Design of a lexical scanner. Function of lexical scanner is an input source and output word symbols. Write keyword collections and program flow diagram. For example, for the C language source code. Enter the following paragraph: main () ( int a, b a = 10 b = a+ 20 ) Output shown: (2, "main") (5 ,"(") (5 ,")") (5 ,"{") (1, "int") (2, "a") (5 ,",") (2, "b") (5 ," ") (2, "a") (4 ,"=") (3, "10") (5 ," ") (2, "b") (4 ,"=") (2, "a") (4 ,"+") (3, "20") (5 ," ") (5, ")")

cifasaomiaoqi.cpp

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