20
2
o 1 && 1 = 1
:1 ().
,
,
( ) -
,
(ii) '' ?
"C" "C"
"B" "B"
BCPL ( ) ,
1970 C
,
C
, -
"" ""
, :
1. (1966):
BCPL
2. (1969): "" ,
-7
3. (1972):
,
, ( )
-