类没有成员错误 [英] Class Has No Member Error

问题描述

我在此代码上出错....是否需要添加一些内容以获取第三行以返回文件大小?

I''m getting an error on this code....do I need to add something to get the third line to return file size?

for(std::map<std::wstring,>::const_iterator it = map.begin(); 
        it != map.end(); ++it) 
    { 
        MessageBoxW(NULL,it->first.c_str(),L"File Name",MB_OK); 
        MessageBoxW(NULL,it->second.sLastAccessTime.c_str(),L"File Date",MB_OK);
	MessageBoxW(NULL,it->third.nFileSize.c_str(),L"File Size",MB_OK); 
    } 

错误:1 IntelliSense:类"std :: pair"没有成员"third"

The Error: 1 IntelliSense: class "std::pair" has no member "third"

推荐答案

std :: pair是一个模板，具有两个成员，第一个和第二个，没有第三"成员.

假设nFileSize是std :: string second.nFileSize.c_str()可能会达到您的期望.

最好的问候
Espen Harlinn

std::pair is a template with two members, first and second, there is no "third" member.

Assuming that nFileSize is a std::string second.nFileSize.c_str() will probably do what you expect.

Best regards
Espen Harlinn

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