Question

Possible Duplicate:
Remove spaces from std::string in C++

I am starting to learn cpp. Hope you guys can help me. Right now, I am having a problem with strings. I get input from the user and want to ignore the white space and combine the string. Here it is:

getline(cin, userInput);

If user input is: Hello my name is

I want to combine to: Hellomynameis

Is there a quick way to do that. Your help will be much appreciated. Thanks.

EDIT:

And, for another case: if the user input is: keyword -a argument1 argument2 argument3

How do I separate the words, because I want to check what are the “keyword”, “option”, and the arguments.

Answer 1

You can use:

remove_if(str.begin(), str.end(), ::isspace); 

The algorithm only changes the values and not the container contained values, So you need to call string::erase to actually modify the length of the container after calling remove_if.

str.erase(remove_if(str.begin(), str.end(), isspace), str.end()); 

or if you are a Boost Fan, You can simple use:

erase_all(str, " ");