How to Java String trim in C++

The Java String trim function is a built-in method that removes any leading and trailing white spaces from a given string. It returns a new string with the white spaces removed. The trim function is useful when dealing with user input or when parsing data from external sources, as it ensures that any extra spaces are removed before processing the data. The trim function can be called on any string object and does not modify the original string. Keep reading below to learn how to Java String trim in C++.

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Java String trim in C++ With Example Code

Java String trim() method is used to remove the leading and trailing white spaces from a string. This method is very useful when we want to remove any unwanted spaces from the beginning or end of a string. In C++, we can achieve the same functionality using the trim() method of the std::string class.

To use the trim() method, we need to include the header file in our program. The syntax of the trim() method is as follows:

string& trim(string& str, const string& chars = "\t\n\v\f\r ")

Here, the first parameter is the string that we want to trim, and the second parameter is the list of characters that we want to remove from the beginning and end of the string. By default, the trim() method removes the white spaces.

Let’s take an example to understand how to use the trim() method in C++:

#include #include


using namespace std;

int main() { string str = " Hello, World! "; cout << "Before trimming: " << str << endl; // trim the string str = trim(str); cout << "After trimming: " << str << endl; return 0; } // trim function string& trim(string& str, const string& chars = "\t\n\v\f\r ") { str.erase(0, str.find_first_not_of(chars)); str.erase(str.find_last_not_of(chars) + 1); return str; }

In the above example, we have defined a trim() function that takes a string and a list of characters as input and returns the trimmed string. We have used the erase() method of the std::string class to remove the unwanted characters from the beginning and end of the string.

We have also used the trim() function to trim a string and printed the output before and after trimming.

In conclusion, the trim() method of the std::string class in C++ can be used to remove the leading and trailing white spaces from a string. It is a very useful method when we want to remove any unwanted spaces from the beginning or end of a string.

Equivalent of Java String trim in C++

In conclusion, the equivalent function to Java's String trim() in C++ is the std::trim() function. This function is part of the C++ Standard Library and can be used to remove whitespace characters from the beginning and end of a string. It is a simple and efficient way to clean up user input or manipulate strings in C++. By using std::trim(), C++ developers can easily achieve the same functionality as Java's String trim() function. Overall, understanding the similarities and differences between programming languages can help developers become more versatile and efficient in their work.