C++ String Library - erase

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Description

It erases part of the string, reducing its length.

Declaration

Following is the declaration for std::string::erase.

string& insert (size_t pos, const string& str);

C++11

 string& erase (size_t pos = 0, size_t len = npos);

C++14

string& erase (size_t pos = 0, size_t len = npos);

Parameters

• pos − It is an insertion point.

• str − It is a string object.

• len − It contains information about number of characters to erase.

Return Value

It returns *this.

Exceptions

if an exception is thrown, there are no changes in the string.

Example

In below example for std::string::erase.

#include <iostream>
#include <string>

int main () {
   std::string str ("sairamkrishna Mammahe is a one of the tech person.");
   std::cout << str << '\n';

   str.erase (10,8);
   std::cout << str << '\n';

   str.erase (str.begin()+9);
   std::cout << str << '\n';

   str.erase (str.begin()+5, str.end()-9);
   std::cout << str << '\n';

   return 0;
}

The sample output should be like this −

sairamkrishna Mammahe is a one of the tech person.
sairamkrisahe is a one of the tech person.
sairamkriahe is a one of the tech person.
sairah person.