存储本地txt文件——巧妙做法(内存拷贝)

最近在写一个读写本地txt文件的时候, 遇到了一个麻烦，因为之前vc项目，上面没有问题，

移到新项目工程的时候，突然CString无法使用，加入afx.h 又和 不能重复包含 windows.h 头文件

之前的做法是：

class ParamClass
{
public:

    int m_1;
    int m_2;
    int m_3;
    int m_4;
    int m_5;
    int m_6;

    bool WriteToFile(string str_current_model)
    {
        string file_name = str_current_model + "\param01.txt";
        CString file_name1 = file_name.c_str();

        CStdioFile file1;
        if (!file1.Open(file_name1, CStdioFile::modeCreate | CStdioFile::modeWrite, NULL))
            return false;
        
        CString val;
        val.Format("%d
", m_1);
        file1.WriteString(val);
        val.Format("%d
", m_2);
        file1.WriteString(val);
        val.Format("%d
", m_3);
        file1.WriteString(val);
        val.Format("%d
", m_4);
        file1.WriteString(val);
        val.Format("%d
", m_5);
        file1.WriteString(val);
        val.Format("%d
", m_6);
        file1.WriteString(val);

        file1.Close();

        return true;
    }

    bool ReadFromFile(string str_current_model)
    {
        string file_name = str_current_model + "\param01.txt";
        CString file_name1 = file_name.c_str();

        CStdioFile file1;
        if (!file1.Open(file_name1, CStdioFile::modeRead | CStdioFile::shareExclusive, NULL))
            return false;

        CString val[6];
        int i = 0;
        while (i < 6 && file1.ReadString(val[i++]))
        {
            
        }

        m_1 = atoi(val[0]);
        m_2 = atoi(val[1]);
        m_3 = atoi(val[2]);
        m_4 = atoi(val[3]);
        m_5 = atoi(val[4]);
        m_6 = atoi(val[5]);

        file1.Close();

        return true;
    }
};

因为比较着急，所以想着直接用cpp的库函数来写，百度找了找，拼凑起来以后，是下面这样的，

#pragma once
//craigtao 2018-8-2

#include <iostream>
#include<fstream>  
#include<string>

using namespace std;

class CModelParam0x
{
public:

    string m_sCurrExePath;
    string m_sCurrModel;

    int m_1;
    int m_2;
    int m_3;
    int m_4;
    int m_5;

    bool _write_2_file(string path)
    {
        ofstream of(str_current_path, ios::out);
        of << m_1 << endl;
        of << m_2 << endl;
        of << m_3 << endl;
        of << m_4 << endl;
        of << m_5;

        of.close();

        return true;
    }

    bool _read_from_file(string path)
    {
        int temp1, m;
        string s;
        char buffer[30];
        ifstream fin;

        fin.open(str_current_path, ios::in);
        if (!fin.is_open()) {
            cout << "Error opening file"; exit(1);
        }
        
        int val[5];
        int i = 0;

        while (!fin.eof()) {
            std::getline(fin, s);
            m = atoi(s.substr(0, 6).c_str());
            val[i++] = m;
        }

        fin.clear();
        fin.close();

        m_1 = val[0];
        m_2 = val[1];
        m_3 = val[2];
        m_4 = val[3];
        m_5 = val[4];

        return true;
    }
};

以为这样很简洁了，没想到还有这么一招，看了这一招以后，对自己的计算机素养感到很惭愧，

struct Param
{
    int m_1;
    int m_2;
    int m_3;
};

Param m_Param;

FILE *pFile = fopen("para.txt", "rb");
if (pFile) {
   BYTE BUff[512] = "";
   fread(BUff, sizeof(Param), 1, pFile);
   memcpy(&m_Param, BUff, sizeof(Param));
   fclose(pFile);
}

FILE *pFile = fopen("para.txt", "wb");
if (pFile) {
    fwrite(&m_Param, sizeof(Param), 1, pFile);
    fclose(pFile);
}

这样写入到txt文件中的内容，使用记事本直接打开的话，是一些字符，不是显示代码中实际的值

及简洁又快速，佩服，

希望看到博文的朋友能分享自己使用的一些方法，god bless you!