Description: Principles of curriculum design compiler: (2) the expansion of assignment operator:+ = And-= (3) the expansion of expressions (Pascal s FOR statement): ① FOR <variable>: = <expression> TO <expression> DO <statement> ② FOR <variable>: = <expression> DOWNTO <expression> DO <statement> of which the cycle of statement ① variable step size is 1, the cycle of statement ② variable step size for the-1.
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