String C++

#include 
#include 
using namespace std;
int main()
{
    string y1( "a\x62" );
    cout << y1 << endl;   // y1 is string "ab".
                                                      
    string y6( "a\xef" );
    cout << y6 << endl;                               
                                                      
    string w1( "a\142" );
    cout << w1 << endl;                               
                                                      
    string w2( "a\142c" );
    cout << w2 << endl;                               
                                                      
    string w3( "a\142142" );
    cout << w3 << endl;                               
                                                      
    string w4( "a\79" );
    cout << w4 << endl;                               
                                                      
    string w5( "\x00007p\x0007q\x0007r\x007s\x07t\x7u" );
    
    cout << w5 << endl; 
    return 0;
}