c++编码及读写文件

写文件

#include <fstream>
#include <iostream>
using namespace std;

int main()
{   
    ofstream outfile("1.txt",ios::ate);   //打开文件，设置写入方式为覆盖写入

    if(!outfile)
    {
        cout<<"txt文件打开失败!"<<endl;
        exit(0);
    }

    outfile<<"写入txt文件示例.\n";
    outfile<<"成功写入.\n";

    outfile.close();
}

　　读文件并转码

 1 #include <fstream>
 2 #include <iostream>
 3 #include <Windows.h>
 4 #include <string>
 5 using namespace std;
 6 
 7 string UTF8ToGB(const char* str)
 8 {
 9      string result;
10      WCHAR *strSrc;
11      LPSTR szRes;
12 
13      //获得临时变量的大小
14      int i = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
15      strSrc = new WCHAR[i+1];
16      MultiByteToWideChar(CP_UTF8, 0, str, -1, strSrc, i);
17 
18      //获得临时变量的大小
19      i = WideCharToMultiByte(CP_ACP, 0, strSrc, -1, NULL, 0, NULL, NULL);
20      szRes = new CHAR[i+1];
21      WideCharToMultiByte(CP_ACP, 0, strSrc, -1, szRes, i, NULL, NULL);
22 
23      result = szRes;
24      delete []strSrc;
25      delete []szRes;
26 
27      return result;
28 }
29 
30 int main()
31 {
32     char txt[100];
33     string msg;
34     ifstream infile;
35     infile.open("1.txt");
36 
37     if(!infile.is_open())
38     {
39         cout<<""<<endl;
40         exit(0);
41     }
42 
43     while(!infile.eof())
44     {
45         infile.getline(txt,100);
46         msg=UTF8ToGB(txt);
47         cout<<msg<<endl;
48 
49     }
50 
51     infile.close();
52     getchar();
53 }
View Code

 

C++中文乱码解决

 1 #include<iostream>
 2 #include <string>
 3 #include <Windows.h>
 4 using namespace std;
 5 string UTF8ToGB(const char* str)
 6 {
 7      string result;
 8      WCHAR *strSrc;
 9      LPSTR szRes;
10 
11      //获得临时变量的大小
12      int i = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
13      strSrc = new WCHAR[i+1];
14      MultiByteToWideChar(CP_UTF8, 0, str, -1, strSrc, i);
15 
16      //获得临时变量的大小
17      i = WideCharToMultiByte(CP_ACP, 0, strSrc, -1, NULL, 0, NULL, NULL);
18      szRes = new CHAR[i+1];
19      WideCharToMultiByte(CP_ACP, 0, strSrc, -1, szRes, i, NULL, NULL);
20 
21      result = szRes;
22      delete []strSrc;
23      delete []szRes;
24 
25      return result;
26 }
27 
28 string msg;
29 
30 int main ()
31 {
32     const char txt[10] = "哈哈哈";
33     msg=UTF8ToGB(txt);
34     cout<<msg<<endl;
35 
36   return 0;
37 }
View Code

 

posted @ 2017-10-10 18:19  地铁程序员  阅读(497)  评论(0)  编辑  收藏  举报