strip whitespace c++
To strip whitespace in C++, you can use the erase
and remove_if
functions from the <algorithm>
library. Here are the steps to do so:
- Include the necessary header files:
#include <algorithm> // for remove_if
#include <cctype> // for isspace
- Create a string variable and assign the string you want to strip whitespace from:
std::string str = " Hello, World! ";
- Use the
erase
andremove_if
functions to strip whitespace:
str.erase(std::remove_if(str.begin(), str.end(), ::isspace), str.end());
Explanation for each step:
Step 1: The <algorithm>
library provides various algorithms to manipulate and modify sequences of elements, while the <cctype>
library provides functions to work with characters, such as checking if a character is whitespace (isspace
).
Step 2: Create a string variable str
and assign it the string you want to strip whitespace from. In this example, the string is " Hello, World! "
.
Step 3: The std::remove_if
function removes elements from a sequence based on a condition. In this case, we want to remove all whitespace characters from the string. The ::isspace
function is used as the condition, which checks if a character is whitespace. The std::erase
function then erases the elements from str
that were removed by std::remove_if
.
After these steps, the string str
will be modified to "Hello,World!"
with all whitespace characters removed.