In this section, we will see how to remove some characters from a string in C++. In C++ we can do this task very easily using erase() and remove() function. The remove function takes the starting and ending address of the string, and a character that will be removed.
Input: A number string “ABAABACCABA”Output: “BBCCB”
Algorithm
Step 1:Take a stringStep 2: Remove each occurrence of a specific character using remove() functionStep 3: Print the result.Step 4: End
In C++, the erase function is a method available for std::string
std::string
Get Free Course. A string in C++ is an ordered sequence of characters. There are three possible ways to create a sequence of characters in C++, a 'string' is just one of these ways: A simple array of characters is just like any other array; but it has no special properties that other arrays may have.
objects in the Standard Template Library (STL). It removes characters from a string. The erase function has several overloaded versions, but the most common form takes two parameters: string& erase(size_t pos, size_t count = npos);
In C++ we can do this task very easily using erase() and remove() function. The remove function takes the starting and ending address of the string, and a character that will be removed.
Using str.replace(), we can replace a specific character. If we want to remove that specific character, we can replace that character with an empty string. The str.replace() method will replace all occurrences of the specific character mentioned.
Erase() function in C++ STL is used to remove elements from the container. It takes two arguments depending on the type of container either vector or string. The erase() function removes 'count' characters from the starting index.
The erase() function's syntax is as follows to delete an element at a given index: iterator erase( const_iterator index );Iterator erase(const iterator start, const iterator end) is the syntax for the erase() function, which removes all the items from a particular start index to the end index.
In the following example, the removeAll() method removes all the special characters from the string and puts a space in place of them. In the following example, we are replacing all the special character with the space.
To remove all the characters other than alphabets(a-z) && (A-Z), we just compare the character with the ASCII value, and for the character whose value does not lie in the range of alphabets, we remove those characters using string erase function. Implementation: C++
To remove a substring, you can split the original string into tokens using the substring as the delimiter, then concatenate the tokens back together using a different delimiter (e.g., an empty space).
Delete All Occurrences of an Element from a Set in C++
To delete all occurrences of a given element from a set first, search for the element to be removed using the std::set::find function if found erase the occurrence of that element from the set using the std::set::erase function.
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