欢迎交流，代码如下：

利用tinyxml库，tinyxml库的用法百度找把，别忘了工程下包含tinyxml文件（在工程的main.cpp那里添加tinyxml的.cpp文件）。

#include <iostream>
#include <io.h>
#include <boost/filesystem.hpp>  
#include <vector>
#include <map>
#include"tinyxml.h"
#include"tinystr.h"

using namespace std;
namespace fs = boost::filesystem;

std::vector<string> res;
std::map<string, string> mapType;

//获取文件夹下所有文件带路径名称
int get_filenames(const std::string& dir, std::vector<std::string>& filenames)
{
	fs::path path(dir);
	if (!fs::exists(path))
	{
		return -1;
	}
	fs::directory_iterator end_iter;
	for (fs::directory_iterator iter(path); iter != end_iter; ++iter)
	{
		if (fs::is_regular_file(iter->status()))
		{
			filenames.push_back(iter->path().string());
		}
		if (fs::is_directory(iter->status()))
		{
			get_filenames(iter->path().string(), filenames);
		}
	}
	return filenames.size();
}

//字符串分割函数
vector<string> split(const string& str, const string& delim) 
{
	vector<string> res;
	if ("" == str) return res;
	//先将要切割的字符串从string类型转换为char*类型
	char * strs = new char[str.length() + 1]; //不要忘了
	strcpy(strs, str.c_str());

	char * d = new char[delim.length() + 1];
	strcpy(d, delim.c_str());

	char *p = strtok(strs, d);
	while (p) {
		string s = p; //分割得到的字符串转换为string类型
		res.push_back(s); //存入结果数组
		p = strtok(NULL, d);
	}
	return res;
}

//读取.txt配置文件
void readTxt(string file)
{
	std::ifstream infile;
	infile.open(file.data());   //将文件流对象与文件连接起来 
	assert(infile.is_open());   //若失败,则输出错误消息,并终止程序运行 

	string line;
	while (getline(infile, line))
	{
		res = split(line, "/");
		cout << res[0] << endl;

		// 用insert函数插入数据
		mapType.insert(pair<string, string>(res[0], res[1]));

		string new_name = mapType[res[0]];
		cout << "old_name: " << res[0] << endl;
		cout << "new_name: " << new_name << endl;
	}
	infile.close();  //关闭文件输入流 
}

int  main(int argc, char* argv[])
{
	cout << "start!" << endl;
	readTxt("C:\\Users\\admin\\Desktop\\1.txt");
	vector<string> file;
	std::string file_name;
	get_filenames(argv[1], file);
	
	for (int j = 0; j < file.size(); j++)
	{
		std::string file_name;
		cout << "file[j]: " << file[j] << endl;
		file_name = file[j];
		cout << "file_name: " <<file_name << endl;

		//读入一个xml文件
		cout << "read  .xml" << endl;
		const char* p = file_name.data();

		
		//创建一个XML的文档对象。
		TiXmlDocument *myDocument = new TiXmlDocument(p);
		myDocument->LoadFile();

		//获得xml的头，即声明部分
		TiXmlDeclaration* decl = myDocument->FirstChild()->ToDeclaration();

		//获得根元素
		TiXmlElement *RootElement = myDocument->RootElement();
		cout << RootElement->Value() << endl;

		TiXmlElement *First = RootElement->FirstChildElement("object");

		while (First != nullptr)
		{
			TiXmlElement *First2 = First->FirstChildElement("name");
			cout << First2->GetText() << endl;
			std::string old_name = First2->GetText();
			cout << "old_name:  " << old_name << endl;

			if (mapType[old_name] == "")
			{
				break;
			}			
			First2->FirstChild()->SetValue(mapType[old_name].c_str());
			cout << "new_name： " << First2->GetText() << endl;
			First = First->NextSiblingElement("object");
		}
		myDocument->SaveFile();
	}
    return 0;   
}