I input a line from a file, into a string called line. I then want to scan it to get all the individual parts of it, but I'm unsure of how to do that in c++.
Here's my code:
It's in a specific format the file I'm scanning in, so it's always 3 or 4 words, separated by spaces (the middle name is sometimes included, sometimes not)Code:getline (myfile, line); // sscanf(line, "%s %s %s %s", &nickName, &firstName, &secondName, &thirdName); // the sscanf line is what I'm trying to do
Last edited by SneakySnake; 02-08-2013 at 10:17 AM.
You may want to consider using a stringstream to process your string. You could then use the extraction operator>> to extract the different strings to their respective variables.
Jim
you could do that direct from the file, if you know that each line will only ever contain those fieldsOriginally Posted by jimblumberg
The problem with doing this directly from the file is that the possible missing name will cause problems. With the stringstream it will be easier, in my opinion, to detect this problem because the last entry will be blank, not the name from the next line in the file.
Jim
Jim can you show me an example of what such a line would look like? Scanning for 4 words in the string?
Did you read the link I provided in my last post. That link has links to several other pages that show examples. For instance this sub-link.
Jim
std::getline does have a delimiter, so:
This is also more efficient than stringstreamCode:std::vector<std::string> tokens; std::string line; while (std::getline(myfile, line, ' ')) tokens.push_back(line);
