Pascal Report  195  (a) Read(vI, ... ,vn)  isequivalenttoRead(g,vl, ... ,vn),  where g denotes the textfile program parameter Input.  (b)  Read (f, vI, ... , vn)  is equivalent to the statement  begin  Read(f,vI); ... ;Read(f,vn)  end  where all occurrences of f  denote a single variable.  (c)  Read ( f, v)  is an error if f  is undefined or if f  in not in  inspection mode or if eof  (f)  is  true.  The effect of  Read (f, v)  depends on the type of v.  12.1.1.  Char Read.  Read (f, v),  where  v  denotes  a variable  possessing a type that is compatible with type Char, is equivalent to  assignment of a value to v followed by Get (f).  The value assigned  is either the character at the current position of f or the value of ft, the  choice being implementation-dependent.  (These two values are the  same except following explicit assignments to ft.)  If  eoln (f)  is true  before Read ( f, v) , then the character at the current file position is'  ,  (blank) .  12.1.2.  Integer Read  Read (f, v), where  v  denotes  a variable  possessing a type compatible with type Integer, implies the reading  from  f  of a sequence of characters which form a  Signedlnteger  (see  Section 4) and the assignment of the denoted integer value to v. The  value must be assignment-compatible with the type of v. Preceding  spaces and end-of-line markers are skipped. It is an error if the signed  integer is not found.  12.1.3. Real Read.  Read (f, v) , where v denotes a variable possess­ ing the type Real, implies the reading from f  of a sequence of charac­ ters which form a  SignedNumber  (see Section 4) and the assignment of  the denoted real value to v. Preceding spaces and end-of-line markers  are skipped. It is an error if the signed number is not found.  Let f  denote a textfile, and let vI, ... , vn  denote variables of type  Char or Integer (or subrange of either), or Real.  12.2 Readln  ReadIn(vI, ... ,vn)  is  equivalent to  ReadIn(g,vI, ... ,vn),  and  ReadIn  is equivalent to ReadIn (g), where g denotes the textfile  program parameter Input.  ReadIn (f, vI, ... , vn)  is equivalent to the statement  begin  Read(f,vI, ... ,vn);  ReadIn(f)  end 