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我在C++中有以下代碼,它應該逐行讀取文件並匹配正則表達式以獲取我正在尋找的信息。該正則表達式的有效性由this link給出,儘管程序沒有找到它。這裏的程序:Boost正則表達式與文件讀取匹配
#include <boost/regex.hpp>
#include <iostream>
#include <fstream>
int main()
{
boost::regex expr1("Property\(C\):\sIP\s\=(.*)\n");
boost::smatch what1;
std::string line;
std::ifstream myfile("document.txt");
if(myfile.is_open()){
std::cout <<"FILE OPEN " <<std::endl;
while(getline(myfile, line))
{
std::cout <<" LINE : " << line <<std::endl;
if (boost::regex_search(line, what1, expr1))
{
std::cout<<"MATCH FOUND " <<std::endl;
for(int i(0); i<what1.size(); i++)
std::cout << "WHAT " <<i<<" "<<what1[i] <<std::endl;
}
}
}
}
該文件應該包含以下DATAS:
Property(C): IP = 127.0.0.1
Property(C): PORT = 9999
Property(C): CURRENTDIRECTORY = C:\Users\logpoint\Downloads\Compressed\command_lines_and_setups_source\Setup\Debug
Property(C): CLIENTUILEVEL = 0
Property(C): CLIENTPROCESSID = 28184
Property(C): VersionDatabase = 200
這有什麼錯在我的代碼?
無需轉義'=',它不是特殊字符。您需要使用雙反斜槓而不是簡單的反斜槓。 – 2014-11-21 05:50:23
我是否應該爲空格字符添加雙反斜槓 – Pant 2014-11-21 05:51:57
是的,是否添加兩個反斜槓表示謝謝。 – Pant 2014-11-21 05:53:09