c ++如何从路径字符串中删除文件名
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c++ how to remove filename from path string
提问by Mat
I have
我有
const char *pathname = "..\somepath\somemorepath\somefile.ext";
how to transform that into
如何将其转化为
"..\somepath\somemorepath"
?
?
回答by dasblinkenlight
The easiest way is to use find_last_ofmember function of std::string
最简单的方法是使用find_last_of成员函数std::string
string s1("../somepath/somemorepath/somefile.ext");
string s2("..\somepath\somemorepath\somefile.ext");
cout << s1.substr(0, s1.find_last_of("\/")) << endl;
cout << s2.substr(0, s2.find_last_of("\/")) << endl;
This solution works with both forward and back slashes.
此解决方案适用于正斜杠和反斜杠。
回答by acraig5075
On Windows use _splitpath()and on Linux use dirname()
在 Windows 上使用_splitpath()和在 Linux 上使用dirname()
回答by roob
On Windows 8, use PathCchRemoveFileSpecwhich can be found in Pathcch.h
在 Windows 8 上，使用PathCchRemoveFileSpec可以在Pathcch.h
PathCchRemoveFileSpecwill remove the last element in a path, so if you pass it a directory path, the last folder will be stripped.
If you would like to avoid this, and you are unsure if a file path is a directory, use PathIsDirectory
PathCchRemoveFileSpec将删除路径中的最后一个元素，因此如果向它传递目录路径，最后一个文件夹将被删除。
如果您想避免这种情况，并且不确定文件路径是否为目录，请使用PathIsDirectory
PathCchRemoveFileSpecdoes not behave as expected on paths containing forwards slashes.
PathCchRemoveFileSpec在包含正斜杠的路径上的行为不符合预期。
回答by Not_a_Golfer
use strrchr()to find the last backslash and strip the string.
用于strrchr()查找最后一个反斜杠并去除字符串。
char *pos = strrchr(pathname, '\');
if (pos != NULL) {
*pos = '##代码##'; //this will put the null terminator here. you can also copy to another string if you want
}
回答by Justin
PathRemoveFileSpec(...) you dont need windows 8 for this. you will need to include Shlwapi.h and Shlwapi.lib but they are winapi so you dont need any special SDK
PathRemoveFileSpec(...) 为此，您不需要 Windows 8。你需要包含 Shlwapi.h 和 Shlwapi.lib 但它们是 winapi 所以你不需要任何特殊的 SDK
