如何重用字符串流

这些线程不回答我:

重置字符串流

如何清除字符串流变量?

std::ifstream file( szFIleName_p );
if( !file ) return false;

// create a string stream for parsing

std::stringstream szBuffer;

std::string szLine;     // current line
std::string szKeyWord;  // first word on the line identifying what data it contains

while( !file.eof()){

    // read line by line

    std::getline(file, szLine);

    // ignore empty lines

    if(szLine == "") continue;

    szBuffer.str("");
    szBuffer.str(szLine);
    szBuffer>>szKeyWord;

szKeyword 将始终包含第一个单词，szBuffer 不会被重置.我在任何地方都找不到关于如何使用 stringstream 的明确示例.

...
szBuffer.str(szLine);
szBuffer.clear();
szBuffer>>szKeyWord;
...

std::string szLine;     // current line
std::string szKeyWord;  // first word on the line identifying what data it contains

// read line by line

while( std::getline(file, szLine) ){

    // ignore empty lines

    if(szLine == "") continue;

    // create a string stream for parsing

    std::istringstream szBuffer(szLine);
    szBuffer>>szKeyWord;