Possible Duplicate:
What's the best way to trim std::string
I have a string:
std::string foo = "This is a string "; // 4 spaces at end How would I remove the spaces at the end of the string so that it is:
"This is a string" // no spaces at end please note this is an example and not a representation of my code. I do not want to hard code:
std::string foo = "This is a string"; //wrong Here you can find a lot of ways to trim the string.
First off, NULL chars (ASCII code 0) and whitespaces (ASCII code 32) and not the same thing.
You could use std::string::find_last_not_of to find the last non-whitespace character, and then use std::string::resize to chop off everything that comes after it.
string remove_spaces(const string &s) { int last = s.size() - 1; while (last >= 0 && s[last] == ' ') --last; return s.substr(0, last + 1); } 
trim, check out for example stackoverflow.com/questions/216823/…