Pascal language, the compound statement is begin " end, said the format of a conditional statement is if " then " else " said one, else clause may appear or may not appear. Compile a function, check the Pascal source file begin and end is matched, if, then, else is paired. Input: from a file named pascal.in read data, the file that contains a no comment pascal program. Output: Output file name pascal.out, if the if, then, else, and begin and end pairing, the output " Match!" , Otherwise output " Error!" .

parser.cpp

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