basic_string::clear
Erases all elements of a string.
void clear( );
Remarks
The string on which the member function is called will be empty.
Example
// basic_string_clear.cpp
// compile with: /EHsc
#include <string>
#include <iostream>
int main( )
{
using namespace std;
string str1 ("Hello world"), str2;
basic_string <char>::iterator str_Iter;
cout << "The original string str1 is: ";
for ( str_Iter = str1.begin( ); str_Iter != str1.end( ); str_Iter++ )
cout << *str_Iter;
cout << endl;
str1.clear ( );
cout << "The modified string str1 is: ";
for ( str_Iter = str1.begin( ); str_Iter != str1.end( ); str_Iter++ )
cout << *str_Iter;
cout << endl;
//For an empty string, begin is equivalent to end
if ( str1.begin ( ) == str1.end ( ) )
cout << "Nothing printed above because "
<< "the string str1 is empty." << endl;
else
cout << "The string str1 is not empty." << endl;
}
The original string str1 is: Hello world The modified string str1 is: Nothing printed above because the string str1 is empty.
Requirements
Header: <string>
Namespace: std