replace_substring.cpp

std::string replace_substring(const std::string& file,const std::string& replace_src,const std::string& replace_target)
{
	std::string resault("");

	std::string::size_type begin_index=0;
	std::string::size_type pos_index=file.find(replace_src,begin_index);

	while(pos_index != std::string::npos)
	{
	
		resault += std::string(file.begin()+begin_index,file.begin()+pos_index);
		resault += replace_target;
		
		begin_index = pos_index+replace_src.size();
		pos_index = file.find(replace_src,begin_index);
	}
	resault += std::string(file,begin_index,file.size()-1);
	
	return resault;
}