C++ 文件路径操作相关函数、获取dll所在的路径

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首先，记录一个网址，感觉很有用，大部分的文件路径相关函数，里面都有源代码。

https://msdn.microsoft.com/en-us/library/windows/desktop/bb773746(v=vs.85).aspx

1、完整路径，去除后缀名 PathRemoveExtensionA

#include <iostream>//cout函数所需#include "atlstr.h"  //PathRemoveExtensionA函数所需using namespace std;void main(void){char buffer_1[] = "C:\\TEST\\sample.txt";char *lpStr1;lpStr1 = buffer_1;cout << "The path with extension is          : " << lpStr1 << endl;PathRemoveExtensionA(lpStr1);cout << "\nThe path without extension is       : " << lpStr1 << endl;system("pause");}

OUTPUT:==================The path with extension is          : C:\TEST\sample.txtThe path without extension is       : C:\TEST\sample

2、完整文件路径，获得目录

#include <iostream>//cout函数所需#include "atlstr.h"  //PathRemoveFileSpecA函数所需using namespace std;void main(void){char buffer_1[] = "C:\\TEST\\sample.txt";char *lpStr1;lpStr1 = buffer_1;cout << "The path with file spec is          : " << lpStr1 << endl;PathRemoveFileSpecA(lpStr1);cout << "\nThe path without file spec is       : " << lpStr1 << endl;//注意如果获得了目录，需要得到另一个文件路径时string filename = lpStr1;filename = filename + "\\samle.txt";system("pause");}

OUTPUT:==================The path with file spec is          : C:\TEST\sample.txtThe path without file spec is       : C:\TEST

3、获取dll所在路径的两种方式

（1）需要dll入口函数的句柄

char szPath[MAX_PATH];GetModuleFileNameA(dllhandle, szPath, MAX_PATH);//BOOL APIENTRY DllMain(HMODULE hModule, DWORD  ul_reason_for_call, LPVOID lpReserved) //dll入口函数

（2）无需dll入口函数的句柄，dll内任意函数都可

EXTERN_C IMAGE_DOS_HEADER __ImageBase;//申明为全局变量char   DllPath[MAX_PATH] = { 0 };GetModuleFileNameA((HINSTANCE)&__ImageBase, DllPath, _countof(DllPath));

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