GetCurrentDirectory和SetCurrentDirectory

GetCurrentDirectory和SetCurrentDirectory是获取和设置的线程的当前工作路径，而不是线程所在路径。下面的代码是源文件所在路径下有一个文件为write.txt，而上一级路径下没有这个文件，来说明这两个函数的功能。

#ifndef _TEST_H

#include <iostream>
#include <windows.h>
#include <string>
#include <stdlib.h>
using namespace std;
int main()
{
	char buf[1000];
	int i=1000;
	GetCurrentDirectory(1000,buf);  //得到当前工作路径

	string a;
	a.assign(buf);
	cout<<a<<endl;
	a.append("\\..\\");

	FILE *pFile;
	pFile = fopen("write.txt","r");
	if (pFile == NULL)
		cout << "open failure" << endl;
	fclose(pFile);

	int test = SetCurrentDirectory(a.c_str());  //设置当前路径值
	if (test == 0 )
		cout << "execute failed\n";
	GetCurrentDirectory(1000,buf);
	cout << buf << endl;
	
	pFile = fopen("write.txt","r");
	if (pFile == NULL)
		cout << "open failure" << endl;
	else 
		fclose(pFile);

	return 0;
}


#endif //_TEST_H