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


int getNameValue(char *name, char *value)
{
	std::ifstream file;
	std::string buf, bufFromFile, beginName, endName;
	
	int begin, end;

	if (name == NULL || value == NULL) {
		std::cout << "name and value is invalid" << std::endl;
		exit(1);
	}

	beginName.append("<");
	beginName.append(name);
	beginName.append(">");

	endName.append("</");
	endName.append(name);
	endName.append(">");
	
	file.open("MyIp.config");
	if (!file.is_open()) {
		std::cout << "error in open file ";
		exit(1);
	}

	
	while (!file.eof()) {
		file >> bufFromFile;
		buf += bufFromFile;
	}
	file.close();

	std::cout << buf << std::endl;

	begin = buf.find(beginName);
	end = buf.find(endName);

	//std::cout << begin << " " << end << std::endl;

	if (begin < 0 || end < 0) {
		std::cout << "can't find " << name << " Item" << std::endl;
		exit(1);
	}
	if (begin >= end) {
		std::cout << "error in find " << name << " Item" << std::endl;
		exit(1);
	}
	for (int i = 0; i < end - begin - beginName.length(); i++) {
		value[i] = buf.at(begin + beginName.length() + i);
	}

	value[end - begin - beginName.length()] = '\0';
}

int main(int argc, char* argv[])
{
	char *name = "IP";
	char *value = NULL;
	int port;
	
	
	value = new char[100];

	getNameValue(name, value);
}
 

 MyIp.config檔案是一下內容：

<IP>
10.21.243.133</IP>

<PORT>
5000
</PORT>