Visual Studio 项目属性设置：
项目属性→C/C++→常规→附加包含目录
C:\Intel\include\iconv\include;
项目属性→链接器→常规→附加库目录
C:\Intel\include\iconv\lib;
项目属性→链接器→输入→附加依赖项
iconv.lib;
提示缺少"iconv.dll"，需要将iconv.dll拷贝至main.cpp同阶目录。
#include <iostream>
#include <fstream>
#include <string>
#include "C:\Intel\include\iconv\include\iconv.h"//#pragma comment (lib, "iconv.lib")using namespace std;string gb2312_to_utf8(const string& input);
bool FileConvertGb2312ToUtf8(string pathFile);
void SaveToLog(string path, string content);int main(int argc, char* argv[])
{int n = 0;string path = string(argv[0]);string pathLog = path.substr(0, path.find_last_of('\\') + 1) + "log.txt";string log = string("123成功了Hello，world!");SaveToLog(pathLog, log);FileConvertGb2312ToUtf8(pathLog);cin >> n;return n;
}bool FileConvertGb2312ToUtf8(string pathFile)
{int pos = pathFile.find_last_of("\\");string nameFile = pathFile.substr(pos + 1, pathFile.length() - pos - 5);ifstream infile(pathFile, ios::binary);if (!infile) {cerr << "Failed to open input file" << endl;return 1;}string content((istreambuf_iterator<char>(infile)), istreambuf_iterator<char>());infile.close();string utf8_content = gb2312_to_utf8(content);if (utf8_content.empty()) {cerr << "Failed to convert encoding" << endl;return 1;}//pathLog = pathLog.replace(pathLog.find_last_of("log") + 1, 0, "_utf8");string pathFileNew = pathFile.replace(pathFile.find_last_of(nameFile) + 1, 0, "_utf8");ofstream outfile(pathFileNew, ios::binary);if (!outfile) {cerr << "Failed to open output file" << endl;return 1;}outfile.write(utf8_content.data(), utf8_content.size());outfile.close();puts("文件转换成功！");puts(pathFileNew.c_str());return true;
}string gb2312_to_utf8(const string& input)
{iconv_t cd = iconv_open("UTF-8", "GB2312");if (cd == (iconv_t)-1) {cerr << "iconv_open failed" << endl;return "";}size_t inbytesleft = input.size();size_t outbytesleft = inbytesleft * 2;char* inbuf = const_cast<char*>(input.c_str());char* outbuf = new char[outbytesleft];char* outptr = outbuf;if (iconv(cd, (const char**)&inbuf, &inbytesleft, &outptr, &outbytesleft) == (size_t)-1) {cerr << "iconv failed" << endl;iconv_close(cd);delete[] outbuf;return "";}string output(outbuf, outptr - outbuf);delete[] outbuf;iconv_close(cd);return output;
}void SaveToLog(string path, string content)
{ofstream outfile(path);if (outfile.is_open()){outfile << content;outfile.close();puts("文件保存成功");puts(path.c_str());}else{puts("文件保存失败");puts(path.c_str());}
}
详解)
