Conversion string array of class and character

1. string assign function can be used to assign

  1:  basic_string &assign( const basic_string &str );
  2: // assign a string with str
  3:   basic_string &assign( const char *str );
  4: // assignment with an array of characters 
  5:   basic_string &assign( const char *str, size_type num );
  6: // start with str num characters of a string assignment, 
  7:   basic_string &assign( const basic_string &str, size_type index, size_type len );
  8: // sub-string with a string str assigned to index substring starting at the index for len 
  9:   basic_string &assign( size_type num, char ch );
 10: // num characters with a string assignment ch
 11: 

String S;
 char CH [ 100 ]; 
strcpy (CH, " Hello, World " ); 
s.assign (CH); // converts the character string into an array of 
COUT << endl << S;

2. The string into a character array

String S;
 char CH [ 100 ]; 
S = " Hello, World " ;
 / * strcpy (CH, s.c_str ()); // The first method 
COUT << CH; * / 
strncpy (CH, s.c_str (), s.length () + . 1 ); // length s.length () + 1, because terminator 
cout << ch;

char * strncpy ( char * to, const  char * from , size_t count);
 // string from the copy up to count characters in a string to. If less than the length of the string from the count, the rest with '\ 0' padding. Returns a string processing is completed. 
 const  char * the c_str ();
 // the c_str () function returns a pointer pointing to regular C string, this string with the same content.