C++ String Library - clear

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Description

It erases the contents of the string, which becomes an empty string.

Declaration

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

void clear();

C++11

void clear() noexcept;

Parameters

none

Return Value

none

Exceptions

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

Example

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

#include <iostream>
#include <string>

int main () {
   char c;
   std::string str;
   std::cout << "Please type some lines of text. Enter a start (*) to finish:\n";
   do {
      c = std::cin.get();
      str += c;
      if (c=='\n') {
         std::cout << str;
         str.clear();
      }
   } while (c!='*');
   return 0;
}

The sample output should be like this −

Please type some lines of text. Enter a start (*) to finish:
sairam.krishna *