-
-    if (ReadWriteStream == nullptr){
-        cout << "读写对象为空，没有被初始化！" << endl;
-        return;
-    }
 
     switch (model) {
         //如果是写文件
         case write:
+            if (writeStream == nullptr) {
+                cout << "写入对象为空，没有被初始化！" << endl;
+                return;
+            }
+
             writeStream->open(filePath, ios::app); //所有文件读追加到末尾
             //从控制台接收数据，敲击回车键结束输入
-            cout<<"请输入要保存到文中的名字，不超过100个字符，按下回车键结束输入！"<<endl;
-            cin.getline(c,100); //接收输入
+            cout << "请输入要保存到文中的名字，不超过100个字符，按下回车键结束输入！" << endl;
+            cin.getline(c, 100); //接收输入
             //把输入的字符写入到文件中
-            writeStream->write(c,100);
+            writeStream->write(c, 100);
 
             //判断是显示到屏幕还是写入到文件
             if (display) {
-                cout<<"你输入的数据为："<<endl;
-                cout<<c<<endl;
+                cout << "你输入的数据为：" << endl;
+                cout << c << endl;
             }
             break;
 
             //如果是读文件
         case read:
+            if (readStream == nullptr) {
+                cout << "读取对象为空，没有被初始化！" << endl;
+                return;
+            }
+
             writeStream->open(filePath, ios::in); //读模式打开
             //把输入的字符写入到文件中
-            readStream->read(c,100); //最大读取100个字符，并存储在char数组中
-            cout<<"读取的文件完毕！："<<endl;
+            readStream->read(c, 100); //最大读取100个字符，并存储在char数组中
+            cout << "读取的文件完毕！：" << endl;
             //判断是显示到屏幕还是写入到文件
             if (display) {
-                cout<<"读取的文件内容如下："<<endl;
-                cout<<c<<endl;
+                cout << "读取的文件内容如下：" << endl;
+                cout << c << endl;
             }
             break;
 
             //如果是读写文件
         case readWrite:
+            if (ReadWriteStream == nullptr) {
+                cout << "读写对象为空，没有被初始化！" << endl;
+                return;
+            }
+
             int flag;
-            cout<<"请输入文件的操作模式，输入0代表写，输入1代表读"<<endl;
-            cin>>flag;
+            cout << "请输入文件的操作模式，输入0代表写，输入1代表读" << endl;
+            cin >> flag;
 
-            if (flag==0){
+            if (flag == 0) {
                 //写入文件
-                ReadWriteStream->open(filePath,ios::app);
+                ReadWriteStream->open(filePath, ios::app);
                 //从控制台接收数据，敲击回车键结束输入
-                cout<<"请输入要保存到文中的名字，不超过100个字符，按下回车键结束输入！"<<endl;
-                cin.getline(c,100); //接收输入
+                cout << "请输入要保存到文中的名字，不超过100个字符，按下回车键结束输入！" << endl;
+                cin.getline(c, 100); //接收输入
                 //把输入的字符写入到文件中
-                ReadWriteStream->write(c,100);
-                cout<<"写入文件完成，你写入的内容是："<<c<<endl;
+                ReadWriteStream->write(c, 100);
+                cout << "写入文件完成，你写入的内容是：" << c << endl;
 
-            }
-            else if (flag==1){
+            } else if (flag == 1) {
                 //开始读取
                 ReadWriteStream->open(filePath, ios::in); //读模式打开
                 //把输入的字符写入到文件中
-                ReadWriteStream->read(c,100); //最大读取100个字符，并存储在char数组中
-                cout<<"读取的文件完毕，内容为："<<c<<endl;
-            } else{
-                cout<<"你输入有误，程序结束！"<<endl;
+                ReadWriteStream->read(c, 100); //最大读取100个字符，并存储在char数组中
+                cout << "读取的文件完毕，内容为：" << c << endl;
+            } else {
+                cout << "你输入有误，程序结束！" << endl;
             }
 
             break;
@@ -118,10 +124,9 @@ void fileReadWrite::close() {
     //只要读写对象不为空，则调用close方法释放对象
     if (writeStream != nullptr) writeStream->close();
     if (readStream != nullptr) readStream->close();
+    if (ReadWriteStream != nullptr) ReadWriteStream->close();
 }
 
-fileReadWrite::fileReadWrite(string path, ofstream *writeStream, ifstream *readStream, fstream *ReadWriteStream) :
-        filePath(path), writeStream(writeStream), readStream(readStream),ReadWriteStream(ReadWriteStream)
-{
+fileReadWrite::fileReadWrite(char *path, fstream *w) : filePath(path), ReadWriteStream(w) {
 
 }

fileReadWrite.h

@@ -5,8 +5,7 @@
 #ifndef CPP_14_FILE_FILEREADWRITE_H
 #define CPP_14_FILE_FILEREADWRITE_H
 
-#include "iostream"
-#include "string"
+
 #include <fstream>  //操作文件的头文件
 
 using namespace std;
@@ -14,7 +13,7 @@ using namespace std;
 //文件的读取与写入
 class fileReadWrite {
 public:
-    string filePath;  //文件路径
+    char* filePath;  //文件路径
 
     enum model {
         read, write, readWrite
@@ -22,16 +21,16 @@ public:
 
     bool display = false; //是否把数据显示到屏幕
 
-    ofstream *writeStream= nullptr;  //写文件对象
-    ifstream *readStream= nullptr;   //读文件对象
-    fstream *ReadWriteStream= nullptr; //读写文件
+    ofstream *writeStream;  //写文件对象
+    ifstream *readStream;   //读文件对象
+    fstream *ReadWriteStream; //读写文件
 
-    fileReadWrite();
+    /*fileReadWrite();
+    fileReadWrite(string path);*/
 
-    fileReadWrite(string path);
-    fileReadWrite(string path,ofstream *writeStream);
-    fileReadWrite(string path,ofstream *writeStream,ifstream *readStream);
-    fileReadWrite(string path,ofstream *writeStream,ifstream *readStream,fstream *ReadWriteStream);
+    fileReadWrite(char* path,ofstream *writeStream);
+    fileReadWrite(char* path,ifstream *readStream);
+    fileReadWrite(char* path,fstream *ReadWriteStream);
 
     void openFile(model model, bool display);  //打开文件,参数的含义是选择文件的操作模式、文件内容输出目的地
     void close(); //关闭文件

main.cpp

 #include <iostream>
+#include "fileReadWrite.h"
+
+using namespace std;
+
 
 int main() {
-    std::cout << "Hello, World!" << std::endl;
+
+    //文件路径: 在本项目路径下新建一个文本文件叫test.txt
+    string filePath = "test.txt";
+    ifstream infile;
+    infile.open(filePath, ios::in);
+    if (!infile.is_open())
+    {
+        cout << "读取文件失败" << endl;
+    }
+    //第二种读取方法
+    char buf[1024];
+    while (infile.getline(buf,sizeof(buf)))
+    {
+        cout << buf << endl;
+    }
+
+    cout<<buf<<endl;
+
+
     return 0;
 }

test.txt

+hello world!
\ No newline at end of file