(COMMENT, // arith.ds
)
(COMMENT, // Start with simple integer and float arithmetic
)
( keyword_function,   )
( keyword_void,   )
( keyword_main,   )
( LEFT_PARAN, ( )
( RIGHT_PARAN, ) )
( LEFT_CUR_BRACE, { )
( keyword_int,   )
( IDENTIFIER, i )
( COMMA, , )
( IDENTIFIER, j )
( COMMA, , )
( IDENTIFIER, k )
( SEMI_COLON, ; )
( keyword_float,   )
( IDENTIFIER, x )
( COMMA, , )
( IDENTIFIER, y )
( COMMA, , )
( IDENTIFIER, z )
( SEMI_COLON, ; )
(COMMENT, // Initialize some simple integer values.
)
( IDENTIFIER, i )
( ASSIGN_EQ, = )
( INT_CONST, 1 )
( SEMI_COLON, ; )
( IDENTIFIER, j )
( ASSIGN_EQ, = )
( INT_CONST, 2 )
( SEMI_COLON, ; )
( IDENTIFIER, k )
( ASSIGN_EQ, = )
( INT_CONST, 3 )
( SEMI_COLON, ; )
(COMMENT, // Now, print them out.
)
( keyword_println,   )
( LEFT_PARAN, ( )
( STRING, " The value of 'i + j * k' should be (7):  " )
( COMMA, , )
( IDENTIFIER, i )
( PLUS, + )
( IDENTIFIER, j )
( STAR, * )
( IDENTIFIER, k )
( RIGHT_PARAN, ) )
( SEMI_COLON, ; )
(COMMENT, // Try the same with REALs.
)
( IDENTIFIER, x )
( ASSIGN_EQ, = )
( REAL_CONST, 1.0 )
( SEMI_COLON, ; )
( IDENTIFIER, y )
( ASSIGN_EQ, = )
( REAL_CONST, 3.14159 )
( SEMI_COLON, ; )
( IDENTIFIER, z )
( ASSIGN_EQ, = )
( MINUS, - )
( LEFT_PARAN, ( )
( IDENTIFIER, x )
( STAR, * )
( IDENTIFIER, y )
( RIGHT_PARAN, ) )
( SEMI_COLON, ; )
(COMMENT, // Copy a REAL to an INTEGER
)
( IDENTIFIER, x )
( ASSIGN_EQ, = )
( MINUS, - )
( IDENTIFIER, z )
( SEMI_COLON, ; )
(COMMENT, // Print out a buncha-junk
)
( keyword_println,   )
( SEMI_COLON, ; )
( keyword_println,   )
( LEFT_PARAN, ( )
( STRING, " We should get -PI and 3 " )
( RIGHT_PARAN, ) )
( SEMI_COLON, ; )
( keyword_println,   )
( LEFT_PARAN, ( )
( STRING, " The value of z and k are " )
( COMMA, , )
( IDENTIFIER, z )
( COMMA, , )
( STRING, " and " )
( COMMA, , )
( IDENTIFIER, k )
( RIGHT_PARAN, ) )
( SEMI_COLON, ; )
( keyword_println,   )
( SEMI_COLON, ; )
(COMMENT, // Show mixed type arithmetic operations.
)
( IDENTIFIER, x )
( ASSIGN_EQ, = )
( INT_CONST, 1 )
( SEMI_COLON, ; )
( IDENTIFIER, z )
( ASSIGN_EQ, = )
( IDENTIFIER, x )
( STAR, * )
( IDENTIFIER, y )
( SEMI_COLON, ; )
( keyword_println,   )
( LEFT_PARAN, ( )
( STRING, " We should, again, get PI " )
( RIGHT_PARAN, ) )
( SEMI_COLON, ; )
( keyword_println,   )
( LEFT_PARAN, ( )
( STRING, " The value of Z is " )
( COMMA, , )
( IDENTIFIER, z )
( RIGHT_PARAN, ) )
( SEMI_COLON, ; )
( keyword_println,   )
( LEFT_PARAN, ( )
( STRING, "\n\t--==>> That's all, Folks! " )
( RIGHT_PARAN, ) )
( SEMI_COLON, ; )
( RIGHT_CUR_BRACE, } )
Totally there are 46 lines