=====empty===== Syntax: #include bool empty() const; The empty() function returns true if the set has no elements, false otherwise. For example, the following code uses empty() to determine if a set is empty: // Create a set of characters set charSet; cout << (charSet.empty() ? "EMPTY " : "NON-EMPTY "); charSet.insert( 'A' ); charSet.insert( 'B' ); charSet.insert( 'C' ); cout << (charSet.empty() ? "EMPTY " : "NON-EMPTY "); charSet.clear(); cout << (charSet.empty() ? "EMPTY " : "NON-EMPTY "); // output is "EMPTY NON-EMPTY EMPTY " Related Topics: [[size]]