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6. Input 1 * The usual hello world program, but without * #include because the preprocessor * is optional (see part 2). 2 3 4 * */ 7 8 int main() 9 { return printf("Hello, world!\n"); 10 11 } 6.2 Output for mycc -1 hello.c

6. Input 1 * The usual hello world program, but without * #include because the preprocessor * is optional (see part 2). 2 3 4 * */ 7 8 int main() 9 { return printf("Hello, world!\n"); 10 11 } 6.2 Output for mycc -1 hello.c

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Use C language ro read from file like hello.c and comile them into the format, the token number can find from image two

Image 1. 

6.1 Input 1 /* * The usual hello world program, but without * #include <stdio.h> because the preprocessor * is optional (see part 2). 2 3 4 5 6 */ 8 int main() 9 { return printf ( "Hello, world!\n"); 11 } 10 6.2 Output for mycc -1 hello.c 4 File hello.c Line 8 Token 301 Text int 8 Token 306 Text main 40 Тext ( File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line 8 Token 8 Token 41 Тext ) 9 Token 123 Text { 10 Token 410 Text return 10 Token 306 Text printf 40 Тext ( 10 Token 10 Token 305 Text "Hello, world!\n" 41 Тext ) 10 Token 10 Token 59 Text ; 11 Token 125 Теxt }
Transcribed Image Text:6.1 Input 1 /* * The usual hello world program, but without * #include <stdio.h> because the preprocessor * is optional (see part 2). 2 3 4 5 6 */ 8 int main() 9 { return printf ( "Hello, world!\n"); 11 } 10 6.2 Output for mycc -1 hello.c 4 File hello.c Line 8 Token 301 Text int 8 Token 306 Text main 40 Тext ( File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line File hello.c Line 8 Token 8 Token 41 Тext ) 9 Token 123 Text { 10 Token 410 Text return 10 Token 306 Text printf 40 Тext ( 10 Token 10 Token 305 Text "Hello, world!\n" 41 Тext ) 10 Token 10 Token 59 Text ; 11 Token 125 Теxt }
Value Lexeme Value Lexeme Value Lexeme 37 % 41 ) 33 ! 38 & 40 42 * 43 + 44 45 46 47 58 59 60 61 63 123 { 62 ? 91 93 ) 125 } 124 I Operators with two characters Value Lexeme Value Lexeme Value Lexeme 351 352 != 353 >= == 354 <= 355 ++ 356 -- 357 || 358 && 361 += 362 363 364 Keywords Value Lexeme 401 const Value Lexeme 402 struct Value Lexeme 403 for 404 while 405 do 406 if 407 else 408 break 409 continue 410 return 411 switch 412 case 413 default Lexemes with attributes Value Lexeme Definition 301 type 302 character literal a character enclosed in single quotes; escape sequences are extra credit 303 integer literal 304 real literal void or char or int or float a sequence of one or more digits two sequences each of one or more digits, separated by . a sequence of zero or more characters (including escape sequences, except for \\ and \") enclosed in double quotes a letter or underscore, followed by zero or more letters, underscores, or digits, that is not a keyword or type 305 string literal 306 identifier Table 1: Tokens to be recognized by the lexer.
Transcribed Image Text:Value Lexeme Value Lexeme Value Lexeme 37 % 41 ) 33 ! 38 & 40 42 * 43 + 44 45 46 47 58 59 60 61 63 123 { 62 ? 91 93 ) 125 } 124 I Operators with two characters Value Lexeme Value Lexeme Value Lexeme 351 352 != 353 >= == 354 <= 355 ++ 356 -- 357 || 358 && 361 += 362 363 364 Keywords Value Lexeme 401 const Value Lexeme 402 struct Value Lexeme 403 for 404 while 405 do 406 if 407 else 408 break 409 continue 410 return 411 switch 412 case 413 default Lexemes with attributes Value Lexeme Definition 301 type 302 character literal a character enclosed in single quotes; escape sequences are extra credit 303 integer literal 304 real literal void or char or int or float a sequence of one or more digits two sequences each of one or more digits, separated by . a sequence of zero or more characters (including escape sequences, except for \\ and \") enclosed in double quotes a letter or underscore, followed by zero or more letters, underscores, or digits, that is not a keyword or type 305 string literal 306 identifier Table 1: Tokens to be recognized by the lexer.
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