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What's the best way to trim std::string in C++?
Here we will see how to trim the strings in C++. The trimming string means removing whitespaces from left and right part of the string.
To trim the C++ string, we will use the boost string library. In that library, there are two different methods called trim_left() and trim_right(). To trim string completely, we can use both of them.
Example
#include<iostream> #include<boost/algorithm/string.hpp> using namespace std; main(){ string myStr = " This is a string "; cout << "The string is: (" << myStr << ")" << endl; //trim the string boost::trim_right(myStr); cout << "The string is: (" << myStr << ")" << endl; boost::trim_left(myStr); cout << "The string is: (" << myStr << ")" << endl; }
Output
$ g++ test.cpp $ ./a.out The string is: ( This is a string ) The string is: ( This is a string) The string is: (This is a string) $
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